Troubleshooting - Toro VS-400 Operator's Manual

Troubleshooting

Problem
The engine will not start.
The engine lacks power or runs rough.
The belt slips or comes off the pulleys.
The eccentric rotates when the throttle of
the engine is in the idle position.
The eccentric do not rotate when the
throttle of the engine is in the run position.
The eccentric rotate slowly when the
throttle of the engine is in the run position.
Possible Cause
1. The fuel-valve lever is in the Off
position.
2. The choke is closed.
3. The choke is open.
4. The engine On/Off switch is in the Off
position.
5. The engine oil level is low (engines
with the oil-level switch).
6. The fuel tank is empty.
7. The engine contains bad/old fuel.
8. The spark plug is fouled or improperly
gapped.
9. The spark plug is wet with fuel (flooded
engine).
10. The spark-plug wire is loose or
disconnected.
1. The air filter is restricted.
2. The engine contains bad/old fuel.
3. There is water or contamination in the
fuel.
4. The fuel line is restricted.
5. The choke is closed
6. The spark plug is worn or has buildup
on the electrodes.
7. There is too much oil in the engine
crankcase.
1. The belt tension is insufficient.
2. The belt is worn.
3. The eccentric pulley or clutch is worn.
4. The eccentric pulley is misaligned to
the clutch.
1. The belt tension is not adjusted
correctly.
1. The belt tension is not adjusted
correctly.
2. The clutch is stuck.
1. The belt is worn.
2. The belt tension is not adjusted
correctly.
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Corrective Action
1. Move the fuel-valve lever to the On
position.
2. Open the choke when starting a hot
engine.
3. Close the choke when starting a cold
engine.
4. Rotate the switch to the On position.
5. Fill the engine, with the recommended
oil, to the proper level.
6. Fill the fuel tank with fresh fuel.
7. Drain the fuel tank and carburetor. Fuel
the machine with fresh gasoline.
8. Gap or replace the spark plug.
9. Remove the spark plug, dry it, and
install the plug. Start the engine with
the throttle in the Max position.
10. Remove the spark-plug wire, clean the
spark-plug terminal and the terminal
socket in the boot of the spark-plug
wire, and reinstall the spark-plug wire.
1. Clean or replace the air filter element(s).
2. Drain the fuel tank and carburetor.
Refuel with fresh gasoline.
3. Drain the fuel tank and carburetor. Fuel
the machine with fresh gasoline.
4. Clean the fuel filter and sediment cup.
5. Open the choke.
6. Check the electrode gap and adjust or
replace the spark plug.
7. Drain the oil to the proper level.
1. Adjust the belt tension.
2. Replace the belt.
3. Contact your Authorized Service
Dealer.
4. Align the pulley to the clutch.
1. Adjust the belt tension.
1. Adjust the belt tension.
2. Contact your Authorized Service
Dealer.
1. Replace the belt.
2. Adjust the belt tension.