Safety Instructions & Operator’s Manual for

21” STEEL DECKWALK MOWERSCOMMERCIAL MODELSERIES 12
PUSH
MODELS
C216012RVPROPELLED
MODELS
CP214012R2
CP216012RV
CP216512RV
CP215512KWVMODEL NUMBER EXPLANATIONCPMODEL DESIGNATION
SELF-PROPELLED
CUTTING WIDTHC – Commercial Model
P – Self Propelled Model
21 – 21” Cutting Width
40 – 4.0 HP (Engine Horse Power)
60 – 6.0 HP (Engine Horse Power)
55 – 5.5 HP (Engine Horse Power)
65 – 6.5 HP (Engine Horse Power)

21

55

12

KW

V
ENGINE OPTIONSENGINE TYPESERIES DESIGNATIONENGINE HORSE POWER

12 - Series Designation
KW – Kawasaki Engine
R – Robin Engine
V – Over Head Valve Engine

2 – 2 Cycle Engine

Thank you for buying a SNAPPER Product! Before operating your Walk Behind, read this manual carefully and pay
particular attention to the “IMPORTANT SAFETY INSTRUCTIONS” on Pages 2 & 3. Remember that all power equipment
can be dangerous if used improperly. Also keep in mind that SAFETY requires careful use in accordance with theoperating instructions and common sense.

COPYRIGHT © 1999
SNAPPER INC.
ALL RIGHTS RESERVEDMANUAL No. 3-5725 (REV. 2, 9/2/99)

IMPORTANT SAFETY INSTRUCTIONSWARNING: This powerful cutting machine is capable of amputating hands and feet and can throw objects thatcan cause injury and damage! Failure to comply with the following SAFETY instructions could result in serious
injury or death to the operator or other persons. The owner of the machine must understand these instructions
and must allow only persons who understand these instructions to operate machine. Each person operating themachine must be of sound mind and body and must not be under the influence of any substance, which might
impair vision, dexterity or judgment. If you have any questions pertaining to your machine which your dealer
cannot answer to your satisfaction, call or write the Customer Service Department at SNAPPER, McDonough,Georgia 30253. Phone: (1-800-935-2967).

PROTECTION FOR CHILDREN

PREPARATION

Tragic accidents can occur if the operator is not alert
to the presence of children. Children are often
attracted to the machine and the mowing activity.
Never assume that children will remain where you
last saw them.
1. KEEP children out of the mowing area and under
the watchful care of a responsible adult.
2. DO NOT allow children in yard when machine isoperated and turn machine OFF if anyone enters
the area.
3. DO NOT allow pre-teenage children to operatemachine.
4. ALLOW only responsible adults & teenagers withmature judgment under close adult supervision
to operate machine.
5. DO NOT pull mower backwards unlessabsolutely necessary. LOOK and SEE behind anddown for children, pets and hazards before andwhile backing.
6. USE EXTRA CARE when approaching blind
corners, shrubs, trees, or other objects that may
obscure vision.

(Continued From Previous Column)
3. Data indicates that operators age 60 and above,
are involved in a large percentage of mowerrelated injuries. These operators should evaluate
their ability to operate the mower safely enoughto protect themselves and others from serious
injury.
4. Handle fuel with extra care. Fuels are flammableand vapors are explosive. Use only an approved
fuel container. DO NOT remove fuel cap or add
fuel with engine running. Add fuel outdoors onlywith engine stopped and cool. Clean spilled fueland oil from machine. DO NOT smoke.
5. Check the area to be mowed and remove all
objects such as toys, wire, rocks, limbs andother objects that could cause injury if thrown by
blade or interfere with mowing. Also note thelocation of holes, stumps, and other possible
hazards.
6. Keep people and pets out of the mowing area.
Immediately, STOP Blade, Stop engine and Stop
mower if anyone enters the area.
7. Check shields, deflectors, switches, blade
controls and other safety devices frequently forproper operation and location.
8. Make sure all safety decals are clearly legible.
Replace if damaged.
9. Protect yourself when mowing and wear safety
glasses, long pants and substantial footwear. DO
NOT mow barefooted or with sandals.
10. Know how to STOP blade and engine quickly in
preparation for emergencies.
11. Use extra care when loading or unloading themachine into a trailer or truck.
12. Check grass catcher components frequently forsigns of wear or deterioration and replace asneeded to prevent injury from thrown objects
going through weak or torn spots.

SLOPE OPERATION
1. Slopes are a major factor related to slip and fall
accidents, which can result in severe injury. All
slopes require extra caution. If you feel uneasy
on a slope, DO NOT mow it.
2. Mow across slopes, never up-and-down.
Exercise extreme CAUTION when changing
directions on slopes. DO NOT mow steep slopes
or other areas where stability or traction is in
doubt.
3. Use extra care with crass catchers or otherattachments; these affect the handling and thestability of the machine.

PREPARATION
1. Read, understand, and follow instructions andwarnings in this manual and on the mower,engine and attachments. Know the controls andthe proper use of the mower before starting.
2. Only mature, responsible persons shall operate
the machine and only after proper instruction.

2

IMPORTANT SAFETY INSTRUCTIONSOPERATION

MAINTENANCE AND STORAGE

1.

