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Problem Possible Causes Corrective Action
1. The wire is not connected to
the spark plug.
1. Connect the wire to the spark
plug.
2. The spark plug is pitted, fouled,
or the gap is incorrect.
2. Check the spark plug and adjust
the gap if necessary. Replace
the spark plug if it is pitted,
fouled, or cracked.
3. The throttle lever is not in the
Fast position.
3. Move the throttle lever to the
Fast position.
Engine runs rough
4. The air filter element is dirty
and is restricting the air flow.
4. Clean the air filter pre-cleaner
and/or replace the paper air
filter.
1. The blade is bent or is out of
balance.
1. Balance the blade. If the blade
is bent, replace it.
2. The blade mounting bolt is
loose.
2. Tighten the blade mounting bolt.
3. The underside of the lawn
mower deck contains clippings
and debris.
3. Clean the underside of the lawn
mower deck.
Lawn mower or engine
vibrates excessively
4. The engine mounting bolts are
loose.
4. Tighten the engine mounting
bolts.
1. All four wheels are not at the
same height.
1. Place all four wheels at the
same height.
2. The blade is dull. 2. Sharpen and balance the blade.
3. You are mowing in the same
pattern repeatedly.
3. Change the mowing pattern.
Uneven cutting pattern
4. The underside of the lawn
mower deck contains clippings
and debris.
4. Clean the underside of the lawn
mower deck.
1. The throttle lever is not in the
Fast position.
1. Move the throttle lever to the
Fast position.
2. The cutting height is too low. 2. Raise the cutting height.
3. You are mowing too fast. 3. Slow down.
4. The grass is wet. 4. Allow the grass to dry before
mowing.
Discharge chute plugs
5. The underside of the lawn
mower deck contains clippings
and debris.
5. Clean the underside of the lawn
mower deck.
1. The self-propel drive cable is
out of adjustment or is
damaged.
1. Adjust the self-propel drive
cable. Replace the cable if
necessary.
Lawn mower does not self-
propel (Self-Propelled Models
Only)
2. There is debris under the belt
cover.
2. Clean the debris from under the
belt cover.