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6. Fill the crankcase with the correct type of new oil;
refer to Changing the Engine Oil, steps 8 through 10.
7. Dispose of the used oil filter at a certified recycling
center.
Changing the Spark Plugs
Service Interval: Every 200 hours
Type: Champion RC-12YC (or equivalent)
Air Gap: 0.030 inch (0.76 mm)
Make sure the air gap between the center and side
electrodes is correct before installing the spark plugs.
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.
Removing the Spark Plug
1. Set the parking brake, stop the pump, stop the
engine, and remove the ignition key.
2. Release the latch on the back of the seat and lift the
seat forward.
3. Pull the wires off the spark plugs (Figure 49).
4. Clean around the spark plugs to prevent dirt from
falling into the engine and potentially causing
damage.
5. Remove the spark plugs and metal washers.
1. Spark plug wire
Checking the Spark Plugs
1. Look at the center of the spark plugs (Figure 50).
If you see a light brown or gray coating on the
insulator, the engine is operating properly. A black
Figure 49
2. Spark plug
coating on the insulator usually means the air cleaner
is dirty.
Important: Do not clean the spark plugs.
Always replace a spark plug when it has a black
coating, worn electrodes, an oily film, or cracks.
2. Check the gap between the center and side electrodes
(Figure 50) and bend the side electrode, if the gap
is not correct.
1. Center electrode insulator
2. Side electrode
Installing the Spark Plugs
1. Install the spark plugs and metal washers.
2. Tighten the spark plugs to 18 to 22 ft-lb (24.4 to
29.8 N-m).
3. Push the wires onto the spark plugs (Figure 49).
4. Close and latch the seat.
44
Figure 50
3. Air gap (not to scale)
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