1. DO NOT store mower or fuel container insidewhere fumes may reach an open flame, spark or
pilot light such as in a water heater, furnace,
clothes dryer or other gas appliance. Allow
engine to cool before storing machine in an
enclosure. Store fuel container out of reach ofchildren in a well ventilated, unoccupied
building.
2. Keep mower and engine free of grass, leaves orexcess grease to reduce fire hazard and engine
overheating.
3. When draining fuel tank, drain fuel into an
approved container outdoors and away fromopen flame.
4. Keep all bolts, especially blade bolts, nuts andscrews properly tight. Check that all cotter pins
are in proper position.
5. Always provide adequate ventilation whenrunning engine. Engine exhaust gases containcarbon monoxide, a deadly poison.
6. Service engine and make adjustments only whenengine is stopped. Removed spark plug wirefrom spark plug and secure wire away fromspark plug to prevent accidental starting.
7. DO NOT change engine governor speed settings
or overspeed engine.
8. Check grass bag assembly frequently for wear or
deterioration to avoid thrown objects andexposure to moving parts. Replace with new bag
if loose seams or tears are evident. Replaceslider or bag adapter if broken or cracked.
9. Mower blades are sharp and can cut. Wrap theblades or wear heavy leather gloves and use
CAUTION when handling them.
10. DO NOT test for spark by grounding spark plugnext to spark plug hole; spark plug could ignite
gas exiting engine.
11. Have machine serviced by an authorized
SNAPPER dealer at least once a year and havethe dealer install any new safety devices.
12. Use only genuine SNAPPER replacement parts toassure that original standards are maintained.

DO NOT put hands or feet near or under rotatingparts. Keep clear of discharge area while engine isrunning.
2. STOP engine when crossing gravel drives, walks, orroads, and under any conditions where thrownobjects might be a hazard.
3. Mow only in daylight or good artificial light.
4. DO NOT operate mower while under the influence ofalcohol or drugs.
5. After striking a foreign object or if mower vibrates
abnormally, STOP the engine, disconnect and secure
spark plug wire. Inspect the mower for any damage
and repair the damage.
6. DO NOT mow near drop offs, ditches orembankments. Operator could lose footing orbalance.
7. STAY ALERT for holes and other hidden hazards.
Tall grass can hide obstacles. Keep away fromditches, washouts, culverts, fences andprotruding objects.
8. DO NOT mow on wet grass. Always be sure ofyour footing. Keep a firm hold on the handle andwalk, never run. Slipping could cause injury.
9. DO NOT leave the machine with the engine
running. STOP BLADE and STOP ENGINE before
leaving the operators position for any reason.
10. Before cleaning, repairing or inspecting makecertain engine, blade and all moving parts have
STOPPED. Disconnect and secure spark plug
wire away from plug to prevent accidental
starting.
11. STOP engine and wait until the blade comes tocomplete STOP before removing grass bag
and/or clearing grass.
12. DO NOT operate mower without the entire grasscatcher or guards in place. DO NOT point
discharge at people, passing cars, windows ordoors.
13. Slow down before turning.
14. Watch out for traffic when near or crossing
roadways.
15. DO NOT operate engine in enclosed areas.
Engine exhaust gases contain carbon monoxide,a deadly poison.

3

TABLE OF CONTENTSIMPORTANT SAFETY INSTRUCTIONS................................................ 2-3
TABLE OF CONTENTS ............................................................................ 4
SECTION 1 - FAMILIARIZATION.............................................................. 5
SECTION 2 - OPERATING INSTRUCTIONS......................................... 6-8
Pre-start Checklist ............................................................................................... 6
Starting & Stopping Engine & Blade.................................................................. 6
Starting & Stopping Wheel Drive ....................................................................... 7
Handle Height Adjustment .................................................................................. 7
Cutting Height Adjustment ................................................................................ .7
Recycling Operation ............................................................................................ 8
Installation of Grass Catcher .............................................................................. 8

SECTION 3 - MAINTENANCE INSTRUCTIONS.................................. 9-12
Change Engine Oil ............................................................................................... 9
Check Transmission Grease............................................................................. 10
Check Mower Blade ........................................................................................... 10
Check Engine Drive Belt ................................................................................... 10
Check Transmission Poly-V Belt...................................................................... 10
Service – Annually ............................................................................................. 11
Engine.............................................................................................................. 11
Air Filter ........................................................................................................... 11
Engine Oil ........................................................................................................ 11
Storage Procedure............................................................................................. 11

SECTION 4 - ADJUSTMENTS AND REPAIR .................................... 12-18
Mower Blade Replacement ............................................................................... 12
Blade Sharpening .............................................................................................. 12
Wheel Drive Control Adjustment...................................................................... 13
Driven and Drive Disc Service ..................................................................... 13-17
Cleaning Drive Disc and Driven Disc............................................................ 14
Drive Spring Repair/Replacement................................................................. 14
Driven Disc Adjustment ............................................................................ 14-15
Driven Disc Replacement.......................................................................... 15-16
Driven Disc Bearing Replacement ................................................................ 16
Hex Shaft Bearing Replacement ................................................................... 17
Belt Service ................................................................................................... 17-18
Engine Drive Belt Replacement ............................................................... 17-18
Transmission Poly-V Belt Replacement ....................................................... 18

TROUBLESHOOTING ............................................................................ 19
SERVICE SCHEDULE ............................................................................ 20
Maintenance/Replacement Parts...................................................................... 20

WARRANTY ............................................................................................ 21
PRIMARY MAINTENANCE ................................................................ 22-25

4

Section 1 - FAMILIARIZATIONWHEEL DRIVECONTROL
ENGINE SPEEDCONTROLWHEEL DRIVE CONTROL RELEASE TO STOPFORWARD MOTIONBLADE CONTROL RELEASE TO STOPBLADE AND ENGINE“CHOKE”“FAST”BLADE
CONTROLGROUNDSPEED
CONTROLGROUNDSPEED
CONTROLFAST“SLOW”ENGINESPEED
CONTROLUPPERHANDLEENGINE
SPEED
DECAL

SLOW

ROPE START HANDLEBAG
SLIDER

FUEL FILLER CAP

MID
HANDLEOIL FILL CAP &DIPSTICK

GRASS
BAG

KAWASAKI 4-CYCLEOHV ENGINELOWER
HANDLEREAR HEIGHT
ADJUSTMENT LATCHMUFFLER

CATCHER MODEL SHOWN(ROPE START MOUNTED ON
LEFT SIDE OF HANDLE)GRASS BAG
CONNECTORFRONT HEIGHT
ADJUSTING LATCHENGINE AIR
BREATHER COVER
BAG ADAPTER

MOWER DECKFIGURE 1.1
1.1 INTRODUCTION
This manual has been prepared for the operators of
the SNAPPER WALK BEHIND MOWERS. Its
purpose, aside from recommending operating androutine service requirements, is to promote safety
through the use of accepted operating practices.
Read, Understand and Follow the “IMPORTANT
SAFETY INSTRUCTIONS” on Pages 2 & 3 of thismanual and all safety messages on the mower andattachments before operating the mower.

