Troubleshooting - Toro 30986 Operator's Manual

Troubleshooting

Problem
Engine will not start, starts hard, or fails
to keep running.
Engine loses power.
Engine overheats.
Machine does not drive.
Abnormal vibration.
Uneven cutting height.
Possible Cause
1. Fuel tank is empty.
2. Fuel shut off valve is closed.
3. Choke is not on.
4. Air cleaner is dirty.
5. Spark plug wire is loose or
disconnected.
6. Spark plug is pitted, fouled, or the gap
is incorrect.
7. Dirt in the fuel filter.
8. Dirt, water, or stale fuel is in the fuel
system.
1. Engine load is excessive.
2. Air cleaner is dirty.
3. Oil level in the crankcase is low.
4. Cooling fins and air passages under
the engine blower housing are plugged.
5. Spark plug is pitted, fouled, or the gap
is incorrect.
6. Vent hole in the fuel cap is plugged.
7. Dirt in the fuel filter.
8. Dirt, water, or stale fuel is in the fuel
system.
1. Engine load is excessive.
2. Oil level in the crankcase is low.
3. Cooling fins and air passages under
the engine blower housing are plugged.
1. Shift lever is in neutral.
2. Traction belt is worn, loose or broken.
3. Traction belt is off a pulley.
4. Broken or missing idler spring.
1. Cutting blade(s) is/are bent or
unbalanced.
2. Blade mounting bolt is loose.
3. Engine mounting bolts are loose.
4. Loose engine pulley, idler pulley, or
blade pulley.
5. Engine pulley is damaged.
6. Blade spindle is bent.
1. Blade(s) not sharp.
2. Cutting blade(s) is/are bent.
3. Mower is not level.
4. Underside of mower is dirty.
5. Tire pressure is not correct.
6. Blade spindle bent.
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Corrective Action
1. Fill fuel tank with gasoline.
2. Open the fuel shut off valve.
3. Move the throttle lever to choke
position.
4. Clean or replace the air cleaner
element.
5. Install wire on spark plug.
6. Install a new, correctly gapped spark
plug.
7. Replace the fuel filter.
8. Contact an Authorized Service Dealer.
1. Reduce the ground speed.
2. Clean 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. Move the shift lever to a drive gear
position.
2. Change the belt.
3. Change the belt.
4. Replace the spring.
1. Install new cutting blade(s).
2. Tighten the blade mounting bolt.
3. Tighten the engine mounting bolts.
4. Tighten the appropriate pulley.
5. Contact an Authorized Service Dealer.
6. Contact an Authorized Service Dealer.
1. Sharpen the blade(s).
2. Install new cutting blade(s).
3. Level the mower from side-to-side and
front-to-rear.
4. Clean the underside of the mower.
5. Adjust the tire pressure.
6. Contact an Authorized Service Dealer.