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F21
40
English
9. Maintenance
IMPORTANT
• Note that using any spark plugs other than those
designated may result in the engine failing to
operate properly or in the engine becoming
overheated and damaged.
• To install the spark plug, first turn the plug until it is
finger tight, then tighten it a quarter turn more with a
socket wrench.
■ MUFFLER
WARNING
• Inspect periodically, the muffler for loose fasteners,
any damage or corrosion. If any sign of exhaust
leakage is found, do not use the blower and have it
repaired immediately.
• Note that failing to do so may result in the
engine catching on fire.
IMPORTANT
• Before starting operation, always make sure to
check if the muffler is properly held by three bolts
(F21 (2)). (Fastening Torque : 8 to 12 N·m)
• Also make sure that the speak arrester and the
diffuser are properly attached with four bolts (F21
(1)). (Fastening Torque : 2 to 3 N·m)
• Even if one of seven bolts is loose, it may result in
engine catching on fire.
(1) Bolt
(2) Bolt
(3) Spark arrester
(4) Diffuser
■ SPARK ARRESTER
• The muffler is equipped with a spark arrester to
prevent red hot carbon from flying out of the exhaust
outlet. Periodically inspect and clean as necessary
with a wire brush. In the State of California it is
required by law (Section 4442 of the California Pulic
Resources Code) to equip a spark arrester when a
gas powered tool is used in any forest covered, bush
covered, or grass covered unimproved land.
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