1.2 NOMENCLATURE
The nomenclature drawing above, Figure 1.1,
shows the essential parts of the SNAPPER WALKBEHIND MOWERS. It is recommended that all
operators of the mower become thoroughly familiar
with the controls, parts and operation of the mower
before operating. Specific details involving theengine are found in the separate engine owner’s
manual. Study these manuals before operating andkeep both handy for future reference.

5Section 2 - OPERATING INSTRUCTIONS
2.1 PRE-START CHECK LIST
Make the following checks and perform the service
required before each start-up.
2.1.1. Check guards, deflectors, grass bag, adapter
and covers to make sure all are in place and securely
tightened.
2.1.2. Check blade control and wheel drive control
to insure they work freely. See Figure 2.1.
WHEEL DRIVECONTROL

2.1.6. Clean exterior surfaces of cutting deck andengine of any accumulation of spilled fuel, dirt,
grass, oil, etc. Keep engine air intake screen andcooling fins clear at all times.
2.2 STARTING & OPERATION
2.2.1. ENGINE & BLADE
1. Move engine speed control to the “choke”
position. See Figure 2.3.
NOTE: Stop the engine (and blade) by releasing theblade control.

BLADE
CONTROL

CATCHER MODEL SHOWN(ROPE START MOUNTED ON
LEFT SIDE OF HANDLE)

BLADECONTROL

FIGURE 2.1

WHEEL DRIVECONTROL2.1.3. Check cutting height. Adjust to desiredheight.
2.1.4. Check engine oil and add oil as needed tobring level up to the full mark. Refer to Engine Owner’s
Manual for oil specifications. See Figure 2.2.

ENGINE SPEED CONTROL(SHOWN IN CHOKE POSITION)

FIGURE 2.3
2. Pull blade control against handle.
3. Pull rope start handle to crank engine.
4. After engine starts, move engine speed control
away from the choke position to the “Fast” (Rabbit)
position. See Figure 2.3.
5. Allow a brief warm-up until engine runs smooth.

FULL MARK(DO NOT OVER FILL)

FIGURE 2.2
2.1.5. Add fuel to tank after pushing the mower
outside where fumes can safely dissipate. Make
sure cap is tightened after refueling. Refer toEngine Owners Manual for specifications.

6Section 2 - OPERATING INSTRUCTIONS
2.2.2. PROPELLING MOWER(Self Propelled Models)
1. Move ground speed control to the desired
speed position. See Figure 2.4.
2. Move wheel drive control against handle toengage wheel drive and propel mower forward.
Forward speed can be adjusted while the mower ismoving by changing position of the ground speed
control. See Figure 2.4.
MOVE CONTROLAGAINST HANDLE
TO ENGAGEWHEEL DRIVE

2. Move upper mower handle up or down until thedesired position is achieved.
3. Tighten the lower nuts on each lower handle tomaintain desired position.

WARNINGSTOP engine and mower blade by releasing theblade control before adjusting cutting height or
handle height.

MOVE GROUNDSPEED CONTROLTO DESIREDPOSITION(FAST)SIXTH SPEEDPOSITION

2.5 CUTTING HEIGHT ADJUSTMENT
1. Pull the height adjusting latch outward andmove to desired cutting height. See Figure 2.6.

SIXTH

1

LOWEST CUTTINGHEIGHTLATCH

WHEEL DRIVECONTROL
FIRST
BLADE
CONTROL(SLOW)FIRST SPEEDPOSITION

12
3
4

FIGURE 2.4

5

2.3 STOPPING
Stop engine and blade by releasing the blade
control. Stop forward motion of mower by releasing
the wheel drive control.

6

HIGHEST
CUTTING
HEIGHT

6

FIGURE 2.6

2.4 HANDLE HEIGHT ADJUSTMENT
The height of the mower handle can be adjusted
as follows:
1. Loosen the nuts on each lower handle asshown in Figure 2.5.

2. Set all wheels at the same cutting height. The
highest cutting position is Notch 6. The lowest
cutting position is Notch 1. See Figure 2.7.

HIGHERLOWER
HANDLELATCH
POSITIONSLOWER
CUTTING HEIGHT SETTINGSLOOSEN LOWER
NUTS ON EACH
LOWER HANDLE

FIGURE 2.7

FIGURE 2.5

7

Section 2 - OPERATING INSTRUCTIONSHOOK BAG
HANDLE OVER
LOWER HANDLESWARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool. Wear
heavy leather gloves when handling or working
around cutting blades. Blades are extremely sharp
and can cause severe injury.
2.6 RECYCLING OPERATION - OPTIONALACCESSORY
Recycling operation requires optional accessory.

SLIDE CONNECTOROVER END OF
ADAPTER FLANGE

NOTE: For best recycling results, cut up to a maximumof 1/3 of grass blade length and recycle ONLY whengrass is dry.

FIGURE 2.9
1. Set all wheels in the highest cutting position(Notch 6).
2. Move engine speed control to “FAST” (Rabbit)
position.
3. Move ground speed control to slowest speed
setting.
4. Proceed mowing slowly. If grass is very dense,
lower each rear wheel latch one notch lower than
the front wheel latches to improve recycling
performance.

