9. Maintenance
FUEL FILTER
•A clogged fuel filter may cause poor acceleration of the engine. Check periodically to see if the filter is clogged with dirt. The filter can be taken out of the fueling port using a small wire hook. Disconnect the filter assembly from the fuel pipe and unhook the re- tainer to disassemble it. Clean the components with gasoline.
SPARK PLUG
•The spark plug may gather carbon deposits on its firing end with reasonable use. Remove and inspect the spark plug every 25 hours and clean the elec- trodes as necessary with a wire brush. The spark gap should be adjusted to .025 in (0.6~0.7mm).
•Plug manufacturers recommend replacing the plug twice a year to avoid unexpected plug failure in a job.
REPLACEMENT PLUG
HB2302 : CHAMPION RCJ6Y (noise proof)
HBZ2602 : NGK CMR7H (noise proof)
IMPORTANT
•Note that using any spark plugs other than those des- ignated 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.
HB2302 / HBZ2602
MUFFLER |
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WARNING |
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• Inspect periodically, the muffler for loose fasteners, | G | |
any damage or corrosion. If any sign of exhaust leak- | B | |
age is found, do not use the blower and have it re- |
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paired immediately. |
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•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 to the cyl- inder. (Fastening Torque : 8~12 N·m)
•Even if one bolt out of three bolts is loose, the muffler may get loose during operation which may result in engine catching on fire.
PROCEDURES TO BE PERFORMED AFTER EV- ERY 50 HOURS OF USE
1.Remove the muffler, insert a screwdriver into the vent, and wipe away any carbon buildup. Wipe away any carbon buildup on the muffler exhaust vent and cylin- der exhaust port at the same time.
2.Tighten all screws, bolts, and fittings.
SPARK ARRESTER
•The engine is equipped with a spark arresting screen at the exhaust port. Periodically check and keep it in good condition. In the state of California it is required by law (Section 4442 of the California Public Re- sources Code) to equip a spark arrester when a gas powered tool is used in any forest covered, brush covered, or grass covered unimproved land.
