Maintenance
29
Checking the Spark Plug
1. Look at the center of the spark plug(s) (Fig. 21).
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. 21). Bend the side electrode
(Fig. 21) if the gap is not correct.
0.030 in.
(0.76 mm)
2
3
1
m–3215
Figure 21
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. 20).
Greasing and Lubrication
Lubricate the machine when shown on the CHECK
SERVICE REFERENCE AID decal (Fig. 22). Grease
more frequently when operating conditions are
extremely dusty or sandy.
Grease Type: General-purpose grease.
How to Grease
1. Disengage the power take off (PTO) and turn the
ignition key to “OFF” to stop the engine.
Remove the key.
2. Clean the grease fittings with a rag. Make sure to
scrape any paint off the front of the fitting(s).
3. Connect a grease gun to the fitting. Pump grease
into the fittings until grease begins to ooze out of
the bearings.
4. Wipe up any excess grease.
Where to Add Grease
Lubricate the grease fittings as shown on the CHECK
SERVICE REFERENCE AID decal (Fig. 22).
Figure 22
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