WARNING
DO NOT operate without entire Grass Catcher or
guard in place. Grass Catcher components are
subject to deterioration during normal use. Inspectfrequently and replace worn or damaged
components immediately.

2.7 INSTALLATION of GRASS CATCHER
Position grass bag between handles. See Figure 2.8.
Install grass catcher by sliding connector over flangeof adapter. Attach grass bag hooks over middle
handle cross bar. See Figure 2.9.
LOWER HANDLESHANDLEBAG CONNECTOR

ADAPTER
FLANGEFIGURE 2.88

Section 3 - MAINTENANCE
IMPORTANT: DO NOT tip machine with carburetor or
spark plug down. Oil from crankcase will saturate the air
filter and cause the engine to be hard to start or not startat all. If contamination does occur, the air filter will haveto be replaced.

3.1 INTRODUCTION
To retain the quality of the mower, use genuine
SNAPPER replacement parts only. Contact a local
SNAPPER dealer for parts and service assistance.
For the correct part or information for a particularmower, always mention model and serial number.

(KAWASAKI ENGINES)
1. The items needed to perform oil change are:cloth rags, (1) 24” long plastic hose and (1) 2 quart
shallow pan.
2. Tilt mower on its left wheels and place blocks
under the right wheels. See Figure 3.1.
3. Attach plastic hose over end of nipple on oil
drain plug and allow opposite end to lay in pan.
4. Using a wrench, turn oil drain plug counterclockwise until oil drains freely from engine into pan.

3.2 SERVICE - AFTER FIRST 5 HOURS
3.2.1. CHANGE ENGINE OILWARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool. Wear
heavy leather gloves when handling or working
around cutting blades. Blades are extremely sharp
and can cause severe injury.

NOTE: Check specific model engine owner’s
manual for changing engine oil procedure.
KAWASAKI ENGINE SHOWNOIL
FILTER(ROBIN ENGINES)
1. Refer to Engine Manual for proper oil
specifications and procedures.
2. For simplest/cleanest oil change, loosen lower
handle wing nuts and stand mower up on lower
handle as shown in Figure 3.1. Drain oil throughdipstick tube into a container.

OIL DRAIN
PLUG

NIPPLEATTACH HOSE TOEND OF DRAIN
NIPPLEFIGURE 3.1
5. Retighten oil drain after oil has completely
drained from engine. Remove plastic hose. Wipeup any spilled oil. Dispose of oil properly.
6. Place cloth underneath oil filter. Remove oil
filter and filter gasket. Wipe up any spilled oil.
7. Install new oil filter and filter gasket.
NOTE: Correct oil filter and filter gasket specified
in Engine Owner’s Manual.
8. Fill engine with oil as specified in Engine
Owner’s Manual. Thereafter, change oil after each
25 hours of use.
FIGURE 3.1

9

Section 3 – MAINTENANCE
3.2.2. CHECK GREASE LEVEL IN TRANSMISSIONWARNING

1. Roll machine and remove transmission fill plug.
See Figure 3.2.

DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool. Wear
heavy leather gloves when handling or working
around cutting blades. Blades are extremely sharp
and can cause severe injury.

FILL PLUG

FIGURE 3.2

3.2.3 CHECK MOWER BLADE
1. Disconnect spark plug wire and secure end
away from plug.
2. Tilt mower up on its rear wheels for access tothe blade cap screw. Do not tilt mower with spark
plug or carburetor down. See Figure 3.4.
3. Check torque of blade retaining cap screw.
Recommended torque should be 30 to 40 ft. lbs.
See Figure 3.4.
4. Check blade for sharpness, wear and damage.
Refer to Section “Blade Wear Limits”.

2. Look into plug hole. If liquid grease IS NOT
visible on the input gear (the small gear below theplug hole), add an amount, to cover gear, of
Snapper “00” grease. See Figure 3.2.

3.2.4 CHECK ENGINE DRIVE BELT
1. Visually check engine drive belt for cracking,fraying, severed or belt strands exposed. If worn or
damaged, replace belt before operating mower.

NOTE: Snapper “00” Grease (Part No. 2-9443) isavailable at your SNAPPER dealer. Do not spill grease or
oil on surface of drive disc. See Figure 3.3.

3.2.5 CHECK TRANSMISSION POLY-V BELT
1. Visually check poly-v belt for cracking, fraying,severed or belt strands exposed. If worn or
damaged, replace belt before operating mower.

3. Reinstall transmission plug.
4. Check grease level after each 25 hours ofoperation.

RECOMMENDED
BLADE RETAINING
CAP SCREWTORQUE VALUESHOULD BE 30 TO
40 FT. LBS.

KEEP DRIVEDISC CLEAN !

FIGURE 3.4

FIGURE 3.3

10

Section 3 - MAINTENANCEWARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP engine
and blade. Disconnect spark plug wire and secureaway from spark plug. Engine and components are
HOT. Avoid serious burns, allow sufficient time forall components to cool. Wear heavy leather gloves
when handling or working around cutting blades.
Blades are extremely sharp and can cause severe
injury.
3.3 SERVICE - ANNUALLY
Perform all maintenance as described in the “Service
Schedule” section of this manual.
3.3.1. Engine
Service engine according to engine owner’s manual.
3.3.2. Air Filter
Refer to engine owner’s manual for service
instructions.
3.3.3. Engine Oil
Refer to engine owner’s manual for service
instructions.
3.4 STORAGE PROCEDURE
Refer to the Engine Owner’s Manual for directions
regarding engine storage preparations. Prepare themower for “end of season” storage as follows:
1. Drain fuel from fuel tank and let engine run until
all fuel is out of the carburetor.
2. Disconnect and remove the spark plug wireaway from spark plug before any otherpreparations are made!
3. Tape all openings closed to prevent spraying
water into exhaust or air intakes during washing.
4. Tilt mower up on its rear wheels and thoroughly
clean the underside of the deck. Do not tilt mower
with spark plug or carburetor down. Scrape away
any accumulation of grass with a putty knife and orwire brush.
5. Lubricate all exposed metal with a light coatingof oil to prevent corrosion.
6. On self-propelled models disconnect transfer rod
clip and remove ground speed control rod before
folding handles.
7. Loosen handle knobs. Carefully fold the handles
forward, “flexing” the control cables to prevent cabledamage.
8. Store the mower in a shed or other dry area,
protected from weather.

