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Caution: if saw chain is too loose or too tight, the sprocket, bar, chain, and
crankshaft bearings will wear more rapidly. Study Fig. 6 for information
concerning correct cold tension (A), correct warm tension (B), and as a
guide for when saw chain needs adjustment (C).
8.3.6
Chain brake mechanical test
Your chain saw is equipped with a chain brake that reduces possibility of injury due to
kickback. The brake is activated if pressure is applied against brake lever when, as in the
event of kickback, operator's hand strikes the lever. When the brake is actuated, chain
movement stops abruptly.
Warning: the purpose of the chain brake is to reduce the possibility of
injury due to kickback; however, it cannot provide the intended measure of
protection if the saw is operated carelessly. Always test the chain brake
before using your saw and periodically while on the job.
8.3.7
To test chain brake:
▪
The chain brake is disengaged (chain can move) when brake lever is pulled back and
locked. Be sure the chain brake latch is in the off position (Fig. 7a).
▪
The chain brake is engaged (chain is stopped) when brake lever is in forward position and
the chain brake latch is in the on position. You should not be able to move chain (Fig. 7b).
Note: the brake lever should snap into both positions. If strong resistance
is felt, or lever does not move into either position, do not use your saw take
it immediately to a professional service centre for repair.
9 FUEL AND LUBRICATION
9.1
Fuel
Use regular grade unleaded gasoline mixed with 40:1 custom 2-cycle engine oil for best
results. Use mixing ratios in section fuel mixing table below.
Warning: never use straight gasoline in your unit. This will cause
permanent engine damage and void the manufacturer's warranty for that
product. Never use a fuel mixture that has been stored for over 90 days.
Warning: 2-cycle lubricant must be a premium grade oil for 2-cycle air
cooled engines mixed at a 40 : 1 ratio. Do not use any 2-cycle oil product
with a recommended mixing ratio of 100:1. If insufficient lubrication is the
cause of engine damage, it voids the manufacturer's engine warranty.
9.2
Mixing fuel
Add oil to an approved fuel container followed by the gasoline to allow incoming gasoline to
mix with oil. Shake container to ensure thorough mix.
Warning: Lack of lubrication voids engine warranty. Gasoline and oil must
be mixed at 40:1
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