MAINTENANCE & ADJUSTMENTS
CARBURETOR Perform this adjustment if the idle is slow or rough and you’re sure the air cleaner
and spark plug are in good condition.
1. Start the engine in an area with adequate ventilation to
IDLE STOP SCREW
avoid carbon monoxide poisoning. Allow the engine to
warm to normal operating temperature.
2. With the throttle lever at
SLOW,
turn-the throttle stop
screw to set the idle speed.
IDLE SPEED 1750-1950 rpm
The pilot screw is fitted with a limiter cap to prevent
excessive enrichment of the fuel-air mixture. Do not
attempt to remove the limiter cap. It cannot be removed
without breaking the pilot screw.
THROTTLE CABLE In normal use, cables will lose their adjustment. Perform this procedure if the no-
load speed is not within limits or the engine does not seem to respond correctly to
throttle lever movements, or if the choke doesn’t fully close.
II
CABLE HOLDER
GOVERNOR SPRING
\
SCREW
1. Set the throttle lever to
FAST.
2. On the engine, check the clearance between the control lever and the choke
lever. It should be 1 mm (0.04 in) or less. In other words, just touching. The
choke should be fully open.
3. If you need to adjust the clearance, loosen the cable holder and adjust the
position of the cable housing.
4. Next, set the throttle lever to
CHOKE.
5. Adjust the stopper screw so that it just contacts the choke lever when the
choke is fully closed.
6. Check maximum engine speed with a tachometer. Adjust the cable slightly to
obtain the rated speed.