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CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable though the Air
filter/muffler cover (Fig 23).
NOTE: Careless adjustments can seriously damage your
unit. An authorized service dealer should make
carburetor adjustments.
Check Fuel Mixture
Old and/or improperly mixed fuel is usually the reason
for the unit not running properly. Drain and refill the tank
with fresh, properly mixed fuel prior to making any
adjustments. Refer to Oil and Fuel Information, Pg. 9.
Clean Air Filter
The condition of the air filter is important to the
operation of the unit. A dirty air filter will restrict air flow
and change the air/fuel mixture. This is often mistaken
for an out of adjustment carburetor. Check the condition
of the air filter before adjusting the idle speed screw.
Refer to Air Filter Maintenance.
Adjust Idle Speed Screw
WARNING: The cutting attachment may be
spinning during carburetor adjustments. Wear
your protective equipment and observe all
safety instructions. For units equipped with a
clutch, be sure the cutting attachment stops
turning when the engine idles. When the unit is
turned off make sure the cutting attachment
has stopped before the unit is set downIf after
checking the fuel mixture and cleaning the air
filter the engine still will not idle, adjust the idle
speed screw as follows.
1. Start the engine and let it run at a high idle for a
minute to warm up.
2. Release the throttle trigger and let the engine idle. If
the engine stops, turn the idle speed screw in
clockwise with a small phillips or flat blade
screwdriver 1/8 of a turn at a time (as needed), until
the engine idles smoothly (Fig. 23).
MAINTENANCE AND REPAIR INSTRUCTIONS
17