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Troubleshooting – Exmark Lazer Z Mower 4500-645 User Manual

Page 53

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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

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

position.

3. Ensure the drive levers are in the neutral

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

or faulty.

5. Check the electrical connections for

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.

Starter does not crank

8. Faulty module.

8. Replace module.

1. Engine oil level is low.

1. Check and add oil if necessary.

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

vapor tank.

4. Remove tank and replace with an Exmark

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

solenoid malfunction.

6. Contact an Authorized Service Dealer.

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

or damaged.

12. Replace LPG tank components or hoses.

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.

Engine will not start, starts hard, or fails to
keep running

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