Operator`s manual

CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable though the air
filter/muffler cover (Fig 35).
NOTE: Careless adjustments can seriously damage your
unit. Any nonroad engine repair establishment, individual
or 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 the Oil and Fuel Mixing Instructions in the
Operation section.
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 in the Maintenance section.
Adjust Idle Speed Screw
WARNING The cutting attachment may be
spinning during idle speed adjustment. Wear
protective clothing and observe all safety
instructions to prevent serious personal injury.
If 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, insert a small phillips or flat blade
screwdriver into the hole in the air filter/muffler cover
(Fig. 35). Turn the idle speed screw in, clockwise, 1/8
of a turn at a time (as needed) until the engine idles
smoothly.
NOTE: The cutting attachment should not rotate when
the engine idles.
3. If the cutting attachment rotates when the engine
idles, turn the idle speed screw counterclockwise 1/8
of a turn at a time (as needed), to reduce idle speed.
Checking the fuel mixture, cleaning the air filter and
adjusting the idle speed screw should solve most engine
problems.
If not and:
• The engine will not idle,
• The engine hesitates or stalls on acceleration,
• There is a loss of engine power,
have the carburetor adjusted by any nonroad engine
repair establishment, individual or authorized service
dealer.
WARNING When the unit is turned off make
sure the cutting attachment has stopped before
setting the unit down to prevent serious
personal injury.
Idle Speed Screw
Fig. 35
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