Problem
Possible Cause
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 lter element is
dirty and is restricting
the air ow.
4. Clean the air lter
pre-cleaner and/or
replace the paper air
lter.
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
nuts are loose.
2. Tighten the blade
mounting nuts.
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 4 wheels are not at
the same height.
1. Place all 4 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.
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