Operator's Manual

36
1
2
m–4811
Figure 48
1. Spark plug wire 2. Spark plug
Checking the Spark Plug
1. Look at the center of the spark plug(s) (Fig. 49). If you
see light brown or gray on the insulator, the engine is
operating properly. A black coating on the insulator
usually means the air cleaner is dirty.
Important Never clean the spark plug(s). Always
replace the spark plug(s) when it has: a black coating,
worn electrodes, an oily film, or cracks.
2. Check the gap between the center and side electrodes
(Fig. 49). Bend the side electrode (Fig. 49) if the gap is
not correct.
0.030 inch
(0.76 mm)
2
3
1
m–3215
Figure 49
1. Center electrode insulator
2. Side electrode
3. Air gap (not to scale)
Installing the Spark Plug(s)
1. Install the spark plug(s). Make sure the air gap is set
correctly.
2. Tighten the spark plug(s) to 20 ft-lb (27 N⋅m).
3. Push the wire(s) onto the spark plug(s) (Fig. 48).
Servicing the Fuel Filter
Replace the fuel filter after every 100 operating hours or
yearly, whichever occurs first.
Replacing the Fuel Filter
Never install a dirty filter if it is removed from the fuel
line.
1. Allow the machine to cool down.
2. Set the parking brake, stop the engine, remove the key,
and wait for all moving parts to stop before leaving the
operating position.
3. Close the fuel shut–off valve (Fig. 50).
2
1
Figure 50
1. Fuel filter 2. Fuel shut-off valve
4. Squeeze the ends of the hose clamps together and slide
them away from the filter (Fig. 50).
5. Remove the filter from the fuel lines.
6. Install a new filter and move the hose clamps close to
the filter (Fig. 50).
7. Wipe up any spilled fuel.
8. Open fuel shut-off valve (Fig. 50).