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This engine is designed to operate on unleaded or
low lead gasoline with a 91 minimum octane rating
(Research Method),
The use of unleaded gasoline will lengthen spark
plug and valve life, maintain engine performance
longer, and reduce rust and corrosion of engine
while stored.
A CAUTION! Handle gasoline with care, it
is highly flammable: A. Use approved
gasoline container. B. Never remove the
fuel tank cap or fill the fuel tank when the engine
is running, is hot, or indoors. Also, do not smoke
when working around flammable fuel. Wipe up
spilled gasoline. C. Replace fuel tank cap securely.
CARBURETOR ADJUSTMENTS
1 -Carbu retor
2 -Fuel shut-off
The carbu retor is adjusted at the factory. Do not
make adjustments unless absolutely necessary.
Factory settings are correct for normal operating
conditions. If adjustments are necessary proceed as
follows:
A CAUTION! During operating do not run
the engine in confined area such as
storage building any longer than is
necessary for immediate moving of the machine
ouside into the air. Exhaust gases are toxic.
Opening doors and windows may not provide
adequate ventilation.
Start the engine and allow it to warm up at 3000
RPM. Turn needle valve in until engine misses (lean
mixture) then turn it out past smooth operating
point until engine runs unevenly (rich mixture).
Turn needle valve to the mid-point between rich
and lean so engine runs smoothly. Hold throttle at
idle position and set idle speed, adjusting screw
until engine idle speed is 1800 RPM. Hold throttle
at idle position and turn idle valve in (lean) and out
(rich) until engine idles smoothly. If necessary,
correct idle speed. Release the throttle -engine
should accelerate without hesitation or sputtering.
If engine does not accelerate properly, the car-
buretor should be readjusted, usually to a slightly
richer mixture of needle valve.
1 -Needle valve
2 -Idle valve
3 -Idle speed adjusting screw
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