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Problem
Engine overheats
Engine knocks
Engine loses power
Starter does not work
Starter cranks slowly
Entire electrical system does not work
Dead battery
Battery light comes on when engine is
running
Indicator lights do not come on when key
switch is in START position
1.
Air cleaner element missing or plugged.
2.
Engine oil low.
3.
Engine operated too long at slow engine speed.
1.
Low engine speed.
2.
Stale or low octane fuel.
3.
Engine overloaded.
1.
Engine overheating.
2.
Too much oil in engine.
3.
Faulty spark plug.
4.
Fuel supply being restricted.
5.
Fuel filter plugged.
6.
Fuel line pinched or kinked.
7.
Fuel pump output not adjusted to specification.
8.
Improper fuel.
9.
Air cleaner element plugged.
1.
Loose or corroded connections.
2.
Low battery output
3.
Sulfate or worn-out battery.
4.
Faulty starter.
1.
Low battery output.
2.
Sulfated or worn-out battery.
3.
Engine oil too heavy.
4.
Loose or corroded connections.
1.
Blown fuse.
2.
Loose or corroded connections.
3.
Sulfated or worn-out battery.
1.
Shorted starter solenoid.
2.
Key switch not turned to STOP position.
3.
Sulfated or worn-out battery.
1.
Low engine speed.
2.
Faulty voltage regulator.
3.
Faulty battery.
4.
Faulty alternator
5.
Grounded wire in circuit.
1.
Faulty bulb.
2.
Faulty wiring.
3.
Faulty sensor.
Cause(s)
Continued on next page
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