Craftsman 247.775890 Owner's Manual page 14

head, top of piston and around valves. Use a
soft brush to remove the deposits.
Reassemble gasket and cylinder head. Turn
screws down finger-tight. Torque cylinder head
screws in a staggered sequence to 165 in.-Ibs.
,_ WARNING: Temperature of muffler and
nearby areas may exceed 150 ° F(65°C).
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 16. Spark plug
replacement is recommended at the start of
each season. Refer to engine parts list for
correct spark plug type.
• Inspect periodically, and replace if necessary. If
your engine is equipped with a spark arrester
screen assembly, remove every 50 hours for
cleaning and inspection. Replace if damaged•
_lb WARNING: Always stop engine,
disconnect spark plug wire, and move it
away from spark plug before performing any
adjustments or repairs.
Lubrication
Lubricate the pivot points on the release bar, hopper
assembly, chute deflector and chipper chute once a
season using a light oil. See Figure 17.
Figure 16
NOTE: Do not sandblast spark plug. Spark plug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.
Muffler
WARNING: Do not operate the chipper-
shredder without a muffler, or tamper with
the exhaust system. Damaged mufflers or
spark arresters could create s fire hazard.
Figure 17
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