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17
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
electrodes as necessary with a wire brush. The spark gap should be adjusted
to .025 in (0.6 to 0.7mm).
- Plug manufacturers recommend replacing the plug twice a year to avoid
unexpected plug failure in a job.
REPLACEMENT PLUG IS A NGK CMR7H.
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 with your hands until it is
tight, then tighten it a quarter turn more with a socket wrench.
MUFFLER
WARNING
Periodically inspect the muffler for loose fasteners, damage or corrosion.
If any sign of exhaust leakage is found, do not use the blower and have it
repaired immediately.
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 cylinder exhaust port at the same time.
2. Tighten all screws, bolts, and fittings.
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.
(1) Bolt (2) Bolt
(3) Spark Arrester (4) Diffuser
WARNING
- Before starting operation, always make sure to check if the muffler is
properly held by the bolts (2).
Fastening Torque: 8 to 12 N·m
- Also make sure that the spark arrester and the diffuser are properly
attached with the bolts (1). (Fastening Torque : 2 to 3 N·m)
AIR INLET NET
IMPORTANT
Blown air is taken in from the air inlet net. If the air flow drops during
operation, stop the engine and inspect the air inlet net for blockage by
obstacles.
- Note that failure to remove any such obstacles may result in the engine
becoming overheated and damaged.
(1)Net
WARNING
Never use the blower without the net on the blower. Before each use,
check that the net is attached in place and is free from any damage.
F19
(2)
(1)
(2)
(4)
(3)
F20
(1)
F21
Maintenance
150BT_US.fm Page 17 Friday, April 10, 2009 9:51 AM