21
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Maintenance and Storage
How to Replace the Saw (continued)
Periodical service points
7. While holding up the tip of the bar, adjust the chain tension by turning the tensioner screw until
the chain engages in the bar channel.
When tensioned correctly it should be possible to pull one full chain link free of the bar channel
with ease.
8. Tighten the nuts securely finger tight. Then check the chain for smooth rotation and proper
tension while moving it by hand. If necessary, loosen the chain cover.
9. Tighten the tensioner nuts.
NOTE!
A new chain will expand its length during the first period of use. Check and re-adjust the
tension frequently as a loose chain can easily derail or cause rapid wear of itself and the chain
bar.
CAUTION!
If the saw chain is TOO LOOSE or TOO TAUT, the Vdrive wheel, chain bar, chain and
crank shaft bearing will suffer premature wear. FIG 8 shows the correct tension A (when cold)
and tension B (when warm). FIG C shows a chain that is too loose.
1. Start assembly
2. Fan cover
3. Fan
4. Cylinder fins
5. Engine cover
1. Air cooling system
Dust clogging around the cooling system and the cylinder fins will cause overheating of the engine.
Periodically check and clean the cooling system and the cylinder fins with a brush after removing
the cylinder cover, the air cleaner and the recoil case. When installing the cylinder cover and the
cooling system, make sure that switch wires and grommets are positioned correctly in place.
NOTE!
Be sure to unblock the air intake hole.
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