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 downlf 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).
Idle Speed Screw
Fig. 23
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 an authorized service dealer.
sure the cutting attachment has stopped
before the unit is set down to prevent serious
[,_ ARNING: When the unit is turned off make personal injury.
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