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CARBURETOR ADJUSTMENTS
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.
Recommended Fuel
This engine is designed to operate on leaded
gasoline with a 93 minimum octane rating or on
unleaded or low lead gasoline with a 91 minimum
octane rating (Research Method).
1-Needle valve
2-ldle valve
3-ldle speed adjusting screw
A CAUTION! During operation do not run
the engine in confined areas such as
storage building any longer than is
necessary for immediate moving of the machine
outside into the air. Exhaust gases are toxic.
Opening doors and windows may not provide
adequate ventilation.
The
use of unleaded gasoline will lengthen spark
plug and valve life, maintain engine performance
longer, and reduce rust and corrosion of enginewhile
stored.
CAUTION! Handle gasoline with care, as
it is highly flammable. A. Use approved
gasoline container. B. Never remove the
fuel tank cap or fill 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.
The carburetor is adjusted at the factory. Do not
make adjustments unless absolutely necessary. Fac-
tory settings are correct for normal operating
conditions. I f adjustments are necessary, proceed as
follows:
The
battery is located under the hood and in back
of the fuel tank.
A charging circuit built into the engine provides a
charging circuit output from 2 amperes at 2400
APM to 3 amperes at 3600 APM and uses less than
.2 horsepower.
Check the battery level at least once a month.
Keeping the battery fully charged not only adds to
its life but makes it available for instant use whenneeded.
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