Locating Troubles

The following check list will be helpful in locating most operating troubles:

if engine starts hard

1. Spark plugs in bad condition, or partially fouled.

2. Spark plug cables in bad condition and "leaking."

3. Circuit breaker points out of adjustment or in poor condition.

4. Battery nearly discharged.

5. Loose wire connection at one of battery terminals, or at coil or circuit breaker.

6. Carburetor not adjusted correctly.

7. Defective ignition coil.

8. Defective condenser.

9. Engine and transmission oil too heavy. (Winter operation).

10. Engine ignition spark not timed properly.

11. Circuit breaker cam sticking in advance position.

if engine starts but runs irregularis or misses

1. Spark plugs in bad condition, or partially fouled.

2. Spark plug cables in bad condition and "leaking."

3. Spark plug gap too close or too wide.

4. Circuit breaker points out of adjustment or in need of cleaning.

5. Condenser connections loose.

6. Defective ignition coil.

7. Defective condenser

8. Battery nearly discharged.

9. Loose wire connection at one of battery terminals, or at coil or circuit breaker.

10. Intermittent short circuit due to damaged wiring insulation.

11. Water or dirt in fuel system and carburetor.

12. Gasoline tank cap vent plugged or carburetor vent line closed off restricting fuel flow.

13. Carburetor not adjusted correctly.

14. Weak or broken valve springs.

if cranking motor does not operate or does not turn engine over.

1. Ignition switch is not on.

2. Transmission is not in neutral.

3. Discharged battery, or loose or corroded connections (solenoid chatters).

4. Starter control circuit, relay or solenoid defective.

5. Clutch slipping.

6. Electric starter shaft pinion gear not engaging. if engine turns over but does not start

4. Discharged battery or loose or broken battery terminal connection. Check by turning light switch "ON."

5. Fouled spark plugs.

6. Spark plug cables in bad condition and "leaking."

7. Badly oxidized ignition circuit breaker points.

8. Circuit breaker points and/or ignition timing badly out of adjustment.

9. Loose wire connection at one of battery terminals, or at coil or circuit breaker.

10. Defective ignition coil.

11. Defective condenser.

12. Clutch slipping and starter not turning engine over.

13. Sticking valves, or tappets too tight.

14. Engine flooded with gasoline as a result of over-choking.

15. Engine and transmission oil too heavy (winter operation).

if a spark plug fouls repeatedly

1. Too cold a plug for the kind of service or for type of engine.

2. Piston rings badly worn or in bad condition otherwise.

if engine pre-ignites

1. Excessive carbon deposit on piston head or in combustion chamber.

2. Too hot a spark plug for the kind of service or for type of engine.

3. Defective spark plugs.

4. Ignition timing too advanced.

if engine overheats

1. Insufficient oil supply, or oil not circulating.

2. Leaking valves.

3. Heavy carbon deposit.

4. Carburtur adjustment too lean.

5. Ignition timing too late.

6. Low power - circuit breaker cam sticking in retard position.

if engine detonates

1. Unsuitable fuel (octane rating too low).

2. Heavy deposit of carbon on piston head and in combustion chamber (decreases combustion space, thereby increasing compression ratio. The higher the compression ratio, the higher the octane rating of fuel required).

if oil does not return to oil tank

1. Oil tank empty.

2. Scavenger pump gear key sheared.

3. Oil feed pump not functioning.

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