Troubleshooting - Toro VS-70 Operator's Manual

Troubleshooting

Problem
The engine will not start.
The engine lacks power or runs rough.
The machine is not smoothing the
concrete properly.
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 fuel tank is empty.
6. The engine contains bad/old fuel.
7. The spark plug is fouled or improperly
gapped.
8. The spark plug is wet with fuel (flooded
engine).
9. 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. There is an excessive amount of
concrete buildup along the edges of
the board.
2. The operator is moving too slowly.
3. There is too much vibration for the type
of concrete.
4. The concrete is too high or low on one
side.
5. The board is not positioned 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 fuel tank with fresh fuel.
6. Drain the fuel tank and carburetor. Fuel
the machine with fresh gasoline.
7. Gap or replace the spark plug.
8. Remove the spark plug, dry it, and
install the plug. Start the engine with
the throttle in the Max position.
9. 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. Remove excessive concrete from the
board.
2. Move the screed at a faster pace.
3. Reduce engine speed and move the
screed at a faster pace.
4. Have workers shape the concrete as
close as possible to grade. Maintain
about 1 inch of concrete across the
front of the board at all times.
5. Reposition the board.