Troubleshooting
10
28
Problem
Cause(s)
Engine will not start
1.
Battery has low voltage.
2. Loose or corroded battery connections.
3.
Fuse is blown.
4. Spark plug wire is loose or disconnected
(Gas Powered Units Only!)
5. Faulty spark plug or coil
(Gas Powered Units Only!)
6. Air or water is in the fuel system. Pump the manual prime on the fuel pump.
+
(Diesel Units Only!)
7. In Winter, oil viscosity increases, and engine revolution is slow.
(Diesel Units Only!)
8. No Fuel or improper fuel.
9.
Plugged fuel filter.
10.
Defective starter solenoid.
11. Open-circuit in wiring.
Engine is difficult to start
1.
Engine is cold.
2. Plugged fuel filter.
3.
Carburetor not adjusted properly or dirty.
(Air-Cooled, Gas Powered Units Only!)
4. Engine oil viscosity too heavy.
5. Spark plug is fouled.
(Gas Powered Units Only!)
6. Faulty spark plug or wire.
(Gas Powered Units Only!)
7. Loose or corroded electrical connections.
8. Stale or improper fuel.
9.
Choke
(if equipped)
not being used or adjusted properly.
(Air-Cooled Units Only!)
Engine misses under load
1.
Faulty spark plug.
(Gas Powered Units Only!)
2. Stale or dirty fuel.
3.
Plugged fuel filter.
4. Faulty coil or wire.
(Gas Powered Units Only!)
Engine vapor locks
1.
Poor quality fuel.
2. Very hot weather conditions.
3.
Fuel tank vent plugged.
4. Dirt in fuel filter.
Continued on next page
