Craftsman 247.77586 manual Fins, Spark Plug, Feeler Gauge zrk Plug Figure

theenginewithoutaircleanercompletelyassembled. ToServiceAir Cleaner:

1.	Service pre-cleaner	after every 25 hours of use,	L
	or at least once a season.
2.	Service filter every	100 hours of use, or at least	Fins
	once a season.

3.Service pre-cleaner and filter more often under dusty conditions.

-Remove wing nut and cover.

•Slide pre-cleaner off filter. Clean the inside of base and cover thoroughly.

NUT

PAPER FOAMFILTER(IF SO EQUIPPED)

Figure 13

Clean pre-cleaner as follows:

a.Wash in water and detergent solution, and squeeze (do not twist) until all dirt is removed.

b.Rinse thoroughly in clear water.

c.Wrap in a clean cloth and squeeze (do not twist) until completely dry, or allow to air dry.

d.Saturate with engine oil and squeeze (don't twist) to distribute oil and remove excess oil.

NOTE: If the pre-cleaner is torn or damaged in any way, replace it.

•If necessary, replace paper filter (do not attempt to clean). Install new filter on base.

•Slide pre-cleaner over filter.

•Install cover and wing nut.

°Tighten wing nut securely. Clean Engine

•Clean engine periodically. Remove dirt and debris with a cloth or brush.

°Frequently remove grass clippings, dirt and debris from cooling fins, air intake screen and levers and linkage. This will help ensure adequate cooling and correct engine speed. See figure 14

Figure 14

Yearly or every 25 hours, whichever occurs first, remove the blower housing and clean the areas shown in figure 14 to avoid overspeeding, overheating and engine damage. Clean more often if necessary.

NOTE: Cleaning with a forceful spray of water is not recommended as water could contaminate the fuel

system.

nearbyWARNING:areas Temperaturemayexceed 150°of mufflerF(65°C)and. Avoid these areas.

Spark Plug

Clean the spark plug and reset the gap to .030" at least once a season or every 50 hours of operation. See figure 15. Spark plug replacement is recommended at the start of each season. Refer to engine parts list for correct spark plug type.

.030" Feeler Gauge

zrk Plug

Figure 15

NOTE: Do not sandblast spark plug. Spark plug should be cleaned by scraping or wire brushing and washing with a commercial solvent.

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