F21
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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