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20 Section 8 — troubleShooting
Problem Cause Remedy
Occasional skips
(hesitates) at
high speed
1. Spark plug gap too close. 1. Adjust gap. Refer to engine manual.
Idles poorly 1. Spark plug fouled, faulty, or gap too wide.
2. Dirty air cleaner.
1. Reset gap or replace spark plug. Refer to
engine manual.
2. Refer to engine manual.
Excessive Vibration 1. Cutting blade loose or unbalanced.
2. Bent cutting blade.
1. Tighten blade and adapter. Balance blade.
2. See an authorized service dealer.
Mower will not
mulch grass
1. Wet grass.
2. Excessively high grass.
3. Dull blade.
1. Do not mow when grass is wet; wait until
later to cut.
2. Mow once at a high cutting height, then mow
again at desired height or make a narrower
cutting path.
3. Sharpen or replace blade.
Uneven cut 1. Wheels not positioned correctly.
2. Dull blade.
1. Place front and rear wheels in same height
position. (Dual Height Adjusters)
2. Sharpen or replace blade.
Mower will not self propel 1. Belt not installed properly.
2. Debris clogging drive operation.
3. Damaged or worn belt.
4. Drive control out of adjustment.
1. Check belt for proper pulley installation and
movement.
2. Stop engine, disconnect spark plug boot,
and clean out debris.
3. Inspect and replace belt.
4. Adjust drive control. (See Maintenance &
Adjustments section).
High pullback effort 1. Pulling mower backwards before
transmission disengages.
1. Allow the unit to roll forward slightly without
the drive lever(s) engaged before pulling
backwards.