29
S
ection
10 — t
roubleShooting
Problem
Cause(s)
Engine runs unevenly
1.
Loose electrical connections.
2. Choke (if equipped) or throttle cable sticking.
3.
Fuel line or fuel filter plugged.
4. Stale or dirty fuel.
5. Improper fuel.
6. Air cleaner element plugged.
7. Carburetor not adjusted correctly.
(Air-Cooled Units Only!)
8. Spark plug is fouled.
(Gas Powered Units Only!)
Engine overheats
1.
Air cleaner element missing or plugged.
2. Carburetor air intake tube plugged.
(Air-Cooled Units Only!)
3.
Engine oil low.
4. Engine operated too long at slow engine speed.
(Gas Powered Units Only!)
Engine knocks
1.
Low engine speed.
(Gas Powered Units Only!)
2. Stale or low octane fuel.
(Gas Powered Units Only!)
3.
Engine overloaded.
(Gas Powered Units Only!)
Engine fumes are colored (Black)
(Diesel Units Only!)
1.
Fuel quality is poor.
2. Too much oil.
3.
The air cleaner is clogged.
Engine fumes are colored (Blue white)
(Diesel Units Only!)
1.
The inside of exhaust muffler is dumped with fuel.
2. Injection nozzle trouble.
3.
Poor quality fuel.
Engine overheats
(Diesel Units Only!)
1.
Engine overloaded.
2. Low coolant level.
3.
Dirty radiator core or grille screen.
4. Coolant flow route corroded.
5. Air cleaner element missing or plugged.
6. Engine oil low.
7. Engine operated too long at slow engine speed.
Engine loses power
1.
Engine overheating.
2. Too much oil in engine.
3.
Faulty spark plug.
(Gas Powered Units Only!)
4. Fuel supply being restricted.
5. Fuel filter plugged.
6. Fuel line pinched or kinked.
7. Fuel pump output not adjusted to specification.
(Gas Powered Units Only!)
8. Improper fuel.
(Gas Powered Units Only!)
9.
Insufficient or dirty fuel.
(Diesel Units Only!)
10.
Air cleaner element plugged.
Continued on next page
