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Check for fuel leakage and loose fastenings and damage to major parts, especially handle joints and
guide bar mounting.
If any defects are found, make sure to have them repaired before operating the saw again.
6.2- Periodical service points
6.2.1- Cylinder fins
Dust clogging between the cylinder fins will cause overheating of
the engine.
Periodically check and clean the cylinder fins after removing the
air cleaner and the cylinder cover.
Remove sawdust between the cylinder fins.
Clean the volute area
When re-assembling, make sure that switch wires and grommets are positioned correctly in place.
Note: make sure to cover the air intake hole.
6.2.2- Fuel filter
(a) Using a wire hook, take out the filter from the filler port.
(b) Disassemble the filter and wash with gasoline, or replace with
new one if clogged with dirt completely (or if needed).
Notes- When returning the filter, use a pinch not to be folded the suction pipe.
When assembling the filter, take care not to allow filter fibers or dust inside the suction pipe.
6.2.3- Oil filter
1. With a wire hook, take out the oil filter from the feeding port.
2. Wash the filter with gasoline.
Notes- When putting the filter back into the tank, make sure that it comes to the front right corner.
Also clean off dirt in the tank.
6.2.4- Spark plug
Clean the electrodes with a wire brush and reset the gap to 0.65 mm as
necessary.
6.2.5- Sprocket
Check for cracks and for excessive wear interfering with the chain
drive. If the wear is considerable, replace it with new one.
Never fit a new chain on a worn sprocket, or a worn chain on a new
sprocket.
6.2.6- Way of the cooling air
WARNING - The engine metal parts can burn your skin. Never touch the cylinder, muffler or
ignition plug etc. during operation or right after stopping the engine.
- Before starting the engine, check around the muffler and take off sawdust.
If you do not, it will cause the overheating and a fire.
For preventing the trouble, please keep clean around the muffler.
This engine is air-cooled. Dust clogging between the inlet port of the cooling air and cylinder fins
will cause overheating of the engine. Periodically check and clean the cylinder fins after removing
the air cleaner and the cylinder cover.
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