Troubleshooting - Toro 74915 Operator's Manual

Troubleshooting

Problem
Starter does not crank
Engine will not start, starts hard, or fails
to keep running
Engine loses power.
Engine overheats.
Mower pulls left or right (with levers fully
forward)
Possible Cause
1. Blade control switch (PTO) is engaged.
2. Parking brake is not on.
3. Drive levers are not in neutral lock
position.
4. Operator is not seated.
5. Battery is dead.
6. Electrical connections are corroded or
loose.
7. Fuse is blown.
8. Relay or switch is defective.
1. Fuel tank is empty.
2. Fuel shutoff valve is closed.
3. Oil level in the crankcase is low.
4. The throttle and choke are not in the
correct position.
5. Dirt in fuel filter.
6. Dirt, water, or stale fuel is in the fuel
system.
7. Air cleaner is dirty.
8. Seat switch is not functioning properly.
9. Electrical connections are corroded,
loose or faulty.
10. Relay or switch is defective.
11. Faulty spark plug.
12. Spark plug wire is not connected.
1. Engine load is excessive.
2. Air cleaner is dirty.
3. Oil level in the crankcase is low.
4. Cooling fins and air passages above
the engine are plugged.
5. Vent hole in the fuel cap is plugged.
6. Dirt in the fuel filter.
7. 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 above
the engine are plugged.
1. Tracking needs adjustment
2. Tire pressure in drive tires not correct.
62
Corrective Action
1. Move blade control switch (PTO) to
disengaged.
2. Set the parking brake.
3. Ensure the drive levers are in the
neutral lock position.
4. Sit on the seat.
5. Charge the battery.
6. Check the electrical connections for
good contact.
7. Replace fuse.
8. Contact an Authorized Service Dealer.
1. Fill the fuel tank.
2. Open the fuel shutoff valve.
3. Add oil to the crankcase.
4. Be sure the throttle control is midway
between the "SLOW" and "FAST"
positions, and the choke is in the "ON"
position for a cold engine or the "OFF"
position for a warm engine.
5. Replace the fuel filter.
6. Contact an Authorized Service Dealer.
7. Clean or replace the air cleaner
element.
8. Check the seat switch indicator.
Replace seat if needed.
9. Check the electrical connections
for good contact. Clean connector
terminals thoroughly with electrical
contact cleaner, apply dielectric grease
and reconnect.
10. Contact an Authorized Service Dealer.
11. Clean, adjust or replace spark plug.
12. Check the spark plug wire connection.
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. Clean or replace the fuel cap.
6. Replace the fuel filter.
7. 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. Adjust the tracking.
2. Adjust tire pressure in the drive tires.