11Section 4 - REPAIR & ADJUSTMENTS
MAKE SURE THATBLADE HUB IS
SEATEDBETWEEN
FLANGESWARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool. Wear
heavy leather gloves when handling or working
around cutting blades. Blades are extremely sharp
and can cause severe injury.

BLADE
HUB

FLANGEBLADE

4.1 MOWER BLADE REPLACEMENT
4.1.1. STANDARD BLADE WEAR LIMIT
1. Inspect blade frequently for signs of excessive
wear or damage. See Figure 4.1.

CONE WASHER(Concave Side Up)
CAPSCREW

NEW BLADE

FIGURE 4.2

WEAR LIMIT(NOTCH STARTS)DANGEROUS
CONDITION !
DO NOT USE ON
MOWER !
REPLACE WITH NEWBLADE.

4. Sharpen blade on a grinding wheel at an angleof 22 to 28 degrees. DO NOT sharpen blade
beyond original cutting edge. See Figure 4.3.
DO NOT SHARPEN
BEYOND ORIGINAL
CUTTING EDGE

22-28ºBLADE TIP

END VIEW OF
BLADE ASSEMBLY

FIGURE 4.1

ORIGINAL CUTTING EDGE

2. Replace the blade if it is badly chipped, bent,
noticeably out of balance or has cracks or notch ineither tip. See Figure 4.1. Replace with new blade.

FIGURE 4.3
5. Check blade for balance. If necessary, correctbalance by grinding heavy end of blade.
6. Reinstall blade. See Figure 4.1. Check torqueof blade retaining cap screw. Recommended
torque should be 30 to 40 ft. lbs.

WARNING
DO NOT use a cutting blade that shows signs ofexcessive wear or damage. Refer to Section“MOWER BLADE REPLACEMENT” for proper blade
inspection and service procedures.
4.1.2. BLADE SHARPENING
1. Disconnect spark plug wire and secure end
away from plug.
2. Tilt mower up on its rear wheels. Do not tilt
mower with spark plug or carburetor down.
3. Remove blade. See Figure 4.2.

12

Section 4 - REPAIR & ADJUSTMENTS
4. If the wheel drive control fails to return quickly to
the “OFF” position when released, check forbinding at the cable clips located on the side of theright handle. The upper clip should be located 2”
below the upper bolt; the lower clip should be 4”
above the lower bolt. The cable should slide freely
with the clips installed at these locations.

WARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool. Wear
heavy leather gloves when handling or working
around cutting blades. Blades are extremely sharp
and can cause severe injury.

4.3 DRIVEN DISC SERVICE
If the mower does not propel itself properly, See
Figure 4.5. Check for the following problems:

NOTE: The following sections 4.2 through4.4 are for self-propelled models only.

DRIVEN DISC &RUBBER RING

POLY-V-BELT

DRIVE
SPRING

4.2 WHEEL DRIVE CONTROL ADJUSTMENT
1. The wheel drive control is properly adjusted
when there is 1/16” to 1/8” clearance between theinside of the spring hook and the inside of the
clutch cable eye with the wheel drive control
released. See Figure 4.4.

DRIVE
DISC
CLUTCH CABLE
VINYL SPRING
1/16” TO 1/8”
CLEARANCEUPPERSPRINGENGINEDRIVE
BELT

CLUTCH CABLE
EYE

FIGURE 4.5

SPRING HOOKLOWERSPRING

1. Grease on drive disc causing slippage.
2. Broken or disconnected drive spring.
3. Driven disc is out of adjustment.
4. Driven disc rubber ring is worn – does notcontact drive disc properly.
5. Worn Poly-V Belt or engine drive belt.
CABLE

NOTE: If any of the above (1 thru 5) are causing
problems, service as follows:

CLUTCH CABLE EYE
SPRING(Continued on next page)
FIGURE 4.4
2. To adjust, unhook upper spring from cable eye
and rotate spring in direction required to extend or
shorten spring length.
3. Rehook upper spring to cable eye and checkclearance. Repeat procedure if required.
NOTE: The vinyl spring cover should be kept over thespring at all times except for adjustments.

13Section 4 - REPAIR & ADJUSTMENTS
4.3.3. DRIVEN DISC ADJUSTMENT
If the drive disc and driven disc are clean and themower drive is still slipping, adjust the driven discas follows:
1. Place ground speed control in the number six
speed position. See Figure 4.7.

WARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool.

(FAST)SIXTH SPEEDPOSITION

4.3.1. Cleaning Drive Disc & Driven Disc.
If oil or grease on the drive disc or driven disc iscausing slippage, clean discs as follows:
1. Wipe away any oil or grease with a clean cloth.
2. Use either an approved grease solvent or hot,soapy water to clean drive disc or driven disc.
3. Rinse components with clean water.
4. Dry components with a clean cloth.

MOVE GROUND SPEEDCONTROL TO SIXTH
SPEED POSITIONSIXTHGROUNDSPEED
CONTROL

FIRST

4.3.2. Drive Spring Repair/Replacement
If drive spring is loose, reconnect as shown in
Figure 4.6. If spring is broken, replace with new
spring.

