### SPECIFICATIONS Size .65 Bore 0.938 Stroke 0.94

HP 1.1 RPM 2,000 ~ 12,500 Weight 17.5 oz

Part No. 5800 - K&B . 65 Sportster Engine



### WARNING PLEASE READ ALL SAFETY INSTRUCTIONS ! Failure to read, understand and follow these instructions cou ld result in personal injury and/or property dam age to yourself or others. Take a few moments to familiarize yourself with the various parts of the engine. DO NOT DISASSEMB LE YOUR ENGINE! Doing so will void your warranty. No exceptions!



## - ENGINE BREAK-IN It is unnecessary to give the engine a prolonged break-in. Howe ver, we suggest that you mount your engine to a break-in stand to familiarize yourself with it and with the carburetor operation. It is strongly recommended thatfuels containing more than 15% nitromethane be avoided until aft er the engine has been in oper ation for about an hour on a mild fuel, and under mixture-rich conditions. Mixture-rich operat ion is when the engine has a sli ght “burbling” sound and probably a very smoky exhaust. This he lps lubrication and cooling when the engine is new. Typically, an engine will be readyfor full-throttle and mixtur e-lean operation after less t han an hour of running. When the e ngine holds R.P.M. after the mixture has been leaned out ... when R.P.M.’s don’t sag after a moment or so ... the engine can be considered to be broken in.


### ENGINE and FUEL T ANK INSTALLATION The engine may be installed uprigh t, on either side, or inverte d (upside down). The 1/4 inch d iameter output shaft mounts stan dard hole-size propellers. Mount the engine firmly to hardw ood rails, or to the firewall, if you use a radial mount. For ma ximum security, use carbon ste el, selflocking hex nuts and hardened alloy steel machine screws to mou nt the engine. The fuel tank size, locati on, and height have a great influence on engine operation. Itshould be located close to t he engine. For carburet or engines, locate the tank so that its horizontal centerline is from 1/4” to 3/8” below the fuel connection to th e carburetor.


### STARTING THE ENGINE With a full tank of fuel, the recommended propeller installed, and a fully-charged booster batteryof no more than 1.5 volts r eady for connection to glow plug, proceed as follows to manually start a n engine installed in a plane. NOTE : To avoid burning out the glowplug, never use a booster batte ry of more than 1.5 volts. The ba ttery is used to heat the glow plug coil only during engine starting. After the engine has sta rted and is running smoothly, t he booster battery is disconnect ed. Heat from the burning mixture in the cylinder keeps the coil hot. 1. With the booster battery disconnected, turn the needle va lve counter-clockwise 2-1/2 turn s from the fully closed positio n. 

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2 /26 / 201 6 http://www.mecoa.com/kb/58/5800.htm2. With the booster battery s till disconnected and with the throttle wide open, place finger tip over the carburetor inletand flip the propeller quickly 2 or 3 time s, to prime the engine. 3. Remove finger tip from the carburetor inlet then close t he throttle to a fast idle sett ing and again flip the propeller quickly 2 or 3 times. 4. Connect the booster batteryclip to the glow plug. NOTE: Make sure you are holding your a irplane firmly to prevent it f rom lurching forward when the e ngine starts. After it starts, maintain your hold until you hav e reduced the thro ttle to a lowidle speed. 5. Slowly turn the propelle r (counter-clockwise) and “feel” for a momentary resistance, whi ch indicates ignition of the mix ture in the cylinder. 6. Quickly flip the propelle r to start the engine and then d isconnect the booster battery. 7. Except for the first hour or so, as noted under “ Engine Break-in ”, adjust the needle valve by t urning clockwise to lean the mix ture for full power operati on. If the R.P.M. sta rts to sag (back-off ) you have leaned the mixture too much and you should then turn the needle valve counter-clockwise until the R.P.M . picks up and ho lds steady.


### PROPELLERS A 11" x 7p propeller is recommended as a starting size. Howeve r, experimenting with one pitch or diameter larger or smaller c an improve results for your particular airplane.


### CARBURETOR OPERATING INSTRUCTIONS The carburetor enables easy adj ustment of both the idle speed, idle mixture and t he high speed mixture.
1. High Speed N eedle Valve 

### - Locate an area to install the Re mote Needle Valve Assembly usin g the bracket prov ided. This may typically be attached to the fire wall, cowl, or rear engine mou nt lug area. This assembly mu st be in the fuel line between th e tank and the carburetor. The line should not exceed five (5) inches in total length.
2. High Speed Needle Valve Adjustment

### - This needle valve, loc ated on the Remote Needl e Valve Assembly, controls all the fuel that comes to the engine, whethe r the engine is running at hi gh, mid-range, or idle speeds. It does not affect the low spee d rich/lean setting. Th e High Speed Needle Valve's main function , however, is to meter the high-speed fuel mixture. As a starting point for the High Speed Needle adjustment, compl etely close the needle valve (c lockwise), then open it (counter

clockwise) three and a half-turns . This setting is an average and may require further adjustmen ts. For higher altitudes (3,0 00 - 4,000 feet), close the needle valve approximately 1/2 turn. 3. Low Speed and Mid-range Adjustment - The rich/lean adjustment is cont rolled by the "slotted" screw l ocated on the side of t he carburetor where the low speed disk i s housed. The rich/lean mixture cont rol is set at the factory an d may require only a "fine" adj ustment for your application. WARNING : DO NOT RUN THE ENGINE AT A "LEAN" SETTING . This screw only turns 1/4 tu rn to either the right or left o f center. It does not turn all the way around. Turn t he screw clockwise to "lean" th e engine and counter-clockwise to richen the mixture.


### GLOW PLUGS This engine comes equipped with a standard Long Reach Glow Plug (K&B No. 7311). Performance will vary, depending on the glow plug and fuel used.


### K&B Homepage MECOA Homepage FAQ (engine operations) • Warranty• How to Order • How to Contact Us © Model Engine Corporation of America, All rights reserved. K&B and the oval logo are Regis tered Trademarks of Model Engine Corp. of America Registered U.S. Patent Office No part may be reproduced without written permission from MECOA/K&B -- P.O. Box 5 -- Sierra Madre, CA 91025 U.S.A. 

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