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2. Slowly pour approximately 80% of the specified
amount of oil into the fill port (Figure 28).
3. Add additional oil to bring the oil level to the proper
fill amount; refer to (Figure 28).
4. Install the oil cap/dipstick (Figure 28).
Servicing the Spark Plug
Service Interval: Every 100 hours/Every 6 months
(whichever comes first)—Check the
spark plug.
Every 300 hours/Yearly (whichever comes
first)—Replace the spark plug.
Note: Use a 5/8 inch spark plug wrench for removing and
installing the spark plug.
Removing the Spark Plug
1. Turn off the engine Stopping the Engine (page 14)and
place the machine in the resting position (Figure 14).
2. Ensure that the machine surfaces are cool.
3. Remove the top cover.
4. Pull the spark-plug wire off the terminal of the spark
plug (Figure 29).
Figure 29
1. Spark plug
5. Clean around the spark plug.
6. Rotate the spark plug counterclockwise using a 5/8
inch spark-plug wrench to remove the plug and sealing
washer.
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2
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2. Wire
Checking the Spark Plug
Note: Use a gapping tool/feeler gauge to check and adjust
the air gap. Install a new spark plug if necessary.
Air Gap: 0.6 to 0.7 mm (0.024 to 0.028 inch)
Spark plug type: CM5H (NKG), CMR5H (NGK), or
equivalent
1. Look at the center of the spark plug (Figure 30). If you
see light brown or gray on the insulator, the engine is
operating properly.
Important: Never clean the spark plug. Always
replace the spark plug when it has a black coating,
worn electrodes, an oily film, or cracks.
1
1. Side electrode
2. Center electrode
2. Use a gapping tool for spark plugs or a feeler gauge to
measure the gap between the side electrode and center
electrode (Figure 30).
3. If the measured gap is not within the specified range,
do the following:
A. If the gap is too small, carefully bend the side
electrode away from the center electrode until the
gap between the electrodes is within the measured
air gap range.
B. If the gap is too large, carefully bend the side
electrode toward from the center electrode until
the gap between the electrodes is within the
measured air gap range.
Installing the Spark Plug
Important: Ensure that the gap between the side and
center electrodes is correct before installing the spark
plug.
1. Thread the spark plug clockwise into the spark-plug
hole by hand.
Note: Avoid cross threading the spark plug with the
threads of the spark-plug hole.
2. Rotate spark plug clockwise using a 5/8 inch spark-plug
wrench until the plug and sealing washer are seated.
3. Tighten the plug as follows:
20
2
3
4
G019300
Figure 30
3. Insulator
4. 0.6 to 0.7 mm (0.024 to
0.028 inch) gap
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