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6. Run the engine until it stops.
7. Start the engine again to make sure that all the fuel is
out of the carburetor.
Troubleshooting
Lawn-Boy designed and built your lawn mower for trouble-free operation. Check the following components and items
carefully. If a problem continues, see your Authorized Service Dealer.
PROBLEM
CORRECTIVE ACTION
Engine will not start
1. Fill the fuel tank with a fresh gasoline-and-oil mixture.
2. Move the throttle lever to the
Choke position.
3. Press the primer three times.
4. Connect the wire to the spark plug.
5. Inspect the spark plug, check the spark plug gap, and replace
the spark plug if it is damaged.
Engine starts hard or loses power
1. Drain and fill the fuel tank with a fresh gasoline-and-oil mixture.
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2. Clean the fuel cap vent or replace the fuel cap.
3. Clean the air filter.
4. Clean the lawn mower discharge chute.
5. Clean the underside of the lawn mower deck.
6. Inspect the spark plug, check the spark plug gap, and replace
the spark plug if it is damaged.
Engine runs rough
1. Connect the spark plug wire.
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2. Inspect the spark plug, check the spark plug gap, and replace
the spark plug if it is damaged.
3. Clean the air filter.
Lawn mower or engine vibrates
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1. Balance the blade.
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excessively
2. Tighten the blade mounting nut.
3. Clean the lawn mower discharge chute.
4. Clean the underside of the lawn mower deck.
5. Tighten the engine mounting bolts.
Uneven cutting pattern
1. Place all four wheels at the same height.
2. Sharpen and balance the blade.
3. Change the mowing pattern.
4. Clean the underside of the lawn mower deck.
Discharge chute plugs
1. Raise the cutting height.
2. Allow the grass to dry before mowing.
3. Clean the underside of the lawn mower deck.
Lawn Mower will not self-propel
1. Adjust the self-propel drive cable.
2. Clean the debris under the belt cover.
