Troubleshooting – Exmark 4500-370 User Manual
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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 adjustments 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. Blade(s) not sharp.
1. Sharpen the blade(s).
2. Cutting blade(s) is/are bent.
2. Install new cutting blade(s).
3. Mower deck is not level.
3. Level mower deck from side-to-side and
front-to-rear.
4. Underside of mower is dirty.
4. Clean the underside of the mower.
5. Tire pressure in drive tires not correct.
5. Adjust tire pressure in the drive tires.
6. Spacers are in wrong location.
6. Position spacers under hairpins.
Uneven cutting height.
7. Tips of adjacent blades are at an uneven
cutting height. Blades tips should be even
within 3/16 inch which is approximately
one blade thickness.
7. Replace blades, spindles and (or) check
for damage to mower deck.
1. Cutting blade(s) is/are bent or unbalanced.
1. Install new cutting blade(s).
2. Blade mounting bolt is loose.
2. Tighten the blade mounting bolt.
3. Engine mounting bolts are loose.
3. Tighten the engine mounting bolts.
4. Engine pulley is damaged.
4. Contact an Authorized Service Dealer.
Abnormal vibration.
5. Blade spindle is bent.
5. Contact an Authorized Service Dealer.
1. PTO belt is worn, loose, or broken.
1. Check belt tension or replace belt
2. PTO shaft is not connected.
2. Connect PTO shaft.
Blades Do Not rotate.
3. PTO belt is off pulley.
3. Check belt for damage. Install belt and
check adjusting shafts and belt guides for
correct position.
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