(SLOW)FIRST SPEEDPOSITIONFIGURE 4.7

IMPORTANT: If machine drive system continues
slipping see Trouble Shooting section.

2. Remove driven disc spring from driven discassembly. Remove transfer rod connector nut andremove ball joint/transfer rod from driven discassembly anchor point. See Figure 4.8.

USE NEEDLE NOSEPLIERS TO INSTALL
DRIVE SPRING

DRIVEN DISCASSEMBLY
DRIVE
DISC

DRIVE
SPRINGDRIVEN DISCSPRINGBALL JOINTANCHOR
POINT
TRANSFER ROD
CONNECTOR
NUT

FIGURE 4.8

FIGURE 4.6(Continued On Next Page)

14Section 4 - REPAIR & ADJUSTMENTS
4.3.4. Replacing Driven Disc Rubber Ring
If the rubber ring is badly chunked or worn down towithin 1/16” of the metal rim of the driven disc hub,
it must be replaced. Install new rubber ring asfollows:
1. Using a small flat blade screwdriver, free theclip from the transfer rod. Then remove thetransfer rod from the clip and the speed control rod.
See Figure 4.10.

WARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool.
3. Slide driven disc assembly over to 1/8” fromoutside edge of drive disc. Maintaining the 1/8”
measurement, remove any misalignment from thetransfer rod linkage and the driven disc assembly
anchor point. This can be done by loosening nut androtating the transfer rod ball joint clockwise on thetransfer rod until alignment with the driven discassembly anchor point is achieved. Retighten balljoint nut. Insert ball joint into anchor point and reinstall
the connector hex nut and tighten securely. See
Figure 4.9. Move ground speed control to the first
speed position, then back to the sixth speed position.
Recheck the 1/8” measurement described previously.
Reinstall driven disc spring to driven disc assembly.

SLIDE DRIVENDISC ASSEMBLY
TOWARDOUTSIDE EDGE

CONNECTOR
CLIP

TRANSFER
ROD
SPEED CONTROL
ROD

1/8” MEASUREMENT TOOUTSIDE EDGE OF DRIVE
DISC
DRIVE
DISC

FIGURE 4.10

TRANSFER
ROD

CONNECTORHEX NUTOUTSIDEEDGE
ROTATE BALL JOINT
CLOCKWISE

FIGURE 4.9

15

Section 4 - REPAIR & ADJUSTMENTS
4.3.5. Replacing Bearing In Driven DiscIf the driven disc bearing fails, remove the driven
disc assembly and replace bearing as follows:
1. Remove snap ring. See Figure 4.13.

WARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool.

THRUSTPLATESHIMWASHER
SNAP
RING

4.3.4. Replacing Driven Disc Rubber Ring
(Continued From Previous Page)
2. Using needle nose pliers, unhook the drive
spring and slide the driven disc assembly off thehex shaft. See Figure 4.11.
3. Remove the five machine screws and plate
which secure the rubber ring to the driven dischub. See Figure 4.12.
4. Install new rubber ring.
5. Reverse above procedures for reassembly andinstallation.

BEARINGREMOVE FOUR
MACHINE SCREWSDRIVENDISC HUB
RUBBERDISC

DRIVEN DISCPLATE

FIGURE 4.13
2. Slide the hub assembly out of the bearing.
3. Remove the four screws.
4. Remove bearing and replace with new bearing.
5. Reassemble components in reverse order.

DRIVEN DISCASSEMBLY

FIGURE 4.11

DRIVEN DISC HUB
MACHINESCREWSRUBBER
RING
PLATE

FIGURE 4.12
16

Section 4 - REPAIR & ADJUSTMENTS
4.4. BELT SERVICE
On these mowers, the engine belt transmits powerfrom engine to drive disc. The drive disc powers
the poly-v belt which engages the transmissionthat powers the rear wheels. Should these belts
become worn, they could cause slippage which
would impair mower performance. The condition of
the engine belt and poly-v belt should be checked
after every 25 hours of mower operation.

WARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool.
4.3.6. Replacement Of Bearing On Pulley End Of
Hex Shaft
To replace the bearing on the pulley end of the hex
shaft, proceed as follows:
1. Hold the hex shaft with an adjustable wrench
held next to the pulley.
2. Remove the 3/8” hex lock nut which is locatedon the outside of the right wheel bracket. See
Figure 4.14.
3. Remove holder, O-ring and bearing.
4. Install new bearing.
5. Carefully install new O-ring over the outside of the
new bearing.
6. Install bearing holder and secure with screws.
7. Install 3/8” hex lock nut.

4.4.1. Engine Drive Belt Replacement
1. Empty the fuel tank.
2. Unhook the idler spring from the right rear
wheel bracket. See Figures 4.15 and 4.16.
RIGHT REARWHEEL BRACKETSLOT INDECKIDLERSPRING

IDLER
ARM

DRIVE DISCDRIVE BELTENGINE DRIVE PULLEYTOP VIEW OF ENGINE BELT ROUTINGFIGURE 4.15

IMPORTANT: DO NOT tip machine with carburetor or
spark plug down. Oil from crankcase will saturate the air
filter and cause the engine to be hard to start or not startat all. If contamination does occur, the air filter will haveto be replaced.

BALL BEARING“O” RING

3/8”
LOCK NUT

3. Remove the driven disc. Refer to Section on“Replacing Driven Disc Rubber Ring” for driven
disc removal procedure.
4. Do not tilt mower with spark plug or carburetor
down. Tilt mower up on its rear wheels and remove
blade and blade hub. Assistance from anotherperson may be necessary to hold mower in thetilted position.

