Servicing The Spark Plug; Fuel System Maintenance; Emptying The Fuel Tank And Cleaning The Fuel Filter; Drive System Maintenance - Toro 22188 Operator's Manual

8. Install the new filter and hand tighten it 2/3
turn only.
9. Fill the crankcase to the Full line on the
dipstick with fresh oil Refer to Filling the
Crankcase with Oil.
10. Connect the wire to the spark plug.
11. Run the engine for about 3 minutes.
12. Stop the engine, wait for all moving parts to
stop, and check for oil leakage around the filter.
13. Add oil to compensate for the oil in the oil
filter. Refer to Checking the Engine Oil Level.
14. Recycle the used oil filter according to local
codes.

Servicing the Spark Plug

Check the spark plug after every 100 operating
hours. Use an NGK BPR5ES spark plug or
equivalent.
1. Stop the engine and wait for all moving parts
to stop.
2. Disconnect the wire from the spark plug
(Figure 12).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Important: Replace a cracked, fouled,
or dirty spark plug. Do not clean the
electrodes because grit entering the
cylinder can damage the engine.
5. Set the gap on the plug to 0.030 in. (0.76 mm)
(Figure 28).
Figure 28
1. 0.030 inches (0.76 mm)
6. Install the spark plug and the gasket seal.
7. Torque the plug to 17 ft-lb (23 N⋅m).
8. Connect the wire to the spark plug.
Fuel System
Maintenance
Emptying the Fuel Tank and
Cleaning the Fuel Filter
The fuel filter (screen) element is located inside
the fuel tank. Clean the fuel filter element every
100 operating hours.
1. Stop the engine and wait for it to cool down.
Important: Drain gasoline from a cold
engine only.
2. Disconnect the wire from the spark plug
(Figure 12).
3. Close the fuel valve (Figure 26).
4. Disconnect the fuel line by loosening the tube
clamp at the carburetor.
5. Open the fuel valve.
6. Drain the gasoline completely from the tank
and fuel line into an approved fuel container.
7. Remove the fuel tank from the mower.
8. Close the fuel valve.
9. Pour a small amount of fuel in the fuel tank,
move the fuel around in the tank, and pour it
out into an approved fuel container.
10. Install the fuel tank and fuel line; refer to
Installing the Fuel Tank and the Fuel Line.
Drive System
Maintenance

Adjusting the Self-propel

Drive

If the lawn mower does not self-propel or has a
tendency to creep forward when the control bar is
more than 1-1/2 inches (3.8 cm) from the handle,
adjust the wheel drive control knob on the rear of
the gear box.
1. Close the door in the lawn mower housing and
remove the grass bag.
2. Rotate the control knob clockwise a half turn
if the lawn mower does not self-propel. If the
lawn mower creeps forward, rotate the knob a
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