Troubleshooting - Honda HRA21 Owner's Manual

TROUBLESHOOTING CHART
Engine will not start
I. No fuel.
2. Throttle lever in "STOP" position.
3. Spark plug wire loose or disconnected.
4. Spark plug faulty or improperly gapped (p. 25).
5. Engine flooded (p. 15).
6. Dirty air cleaner.
Hard starting or loss of power
1. Dirt in gas tank.
2. Dirty air cleaner.
3. Water in gas tank.
Erratic operation
Engine overheats
4. Vent in gas cap and/or carburetor clogged.
I. Spark plug faulty or improperly gapped (p.25).
2. Dirty air cleaner.
1. Spark plug improperly gapped.
2. Dirty air cleaner.
3. Dirty cooling fins.
4. Low oil level.
5. Starter pulley clogged by grass, etc.
Excessive vibration
1. Loose blade or engine mounting hardware.
2. Blade unbalanced.
33