Exmark 4500-645 manual Troubleshooting, Problem Possible Cause Corrective Action

Troubleshooting

Troubleshooting

Important: It is essential that all operator safety mechanisms be connected and in proper operating condition prior to mower use.

When a problem occurs, do not overlook the simple causes. For example: starting problems could be caused by an empty fuel tank.

The following table lists some of the common causes of trouble. Do not attempt to service or replace major items or any items that call for special timing of adjustment procedures (such as valves, governor, etc.). Have this work done by your Engine Service Dealer.

Note: When disconnecting electrical connectors DO NOT pull on the wires to separate the connectors.

Problem		Possible Cause		Corrective Action
Starter does not crank	1.	PTO is engaged.	1.	Disengage the PTO.
	2.	Parking brake is not engaged.	2.	Set the parking brake.
	3.	Drive levers are not in neutral lock	3.	Ensure the drive levers are in the neutral
		position.		lock position.
	4.	Battery does not have a full charge.	4.	Charge the battery. See Check
				Battery Charge and Recommended
				Jump Starting Procedure sections in
				Maintenance.
	5.	Electrical connections are corroded, loose	5.	Check the electrical connections for
		or faulty.		good contact. Clean connector terminals
				thoroughly with electrical contact cleaner,
				apply dielectric grease and reconnect.
	6.	Fuse is blown.	6.	Replace the blown fuse.
	7.	Relay or switch is defective.	7.	Contact an Authorized Service Dealer.
	8.	Faulty module.	8.	Replace module.
Engine will not start, starts hard, or fails to	1.	Engine oil level is low.	1.	Check and add oil if necessary.
keep running	2.	LPG tank is overfilled.	2.	Take tank to an approved LPG provider
				to bleed off some fuel.
	3.	Oil level in the crankcase is low.	3.	Add oil to the crankcase.
	4.	LPG tank is not an Exmark approved	4.	Remove tank and replace with an Exmark
		vapor tank.		approved LPG vapor tank.
	5.	Engine is flooded.	5.	Shut off fuel valve. Let unit set for 15-30
				minutes. With the valve still off and the
				throttle in the “SLOW” position, start the
				unit. Once the engine attempts to start,
				slowly open the fuel valve.
	6.	Oil pressure switch or fuel shut-off	6.	Contact an Authorized Service Dealer.
		solenoid malfunction.
	7.	Connection to the LPG tank is loose.	7.	Hand-tighten connector to tank.
	8.	LPG fuel tank is empty or very low.	8.	Replace the LPG fuel tank.
	9.	Fuel valve is closed.	9.	Open the fuel valve.
	10.	Fuel valve opened to fast.	10.	Open the fuel valve slowly to equalize
				pressure in the tank(s).
	11.	LPG tank is not installed properly.	11.	Reinstall the LPG tank.
	12.	LPG tank components or hoses are dirty	12.	Replace LPG tank components or hoses.
		or damaged.
	13.	The throttle is not in the correct position.	13.	Be sure the throttle control is in the
				“SLOW” position.
	14.	Air cleaner is dirty.	14.	Clean or replace the air cleaner element.

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