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To change the oil, proceed as follows:

1.  Run the engine until it is thoroughly warmed up 

then shut OFF the engine.

2.  Immediately after the engine shuts OFF, pull the 

oil drain hose (Figure 4.3) free of its retaining 
clip. Remove the cap from the hose and drain the 
oil into a suitable container.

3.  After the oil has drained, replace the cap onto the 

end of the oil drain hose. Retain the hose in the 
clip.

4.  Refill with the proper recommended oil (see 

Section 4.3.1). See Section 1.6.2 for oil capaci-
ties.

Oil Filter

Oil Drain Hose

Change the engine oil filter as follows:

1.  With the oil drained, remove the old oil filter by 

turning it counterclockwise.

2.  Apply a light coating of clean engine oil to the 

gasket of the new filter. See Section 1.6.1 for rec-
ommended filter.

3.  Screw the new filter on by hand until its gasket 

lightly contacts the oil filter adapter. Then, tighten 
the filter an additional 3/4 to one turn (Figure 
4.3).

4.  Refill with the proper recommended oil (see 

Section 4.3.1). See Section 1.6.2 for oil capaci-
ties.

5.  Start the engine and check for leaks.

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See Figure 1.3, for the location of the air cleaner. Use 
the following procedure (Figure 4.4):

1.  Turn the two screws counterclockwise to loosen.
2.  Remove the cover and air filter.
3.  Wipe away dust or debris from inside of the air 

box and around edges.

4.  Install the new air cleaner into the air box.
5.  Install the cover. Turn the two cover screws clock-

wise to tighten.

See the “Service Schedule,” Section 4.13, for air 
cleaner maintenance. See Section 1.6.1 for air filter 
replacement part number.

Screw

Cover

Filter

Reset the spark plug gaps or replace the spark plugs 
as necessary. See Section 4.13 for maintenance 
requirements.

1.  Clean the area around the base of the spark plugs 

to keep dirt and debris out of the engine. Clean 
by scraping or washing using a wire brush and 
commercial solvent. Do not blast the spark plugs 
to clean.

2.  Remove the spark plugs and check the condition. 

Replace the spark plugs if worn or if reuse is 
questionable. See Section 4.13 for recommended 
inspection.

3.  Check the spark plug gap using a wire feeler 

gauge. Adjust the gap to 0.76 mm (0.030 inch) 
by carefully bending the ground electrode (Figure 
4.5).