MAINTENANCE AND REPAIR INSTRUCTIONS
CARBURETOR ADJUSTMENT
The factory carefully calibrated the carburetor. It seldom needs further adjustment.
Careless adjustments can seriously damage your unit. An authorized service dealer must 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. 11.
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 Pg. 18.
Adjust Idle Speed Screw
WARNING: The cutting attachment may be spinning during carburetor adjustments. 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 doesn’t 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.
Idle Speed Screw
Fig. 35
NOTE: The SpeedSpool® cutting attachment should not rotate when the engine idles.
3.If the SpeedSpool® 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 an authorized service dealer.
WARNING: When the unit is turned off make sure the cutting attachment has stopped before the unit is set down to prevent serious personal injury.
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