FAULT FINDING CHART
Engine Trouble Probable Cause
1. The engine does not start or stops while running 1. Lack of fuel
2. Too much choke
3. Water in the carburetor
4. Carburetor main nozzle clogged
5. Carburetor strainer clogged
6. Gasoline tank vent hole clogged
7. Unsuitable fuel
2. Running irregularly 8. Air leak in the carburetor
9. Spark plug carbonized, sooted or
burned out points
10. Electrode gap too big
3. Engine output too Low 11. Points moistened by water
12. Defective insulation
13. No contact between plug terminal
and cable
4. Engine knocking (Metallic sound when running) 14. Contact breaker point gap short
circuited or dirty
15. Contact breaker point gap too
large or too small
16. Ignition cable, its magneto end
loose or magneto internal wiring
connections loose
5. Fly wheel kicks back 17. Wet magneto
18. Other defects in mage
19. Piston rings carbonized
20. Ignition advance too small
21. Carbon on piston or at cylinder
bead
22. Ignition advance too big
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