New-York tribune., 1909-05-02

astrous results. and that It consumes less gas
olene. There are a large number of motor boat
who hold that two-Cycle engines are ideal Tor
small boats but that in boats OF the larger sizes.
where gasolene constitutes no inconsiderable Item
OF expense. the four-cycls type Of engine can be
used to advantage.
There is an old axiom among motor boat men re-
gardng gasolene consumption with relation 10
horsepower which runs, 'One pint an hour per
horsepower" Actual experience will serve TO de-
monstrate TO any motor boat owner, however, that
the most which can in fairness be claimed for this
rule is that it represents fair average. Actual
running will show that the consumption cannot be
reduced to exact proportion with the horse
power produced. for. a matter Of fact, while
small motors consume more than a pint a
horsepower hour, larger ones consume less
Whatever type OF engine is put in the boat, and
however much gasolene II consumes in proportion
to the horsepower produced, it will not run prop
erly II oil and water with which to Keep Its parts
fabricated and the cylinders cool are denied.
The method of supplying gasoIene 10 an en-
gine is a subject which should be fully investi-
gated by the prospective purchaser, for a perfect
knowledge Of the engine will not suffice without
an equally perfect knowledge of the method by
which IL is supplied with fuel The principle in
volved IN any gasolene fuel supply is not merely
that OF running the liquid itself into the engine.
but TO so manipulate II to obtain a vapor, prop
erly mixed with air, which shall produce the great
est amount OF energy when exploded. One OF the
best known of these is the carburetor system
which as its denotes. is dependent upon a
carburetor Through the medium of this device
mart OF tho air which later enters the engine
chamber IS passed over through the gasolene
before entering the being that in its contact
with the fuel supply II shall absorb gasolens Vapor
IN inst the right proportion to render IL highly ex-
n,osiya The secret Of the successful carburetor
lies of course. In it's ability to mix the air and
the gasoIene vapor in exactly the proper proper
tim Too much vapor Is disastrous TO the etti-
cheney Of the carburetor as too little.
There is also a fuel supply system I'm which small
nur,s are used to force gasolene into the air cur
rent g. II is drawn into the engine thus Great ting
ths proper mixture of air and gasolene vapor In
different forms vaporizers, arranged much on the
sane nrincIple as the familiar perfume vaporZers.
ara enoploved 20 bring about the right combination
of air and gasolene vapor, the fundamental prih-
cnIe of all of them being to make the air do the
work Of setting up the mixture in proper proper
ton In this form the air, instead of coming into
actual contact with the bulk OF gasolene supply
draws with it, in its inward rush past a small
oDening the necessary amount of Sasolene vapor
from small amount OF gasolene automatically Ieo
from, the main supply tank little chamber near
the sir current this system and. In fact III an
other systems of supply it is. however aoso-
ueIv essential that the gasolene be kept Clean Tor
a small particle of grit coggng narrow chanheI
eor,avvhere in the system may reduce the teed
supply as in turn TO down the amount OF gaso-
1ene vapor created and thus lower the force ana
eA7ciency of the explosion. In such a case the
faultv running of the engine attributable ehuIcS
| 70 the careessness laZiness OF the owner OF
onerator of the boat, is invariably pldCeu upon 'e
engine itself or the fuel supply system
rx,ouDrICmroNC CAREFULLY