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Troubleshooting
Problem
Engine will not start
Engine is difficult to start
Engine misses under load
Engine vapor locks
Engine runs unevenly
Engine fumes are colored (Black)
Engine fumes are colored (Blue white)
24
1.
Battery has low voltage.
2.
Loose or corroded battery connections.
3.
Fuse is blown.
4.
No Fuel or improper fuel.
5.
Plugged fuel filter.
6.
Air or water is in the fuel system.
7.
In Winter, oil viscosity increases, and engine revolution is slow.
8.
Defective starter solenoid.
9.
Open-circuit in wiring.
1.
Engine is cold.
2.
Plugged fuel filter.
3.
Engine oil viscosity too heavy.
4.
Loose or corroded electrical connections.
5.
Stale or improper fuel.
1.
Stale or dirty fuel.
2.
Plugged fuel filter.
1.
Poor quality fuel.
2.
Very hot weather conditions.
3.
Fuel tank vent plugged.
4.
Dirt in fuel filter.
1.
Loose electrical connections.
2.
Throttle cable sticking.
3.
Fuel line or fuel filter plugged.
4.
Stale or dirty fuel.
5.
Improper fuel.
6.
Air cleaner element plugged.
1.
Fuel quality is poor.
2.
Too much oil.
3.
The air cleaner is clogged.
1.
The inside of exhaust muffler is dumped with fuel.
2.
Injection nozzle trouble.
3.
Poor quality fuel.
Cause(s)
Continued on next page
11
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