Engine Maintenance
89
Engine Speed Adjustments
Low Speed Adjustment
1. Start the unit and let it run until the engine is
warmed up.
2. Set the thermostat to make the engine run in
low speed and check the engine speed. The
engine speed should be 1625 ± 25 rpm.
3. If the engine speed is not correct, loosen the
jam nut on the low speed adjustment screw.
4. Turn the low speed adjustment screw to
change the engine speed. Turn the screw in to
increase the engine speed. Turn the screw out
to decrease the engine speed.
5. Set the engine speed at 1625 ± 25 rpm and
tighten the jam nut.
High Speed Adjustment
1. Start the unit and let it run until the engine is
warmed up.
2. Set the thermostat to make the engine run in
high speed and check the engine speed. The
engine speed should be 2425 ± 25 RPM.
3. If the engine speed is not correct, loosen the
jam nut at the end of the adjuster.
4. Unbolt the adjuster from the throttle lever and
turn to adjust the engine speed. Reinstall on
the throttle lever.
5. Set the engine speed at 2425 ± 25 RPM and
tighten the jam nut.
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