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Note: Use only Lawn-Boy original equipment or a
Lawn-Boy replacement cutting blade. Other blades
may strike the mulch plate when starting or running
the engine.
For best mulching results, set the engine speed control to
the Mulch Zone position.
Troubleshooting
Lawn-Boy designed and built your lawn mower for trouble-free operation. Check the following components and items
carefully, and refer to Maintenance on page 13 for more information. If a problem continues, contact an Authorized
Service Dealer.
Problem Possible Causes Corrective Action
Engine does not start 1. The fuel tank is empty or the
fuel system contains stale fuel.
2. The throttle lever is not in the
Fast
position.
3. The primer has not been
pressed.
4. The wire is not connected to
the spark plug.
5. The spark plug is pitted, fouled,
or the gap is incorrect.
6. The fuse is blown.
7. The battery charge is too low.
1. Drain and/or fill the fuel tank
with a fresh gasoline-and-oil
mixture. If the problem persists,
contact an Authorized Service
Dealer.
2. Move the throttle lever to the
Fast
position.
3. Press the primer three times.
4. Connect the wire to the spark
plug.
5. Check the spark plug and
adjust the gap if necessary.
Replace the spark plug if it is
pitted, fouled, or cracked.
6. Replace the fuse.
7. Start the engine manually, or
charge the battery and start the
engine with the engine starter
later.
Engine starts hard or loses power 1. The fuel tank contains stale
fuel.
2. The air filter element is dirty
and is restricting the air flow.
3. The underside of the lawn
mower deck contains clippings
and debris.
4. The spark plug is pitted, fouled,
or the gap is incorrect.
1. Drain and fill the fuel tank with
a fresh gasoline-and-oil
mixture.
2. Replace the air filter element.
3. Clean the underside of the lawn
mower deck.
4. Check the spark plug and
adjust the gap if necessary.
Replace the spark plug if it is
pitted, fouled, or cracked.