Honda HR21 - Troubleshooting Chart

TROUBLESHOOTING CHART
Engine will not start
1. 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.
4. Vent in gas cap and/or carburetor clogged.
Erratic operation
1. Spark plug faulty or improperly gapped (p.25).
2. Dirty air cleaner.
Engine overheats
Excessive vibration
1. Spark plug improperly gapped.
2. Dirty air cleaner.
3. Dirty cooling fins.
4. Low oil level.
5. Starter pulley clogged by grass, etc.
1. Loose blade or engine mounting hardware.
2. Blade unbalanced.
34 HR21