MAINTENANCE AND REPAIR INSTRUCTIONS

SPARK ARRESTOR MAINTENANCE

1.Remove air filter/muffler cover. Refer to Removing the Air Filter/Muffler Cover.

2.Locate muffler front and the two (2) bolts securing it to the engine (Fig. 29). Remove the two (2) bolts using a flatblade screwdriver or 5/16-inch socket or nut driver. Pull muffler off of the engine.

3.Turn muffler over to the back side and locate the exhaust gasket. Remove the exhaust gasket from the muffler (Fig. 29).

Spark Arrestor

Flatblade

Screwdriver

NOTE: If the exhaust gasket is torn or damaged, replace it with a new gasket before reassembling muffler.

Muffler - Back Side

Spark Arrestor

4.Using a small flatblade screwdriver, carefully pry up the spark arrestor from the recessed hole (Fig. 30). Remove the spark arrestor from the muffler.

5.Clean the spark arrestor with a wire brush. Replace it if it is damaged or if it is impossible to clean thoroughly (Fig. 30).

6.Reinstall the spark arrestor by pressing it into the recessed hole on the muffler's back side. Make sure it fits tightly against the muffler and is not raised up.

7.Place the exhaust gasket against muffler's back side. Align the gasket bolt holes with the bolt holes in the muffler. While holding exhaust gasket in place, insert the bolts into the muffler's front side (Fig. 29).

8.Place the muffler (with the exhaust gasket in place and bolts inserted), against the engine, aligning the bolt holes. Tighten the bolts to secure the muffler to the engine.

If using a torque wrench, torque to:

80-90 in.•lb. (9-10.2 N•m)

9.Reinstall the air filter/muffler cover.

WARNING: If the muffler is not tightened securely, it

could fall off causing damage to the unit and possible serious personal injury.

 

Spark

Exhaust

Bolts

Arrestor

Gasket

Fig. 30

CARBURETOR ADJUSTMENT

The idle speed of the engine is adjustable through the air filter/muffler cover (Fig. 31).

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 improper unit performance. Drain and refill the tank with fresh, properly-mixed fuel prior to making any adjustments. Refer to Oil and Fuel Information.

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

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. Refer to Starting/Stopping Instructions.

WARNING: The cutting attachment may spin

during idle speed adjustments. Wear protective clothing and observe all safety instructions to prevent serious personal injury.

Idle Speed Screw

Muffler - Front Side

Muffler - Back Side

Fig. 29

Fig. 31

15