20
Servicing the Spark Plugs
Check the spark plugs after every 200 operating hours.
Ensure that the air gap between the center and side
electrodes is correct before installing each spark plug. Use
a spark plug wrench for removing and installing the spark
plugs and a gapping tool/feeler gauge to check and adjust
the air gap. Install new spark plugs if necessary.
Type: Champion Premium Gold 2071 or Champion
RC12YC (or equivalent) Air Gap: 0.030 in. (0.76 mm)
Removing the Spark Plug
s
1. Stop the engine and remove the key.
2. Pull the wires off of the spark plugs (Fig. 29).
3. Clean around the spark plugs.
4. Remove the spark plugs and metal washers.
m–3876
1
2
Figure 29
1.
Spark plug wire
2.
Spark plug
Checking the Spark Plugs
1. Look at the center of the spark plugs (Fig. 30). 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 plugs. Always replace
the spark plugs when they have a black coating, worn
electrodes, an oily film, or cracks.
2. Check the gap between the center and side electrodes
(Fig. 30).
3. Bend the side electrode (Fig. 30) if the gap is not
correct.
0.030 in.
(0.76 mm)
2
3
1
m–3215
Figure 30
1.
Center electrode insulator
2.
Side electrode
3.
Air gap (not to scale)
Installing the Spark Plug
s
1. Thread the spark plugs into the spark plug holes.
2. Tighten the spark plugs to 20 ft-lb (27 N.m).
3. Push the wires onto the spark plugs (Fig. 29).
Replacing the Fuel Filter
Replace the fuel filter yearly. Never install a dirty filter.
1. Stop the engine and remove the key.
2. Shut off the fuel valve under fuel tank.
3. Clamp the fuel line between the fuel tanks and the fuel
filter to block the fuel flow.
4. Squeeze the ends of the hose clamps together and slide
them away from the filter (Fig. 31).
1
Figure 31
1.
Filter
