Toro 22177 Operator's Manual page 33

Problem
Engine runs rough
Lawn mower or engine
vibrates excessively
Uneven cutting pattern
Discharge chute plugs
Possible Cause
1. The wire is not
connected to the spark
plug.
2. The spark plug is pitted,
fouled, or the gap is
incorrect.
3. The throttle lever is not
in the Fast position.
4. The air lter element is
dirty and is restricting
the air ow.
1. The blade is bent or is
out of balance.
2. The blade mounting
nuts are loose.
3. The underside of the
lawn mower deck
contains clippings and
debris.
4. The engine mounting
bolts are loose.
1. All 4 wheels are not at
the same height.
2. The blade is dull.
3. You are mowing in the
same pattern repeatedly.
4. The underside of the
lawn mower deck
contains clippings and
debris.
1. The throttle lever is not
in the Fast position.
2. The cutting height is too
low.
3. You are mowing too fast. 3. Slow down.
4. The grass is wet.
5. The underside of the
lawn mower deck
contains clippings and
debris.
33
Corrective Action
1. Connect the wire to the
spark plug.
2. Check the spark plug
and adjust the gap if
necessary. Replace the
spark plug if it is pitted,
fouled, or cracked.
3. Move the throttle lever
to the Fast position.
4. Clean the air lter
pre-cleaner and/or
replace the paper air
lter.
1. Balance the blade. If the
blade is bent, replace it.
2. Tighten the blade
mounting nuts.
3. Clean the underside of
the lawn mower deck.
4. Tighten the engine
mounting bolts.
1. Place all 4 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.
1. Move the throttle lever
to the Fast position.
2. Raise the cutting height.
4. Allow the grass to dry
before mowing.
5. Clean the underside of
the lawn mower deck.