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Troubleshooting
Problem
The engine does not start, starts hard, or
fails to keep running.
The engine loses power.
The engine overheats.
The machine does not drive.
There is abnormal vibration.
Possible Cause
1. The fuel tank is empty or the shutoff
valve is closed.
2. A spark-plug wire is loose or
disconnected.
3. A spark plug is pitted, fouled, or the
gap is incorrect.
4. The air cleaner is dirty.
5. Dirt is in the fuel filter.
6. Dirt, water, or stale fuel is in the fuel
system.
7. The gap between the safety-interlock
switches is not correct.
1. The engine load is excessive.
2. The air cleaner is dirty.
3. The oil level in the crankcase is low.
4. The cooling fins and air passages
under the engine blower housing are
plugged.
5. A spark plug is pitted, fouled, or the
gap is incorrect.
6. The vent hole in the fuel cap is plugged.
7. Dirt is in the fuel filter.
8. Dirt, water, or stale fuel is in the fuel
system.
1. The engine load is excessive.
2. The oil level in the crankcase is low.
3. The cooling fins and air passages
under the engine blower housing are
plugged.
1. The hydraulic-fluid reservoir is low.
2. Air is in the hydraulic system.
3. A pump-drive belt slips.
4. A pump-drive belt idler spring is
missing.
5. The pump-bypass valves are open.
1. The engine-mounting bolts are loose.
2. An engine pulley is loose.
3. An engine pulley is damaged.
49
Corrective Action
1. Fill the fuel tank with gasoline and
open the valve
2. Install the wire on spark plug.
3. Install a new, correctly gapped spark
plug.
4. Service the air-cleaner element.
5. Replace the fuel filter.
6. Contact an Authorized Service Dealer.
7. Contact an Authorized Service Dealer.
1. Reduce the ground speed.
2. Service the air cleaner element.
3. Add oil to the crankcase.
4. Remove the obstruction from the
cooling fins and air passages.
5. Install a new, correctly gapped spark
plug.
6. Clean or replace the fuel cap.
7. Replace the fuel filter.
8. Contact an Authorized Service Dealer.
1. Reduce the ground speed.
2. Add oil to the crankcase.
3. Remove the obstruction from the
cooling fins and air passages.
1. Add hydraulic fluid to the reservoir.
2. Bleed the air out the hydraulic system.
3. Replace the pump drive belt.
4. Replace the pump drive belt idler
spring.
5. Tighten the bypass valves. Torque to
12 to 15 N∙m (9 to 11 ft-lb).
1. Tighten the engine-mounting bolts.
2. Tighten the appropriate pulley.
3. Contact an Authorized Service Dealer.
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