Troubleshooting

Problem

 

Possible Cause

 

Corrective Action

 

 

 

 

 

Engine loses power

1.

Engine load is excessive

1.

Reduce the ground speed.

 

2.

Air cleaner is dirty.

2.

Clean or replace the air cleaner element.

 

3.

Oil level in the crankcase is low.

3.

Add oil to the crankcase.

 

4.

Cooling fins and air passages for the

4.

Remove the obstructions from the cooling

 

 

engine are plugged.

 

fins and air passages.

 

5.

Dirt in fuel filter.

5.

Replace the fuel filter.

 

6.

Dirt, water, or stale fuel is in the fuel

6.

Contact an Authorized Service Dealer.

 

 

system.

 

 

 

 

 

 

 

Mower pulls left or right (with levers fully

1.

Tire pressure in drive tires not correct.

1.

Adjust tire pressure in the drive tires.

forward)

 

 

 

 

 

 

 

 

 

Machine does not drive

1.

Drive release handle not in “operating”

1.

Position handle in “operating” position;

 

 

position.

 

see Drive Wheel Release Valves section

 

 

 

 

in Operation.

 

2.

Drive or pump belt is worn, loose or

2.

Change the belt.

 

 

broken.

 

 

 

3.

Drive or pump belt is off a pulley.

3.

Change the belt.

 

4.

Broken or missing idler spring.

4.

Replace the spring.

 

5.

Hydraulic fluid level is low or too hot.

5.

Add hydraulic fluid to reservoir or let it

 

 

 

 

cool down.

 

 

 

 

 

Uneven cutting height.

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.

Blade spindle bent.

6.

Contact an Authorized Service Dealer.

 

7.

Tips of adjacent blades are at an uneven

7.

Replace blades, spindles and (or) check

 

 

cutting height. Blades tips should be even

 

for damage to mower deck.

 

 

within 3/16 inch which is approximately

 

 

 

 

one blade thickness.

 

 

 

 

 

 

 

Abnormal vibration

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.

Loose engine pulley, idler pulley, or blade

4.

Tighten the appropriate pulley.

 

 

pulley.

 

 

 

5.

Engine pulley is damaged.

5.

Contact an Authorized Service Dealer.

 

6.

Blade spindle is bent.

6.

Contact an Authorized Service Dealer.

 

7.

Belt is damaged.

7.

Install new belt.

 

 

 

 

 

Blades do not rotate.

1.

Deck belt is worn, loose or broken.

1.

Install new deck belt.

 

2.

Deck belt is off pulley.

2.

Install belt on clutch and deck pulleys,

 

 

 

 

idlers, and tensioning idler per routing

 

 

 

 

decal on deck.

 

3.

Broken or missing idler spring.

3.

Replace the spring.

 

4.

Drive belt not routed correctly.

4.

Refer to belt routing decal on deck.

 

 

 

 

 

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Exmark 000 & higher, 312 manual See Drive Wheel Release Valves section

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