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Change Oil Filter
Replace the oil filter every 200 hours or every other oil
change.
Note: Change oil filter more frequently when operating
conditions are extremely dusty or sandy.
1. Drain the oil from the engine; refer to
Changing/Draining Oil, page 31.
2. Remove the old filter (Fig. 28).
3. Apply a thin coat of new oil to the rubber gasket on
the replacement filter (Fig. 28).
1
Figure 28
1. Oil filter
4. Install the replacement oil filter to the adapter. Turn
the oil filter clockwise until the rubber gasket contacts
the filter adapter, then tighten the filter an additional
3/4 turn (Fig. 28).
5. Fill the crankcase with the proper type of new oil;
refer to Changing/Draining Oil, page 31.
Spark Plug
Check the spark plug(s) after every 100 operating hours.
Make sure the air gap between the center and side
electrodes is correct before installing the spark plug. Use a
spark plug wrench for removing and installing the spark
plug(s) and a gapping tool/feeler gauge to check and
adjust the air gap. Install a new spark plug(s) if necessary.
Type: NGK BPR5ES (or equivalent) Air Gap: 0.030 in.
(.75 mm)
Removing the Spark Plug
1. Disengage the power take off (PTO), set the parking
brake, and turn the ignition key to "OFF" to stop the
engine. Remove the key.
2
m–4288
2. Adapter
(s)
32
2. Pull the wire(s) off the spark plug(s) (Fig. 29). Now
clean around the spark plug(s) to prevent dirt from
falling into the engine and potentially causing damage.
3. Remove the spark plug(s).
1
Figure 29
1. Spark plug wire installed
Checking the Spark Plug
Clean or replace spark plug and set gap every 100 hours.
1. Look at the center of the spark plug(s) (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
Always replace the spark plug(s) when it
has a black coating, worn electrodes, an oily film, or
cracks.
2. Clean the electrode by scraping or with a wire brush to
remove carbon deposits and wetness.
3. Check the gap between the center and side electrodes
(Fig. 30). Bend the side electrode (Fig. 30) if the gap is
not correct.
2
m–4294
2. Spark plug
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