Troubleshooting - Toro 74891 Operator's Manual

Troubleshooting

Problem
The starter does not crank.
Engine does not start, starts hard, or fails
to keep running
The engine loses power.
The engine overheats.
The mower pulls left or right (with levers
fully forward).
Possible Cause
1. The blade-control switch (PTO) is
engaged.
2. The parking brake is not on.
3. The drive levers are not in
N -L position.
EUTRAL OCK
4. The operator is not seated.
5. The battery is dead.
6. The electrical connections are
corroded or loose.
7. The fuse is blown.
8. The 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. 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
above the engine are plugged.
5. The vent hole in the fuel cap is plugged.
6. There is dirt in the fuel filter.
7. There is 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
above the engine are plugged.
1. The tracking needs adjustment
2. The tire pressure in drive tires not
correct.
50
Corrective Action
1. Move the blade-control switch (PTO)
to disengaged.
2. Set the parking brake.
3. Ensure that the drive levers are in the
N -L position.
EUTRAL OCK
4. Sit on the seat.
5. Charge the battery.
6. Check the electrical connections for
good contact.
7. Replace the 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 S and F
LOW
and the choke is in the O
a cold engine or the O
FF
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 the tire pressure in the drive
tires.
positions,
AST
position for
N
position for a