TROUBLESHOOTING
Troubleshooting - 78
Engine
Symptom: Possible Cause:
The starter will not engage. The battery disconnect switch is in the O position.
The Tractor Control Module (TCM) is in Sleep mode.
A blown fuse in the power relay module.
A blown fuse in the start circuit.
The parking brake is not engaged.
The parking brake switch is out of adjustment.
The power unit is not in neutral.
The neutral switch is out of adjustment.
Low battery voltage.
The engine cranks, but won't start. The fuel shut-o valve is turned o.
The fuel tank is empty.
A faulty fuel pump.
A plugged fuel lter.
A blockage in the fuel line.
Poor engine compression.
The engine runs rough. Plugged or partially plugged air lter(s).
Plugged or partially plugged fuel lter.
Stale, dirty fuel or wrong seasonal fuel mixture.
The fuel level is low.
Faulty spark plugs.
Moisture in the spark plug pockets.
A faulty fuel pump.
Dirty or faulty fuel injectors.
Incorrect valve clearance.
Valve seat failure.
The engine is low on power. Plugged or partially plugged air lter(s).
Plugged or partially plugged fuel lter.
Dirty or faulty fuel injectors.
Low cylinder compression.
The engine overheats. The radiator screen is dirty.
The coolant level is low.
The engine compartment has debris buildup.
The radiator cap is defective.
The thermostat is defective.
The alternator / fan belt is loose.
A blown head gasket.
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