BALL BEARINGHOLDER

FIGURE 4.14

(Continued On Next Page)

17Section 4 - REPAIR & ADJUSTMENTSWARNING
DO NOT attempt any maintenance, adjustments orservice with engine and blade running. STOP
engine and blade. Disconnect spark plug wire andsecure away from spark plug. Engine andcomponents are HOT. Avoid serious burns, allow
sufficient time for all components to cool.

IDLER
SPRINGRIGHT WHEEL
BRACKET

4.4.1. Engine Drive Belt Replacement(Continued From Previous Page)
5. Hold the slotted end of the drive disc bolt with ascrewdriver and remove the nut and internal tooth lockwasher. See Figure 4.16.

PULL SPRING THROUGHLARGE HOLE & HOOK
INTO SMALL HOLE

DRIVE
DISC

FIGURE 4.17
SLOT IN END
OF DRIVE
DISC BOLT

4.4.2. Transmission Poly-V Belt Replacement
1. Remove the driven disc. Refer to Section
Replacing Driven Disc Rubber Ring” for procedure.
4. Note the routing of the old belt around thethree pulleys before removing it. See Figure 4.18.

POSITION SCRAPERTO CLEAR “V” OF
PULLEY

BUSHINGIDLER
PULLEY
IDLER
ARM
IDLER
SPRINGDECK BRACKET(PARTIALLY
SHOWN)DRIVE
PULLEYBOLTRETAINER
INTERNAL TOOTH
LOCKWASHERDIFFERENTIAL
BRACKET
POLY-VBELT

HEX SHAFT

NUT

FIGURE 4.16
6. Lift the drive disc off the idler arm and remove wornbelt.
7. Loop one end of new belt over engine pulley andinsert the other end through slot in deck. See Figure
4.16.
8. Loop the belt around the pulley on the bottom of thedrive disc.
9. Reinstall drive disc and retaining hardware.
10. Align bushing in bracket and drive disc.
11. Reinstall blade hub and cutter blade. Recommended torque for blade cap screw is 30 to 40 ft. lbs.
13. Use a stiff wire, such as a coat hanger, with a hookfashioned on one end to pull the hooked end of theidler spring through the large hole in the right wheel
bracket. See Figure 4.17.
14. Reinstall the driven disc assembly.

DRIVENPULLEYBELT GUIDEROUTING OF POLY-V BELTFIGURE 4.18
5. Place new Poly-V Belt over end of hex shaft
and onto driven pulley.
6. Work belt onto top of idler pulley.
7. Twist belt sideways and pull it upward between
the differential bracket and drive pulley and thendown into the pulley groove. Make sure the Poly-V
Belt is above belt guide. See Figure 4.18.

18

TROUBLESHOOTINGPROBLEM
Engine Will Not Start
Using Recoil Starter

PROBABLE CAUSE
1. Fuel tank empty.
2. Engine needs choking or priming.

CORRECTIVE ACTION
1. Fill fuel tank with fresh fuel.
2. Choke/Prime. Check Engine Manual for
Instructions.
3. Place spark plug wire onto spark plug.

3. Spark plug wire disconnected.
Engine Stalls or Stops 1. Blade control is released or is not being held securely
After Runningagainst handle.
2. Choke control in the “CHOKE” position.
3. Fuel tank empty.
4. Engine air pre-cleaner and or air cleaner dirty.
5. Spark plug defective or gap set improperly.
6. Water, debris or stale fuel in fuel system.

1. Blade control should be held securely against
handle at all times during operation of mower.
2. Move choke control to “OFF” position.
3. Fill with fuel to proper level.
4. Clean free of all debris.
5. Service spark plug.
6. Drain and clean fuel system.

Engine Loses Power

1. Engine air pre-cleaner or air cleaner dirty
2. Spark plug faulty.
3. Water, debris or stale fuel in fuel system.

1. Clean or replace filters.
2. Service spark plug.
3. Drain and clean fuel system.

Excessive Vibration

1. Damaged, out of balance or bent mower blades.
2. Loose blade components.
3. Loose or missing air lift (if equipped).
4. Lumpy or frayed belt
5. Bent Idler pulley

1. Service mower blade(s).
2. Service and tighten loose parts.
3. Replace air lifts. Tighten to proper torque.
4. Replace belt.
5. Replace pulley.

Mower Will Not Move 1. Damaged transmission
2. Traction drive belt requires replacement
Loss Of Traction(Self-Propelled Models) 3. Driven disc slipping
1. Cutting height too low or high.
Cutting Grass
2. Engine speed too slow.
Improperly
3. Forward ground speed too fast.
4. Terraced cut, side to side.
5. Excessive deck pitch, front to rear.
6. Cutting blade(s) dull or damaged.

1. Adjust cutting height.
2. Move engine speed control to “FAST” position.
3. Move ground speed control to a slower speed.
4. Adjust height of cut with height adjust levers.
5. Adjust height of cut with height adjust levers.
6. Sharpen cutting edges or replace blade(s).

Poor Grass Discharge 1. Engine speed too slow.
2. Forward speed too fast.
3. Grass is wet.
4. Excessively worn or damaged blade(s).
5. Build up of grass clippings and debris under deck.
6. Improper blade(s) installed on deck.
7. Blade(s) installed improperly on deck.

1. Move engine speed control to “FAST” position.
2. Move ground speed control to a slower speed.
3. Mow when grass is dry.
4. Service mower blade(s)5. Clean deck.
6. Install proper SNAPPER blades.
7. Install blades properly.

1. Leaking engine case.

1. Contact authorized SNAPPER dealer.
2. Check and tighten drain plug.
3. Make sure dip stick or oil filler cap is securely
in place.

Oil Leaking

19

1. Contact authorized SNAPPER dealer.
2. Replace traction drive belt.
3. Clean or replace driven disc.

SERVICE SCHEDULEITEMSERVICE PERFORMED

Engine Oil

REF.

