Troubleshooting - Toro hoverpro 400 Operator's Manual

Troubleshooting

Problem
The engine does not start.
The engine starts hard or loses power.
The engine runs rough.
The machine or engine vibrates
excessively.
There is an uneven cutting pattern.
Possible Cause
1. The wire is not connected to the spark
plug.
2. The fuel cap vent hole is plugged.
3. The spark plug is pitted, fouled, or the
gap is incorrect.
4. The fuel tank is empty or the fuel
system contains stale fuel.
1. The fuel cap vent hole is plugged.
2. The air filter element is dirty and is
restricting the air flow.
3. The underside of the machine housing
contains clippings and debris.
4. The spark plug is pitted, fouled, or the
gap is incorrect.
5. The engine oil level is too low, too high,
or excessively dirty.
6. The fuel tank contains stale fuel.
1. The wire is not connected to the spark
plug.
2. The spark plug is pitted, fouled, or the
gap is incorrect.
3. The air filter element is dirty and is
restricting the air flow.
1. The underside of the machine housing
contains clippings and debris.
2. The engine mounting bolts are loose.
3. The cutting disc bolt is loose.
1. You are mowing in the same pattern
repeatedly.
2. The underside of the machine housing
contains clippings and debris.
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Corrective Action
1. Connect the wire to the spark plug.
2. Clean the fuel cap vent hole or replace
the fuel cap.
3. Check the spark plug and adjust the
gap if necessary. Replace the spark
plug if it is pitted, fouled, or cracked.
4. Drain and/or fill the fuel tank with
fresh gasoline. If the problem persists,
contact an Authorized Service Dealer.
1. Clean the fuel cap vent hole or replace
the fuel cap.
2. Clean the air filter and/or replace the
air filter.
3. Clean under the machine housing.
4. Check the spark plug and adjust the
gap if necessary. Replace the spark
plug if it is pitted, fouled, or cracked.
5. Check the engine oil. Change the oil if
it is dirty; add or drain the oil to adjust
the oil level to the Full mark on the
dipstick.
6. Drain and fill the fuel tank with fresh
gasoline.
1. Connect the wire to the spark plug.
2. Check the spark plug and adjust the
gap if necessary. Replace the spark
plug if it is pitted, fouled, or cracked.
3. Clean the air filter and/or replace the
air filter.
1. Clean under the machine housing.
2. Tighten the engine mounting bolts.
3. Tighten the cutting disc bolt.
1. Change the mowing pattern.
2. Clean under the machine housing.