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Figure 41
1. Foam element
5. When servicing the foam element, check the condition
of the paper element. Clean it by gently tapping it on a
flat surface or replace it if needed.
6. Install the foam element, paper element, wing nut, and
air-cleaner cover.
Important: Do not operate the engine without the
air cleaner element because extreme engine wear
and damage will likely result.
Changing the Engine Oil and
Filter
Service Interval: After the first 25 hours—Change the
engine oil and filter.
Every 100 hours
1. Remove the drain plug
into a drain pan. When the oil stops, install the drain
plug.
Figure 42
1. Drain plug
2. Paper element
(Figure
42) and let the oil flow
2. Oil filter
2. Remove the oil filter
3. Apply a light coat of clean oil to the new filter gasket.
4. Screw the filter on by hand until the gasket contacts the
filter adapter, then tighten it 3/4 to 1 turn further. Do
not overtighten it.
5. Add oil to the crankcase; refer to
Oil (page
23).
6. Dispose of the oil filter and used oil properly.
Replacing the Spark Plugs
Service Interval: Every 800 hours
The recommended air gap is 0.76 mm (0.030 inch)
The correct spark plug to use is a Champion RC 14YC.
Note: The spark plug usually lasts a long time; however,
remove and check the plugs whenever the engine
malfunctions.
1. Clean the area around the spark plugs so foreign matter
cannot fall into the cylinder.
2. Pull the wires off of the spark plugs and remove the
plugs.
3. Check the condition of the side electrode, center
electrode, and center electrode insulator to ensure that
there is no damage.
Important: Replace a cracked, fouled, dirty, or
otherwise malfunctioning spark plug. Do not sand
blast, scrape, or clean electrodes by using a wire
brush because grit may eventually release from the
plug, fall into the cylinder, and damage the engine.
4. Set the air gap between the center and side of the
electrodes at 0.76 mm (0.030 inch)
5. Install the correctly-gapped spark plug with a gasket
seal, and tighten the plug to 23 N∙m (200 in-lb). If you
do not have a torque wrench, tighten the plug firmly.
37
(Figure
42).
Checking the Engine
(Figure
43).
Figure 43
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