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head, top ofpiston 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 toengine parts listfor
correct spark plugtype.
• Inspect periodically, and replace ifnecessary. If
your engine isequipped with a spark arrester
screen assembly, remove every 50 hours for
cleaning and inspection. Replace ifdamaged•
_lb WARNING: Alwaysstop engine,
disconnect spark plug wire, and move it
away from spark plug before performing any
adjustments or repairs.
Lubrication
Lubricatethe pivot pointson 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
shouldbe cleaned by scraping or wire brushing and
washing witha commercial solvent.
Muffler
WARNING: Do not operate the chipper-
shredder without a muffler, or tamper with
the exhaust system. Damaged mufflersor
spark arresters could create s fire hazard.
Figure 17
14