Cub Cadet CC3000 manual Maintenance continued, Carburetor Adjustment, Check Fuel Mixture

Maintenance (continued)

2.Use a needlenose pliers to grasp the collar of the spark arrestor and pull it out of the muffler (Fig. 6-13).

NOTE: Use only a needlenose pliers. Other pliers or tools may damage the spark arrestor.

3.Clean the spark arrestor with a wire brush. Replace if damaged or unable to clean thoroughly.

4.Reinstall spark arrestor. Use the needlenose pliers to gently push the spark arrestor back into the muffler until it snaps into place.

Fig. 6-13

CARBURETOR ADJUSTMENT

The idle speed of the engine is adjustable by the screw next to the air filter cover (Fig 6-14).

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. See Section 5, Oil and Fuel.

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. See Section 6, Maintenance.

Adjust Idle Speed Screw

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 screw next to the air filter cover (Fig. 6-14). 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 an authorized service dealer.

Idle Speed Screw

Fig. 6-14

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