Craftsman 12B-A2B8799 150cc 21" Self-Propelled Lawn Mower

Operator’s Manual - Page 17

For 12B-A2B8799. Also, The document are for others Craftsman models: 247.377001

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17
TROUBLESHOOTING
Problem Cause Remedy
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. Adjust cutting height lever on right front and right rear wheel to
same position.
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.
1. Check belt for proper pulley installation and movement.
2. Stop engine, disconnect spark plug boot, and clean out debris.
3. Inspect and, if necessary, see your Sears Parts & Repair Center to
have belt replaced.
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