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9. Maintenance
■ INTAKE AIR COOLING VENT
•Never touch the cylinder, muffler, or spark
plugs with your bare hands immediately after
stopping the engine. The engine can
become very hot when in operation, and
doing so could result in severe burns.
•When checking the machine to make sure
that it is okay before using it, check the area
around the muffler and remove any wood
chips or leaves which have attached
themselves to the trimmer. Failing to do so
could cause the muffler to become
overheated, and that this in turn could cause
the engine to catch on fire. Always make
sure that the muffler is clean and free of
wood chips, leaves, and other waste before
use.
• Check the intake air cooling vent and the area
around the cylinder cooling fins after every 25
hours of use for blockage, and remove any
waste which has attached itself to the trimmer.
Note that it is necessary to remove the engine
cover shown in (MA10) in order to be able to
view the upper part of the cylinder.
• If waste gets stuck and causes blockage around
the intake air cooling vent or between the
cylinder fins, it may cause the engine to
overheat, and that in turn may cause mechanical
failure on the part of the trimmer. (MA7)
(1) cylinder
(2) intake air cooling vent (back)
■ PROCEDURES TO BE PERFORMED AFTER
EVERY 100 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 cylinder exhaust port at the same time.
(MA8)
2. Tighten all screws, bolts, and fittings.
3. Check to see if any oil or grease has worked its
way in between the clutch lining and drum, and if
it has wipe it away using oil-free, lead-free
gasoline.
IMPORTANT
WARNING
MA8
(1)
(2)
MA7
23