Troubleshooting - Toro 74251 Operator's Manual

Troubleshooting

Problem
Starter does not crank
Engine will not start, starts
hard, or fails to keep
running.
Engine loses power.
Possible Cause
1. Blade control (PTO) is
engaged.
2. Parking brake is not on.
3. Operator is not seated.
4. Battery is dead.
5. Electrical connections
are corroded or loose.
6. Fuse is blown.
7. Relay or switch is
defective.
1. Fuel tank is empty.
2. Air cleaner is dirty.
3. Spark plug wire is loose
or disconnected
4. Spark plug(s) is pitted,
fouled, or the gap is
incorrect.
5. Dirt in the fuel lter.
6. 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 ns and air
passages above the
engine are plugged.
5. Spark plug(s) is pitted,
fouled, or the gap is
incorrect.
6. Cracked mufer of
broken Oxygen sensor.
7. Dirt in the fuel lter.
8. Dirt, water, or stale fuel
is in the fuel system.
58
Corrective Action
1. Move blade control
(PTO) to disengaged.
2. Set the parking brake.
3. Sit on the seat.
4. Charge the battery.
5. Check the electrical
connections for good
contact.
6. Replace fuse.
7. Contact an Authorized
Service Dealer.
1. Fill fuel tank with fuel.
2. Clean or replace the air
cleaner element.
3. Install wire(s) on the
spark plug(s).
4. Install new, correctly
gapped spark plug(s).
5. Contact an Authorized
Service Dealer.
6. 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 ns and
air passages.
5. Install new, correctly
gapped spark plug(s).
6. Contact an Authorized
Service Dealer.
7. Contact an Authorized
Service Dealer.
8. Contact an Authorized
Service Dealer.