9. Maintenance
MA12
.025 in
0.655mm
■SPARK PLUG
•Starting failure and
•REPLACEMENT PLUG IS A NGK CMR7A.
IMPORTANT
•Note that using any spark plug 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.
TIGHTENING TORQUE:
■MUFFLER
WARNING
87~104 in-lbs (9.8~11.8 N.m.)
MA13
(1)
•Inspect periodically, the muffler for loose fasteners, any damage or corrosion. If any sign of exhaust leakage is found, stop using the machine and have it repaired immediately.
•Note that failing to do so may result in the engine catching on fire.
■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 Public Resources Code) to equip a spark arrester when a gas powered tool is used in any forest covered, brush covered, or grass covered unimproved land. (MA13)