EACH
USE
X

5
HRS

25
HRS

Check Oil Level

Page 6

Initial Oil Change

Page 9Periodic Oil Change

Page 10X*

Clean Sponge Element

X**

50
HRS

100
HRS

X

Air Cleaner

Clean or Replace

Engine Manual
Page 10.
Engine Manual.

Spark Plug

ReplaceEngine Manual.

X

Fuel Filter

ReplaceEngine Manual.

X

Clean Shroud & Fins

Engine Manual

X**

Check For Wear And
TensionCheck For Wear, Damage& Replacement
Clean Debris
Accumulation
Check Grease Level

Page 17-18

Air Pre-Cleaner

Engine Cooling
SystemDrive Belts
Mower Blades
Mower Deck
Transmission
GreasePeriodic Grease Check

X**

X

Page 12

X

Page 6 & 11

X

Pages 10

X

X

X

X

Pages 10

X

Check for Wear Damage Page 13-16& Replacement* Change oil every 25 hours when operating under heavy load or high temperatures.
**Clean more often under dusty conditions or when air debris is present
Drive Disc

4.5.

EACH
SEASONX

MAINTENANCE/REPLACEMENT PARTS

MAINTENANCE PARTS
Engine Speed Control (Robin 4 Cycle Engines)
Engine Speed Control (Robin 2 Cycle Engines)
Engine Speed Control (Kawasaki Engine)
Blade Control Cable (Robin 4 Cycle Engines)
Blade Control Cable (Robin 2 Cycle Engines)
Blade Control Cable (Kawasaki Engine)
Clutch Pull Cable
Cutter Blade (Air Lift Compatible)
Cutter Blade (Mulching)
Cutter Blade (Not Air Lift Compatible)
Cutter Blade (Ninja - Quad Edge)
Wheel Drive Pulley to Transmission Pulley Belt
Engine to Drive Disc Belt
Rubber Drive Tire
Parts Manual for 21” Steel Deck Commercial Model
Walk Behind Mower Series 12203-58543-58542-64673-58812-73932-68752-5013
1-97951-71682-66912-64071-23541-23532-336406145

3 YEAR LIMITED WARRANTY
For three (3) years from purchase date for the original purchaser's residential, non-commercial use, SNAPPER, throughany authorized SNAPPER dealer will replace, free of charge (except for taxes where applicable), any part or parts foundupon examination by the factory at McDonough, Georgia, to be defective in material or workmanship or both.
For two (2) years from purchase date for the original purchaser's commercial, rental, or other non-residential use,
SNAPPER, through any authorized SNAPPER dealer will replace, free of charge, any part or parts found upon
examination by the factory at McDonough, Georgia, to be defective in material or workmanship or both.
All transportation costs incurred by the purchaser in submitting material to an authorized SNAPPER dealer for
replacement under this warranty must be paid by the purchaser.
This warranty does not apply to engines and their components, and batteries, as these items are warranted separately.
This warranty does not apply to parts that have been damaged by accident, alteration, abuse, improper lubrication,
normal wear, or other cause beyond the control of SNAPPER. This warranty does not cover any machine or component
part that has been altered or modified changing safety, performance, or durability.
Batteries have a one (1) year prorated warranty period with free replacement if required during the first ninety (90) days
from the original purchase date. SNAPPER will not be responsible for any installation cost incurred. The battery warranty
only covers original equipment batteries and does not cover damage to the battery or machine caused by neglect orabuse, destruction by fire, explosion, freezing, overcharging, improper maintenance, or use of improper electrolyte.
There is no other express warranty.
DISCLAIMER OF WARRANTY
Implied warranties, including those of merchantability and fitness for a particular purpose, are limited to three(3) years from purchase date for the original purchaser's residential or other non-commercial use, and two (2)years from purchase for the original purchaser's commercial, rental or other non-residential use, and to theextent permitted by law, any and all implied warranties are excluded. This is the exclusive remedy. Liabilities forconsequential damages, under any and all warranties are excluded.
Some states do not allow limitations on how long an implied warranty lasts, or do not allow the exclusion orlimitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
WARNING: THE USE OF REPLACEMENT PARTS OTHER THAN GENUINE SNAPPER PARTS MAY IMPAIR THE
SAFETY OF SNAPPER PRODUCTS AND WILL VOID ANY LIABILITY AND WARRANTY BY SNAPPERASSOCIATED WITH THE USE OF SUCH PARTS.
IMPORTANT: Please fill out the attached SNAPPER Product Registration Card immediately and mail to:

Snapper’s Product Registration Center, P.O. Box 1379, McDonough, Georgia 30253

21

PRIMARY MAINTENANCE

22

PRIMARY MAINTENANCE

23

PRIMARY MAINTENANCE

24

PRIMARY MAINTENANCE

25

SERVICE NOTES_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
26

SERVICE NOTES_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
27

Safety Instructions & Operator’s Manual for

21” STEEL DECKWALK MOWERSCOMMERCIAL MODELSERIES 12

IMPORTANTSnapper products are built using engines that meet or exceed all applicable emissions requirements on
the date manufactured. The labels on those engines contain very important emissions information andcritical safety warnings. Read, Understand, and Follow all warnings and instructions in this manual, theengine manual, and on the machine, engine and attachments. If you have any questions about your
Snapper product, contact your local authorized Snapper dealer or contact Snapper Customer Service at
Snapper, McDonough, GA. 30253. Phone: (1-800-935-2967).

WARNING:The engine exhaust from this product contains chemicals known to the Stateof California to cause cancer, birth defects or other reproductive harm.

COPYRIGHT © 1999
SNAPPER INC.
ALL RIGHTS RESERVEDMANUAL No. 3-5725 (REV. 2, 9/2/99)28