8
TV 3540 • TV 4040
EN
clockwise.
B. When the saw chain has proper tension, hold
nose of bar in the uppermost position and
tighten the 2 bar retaining nuts securely.
CAUTION:
A new saw chain stretches,
requiring adjustment after as few as 5 cuts. This
is normal with a new chain, and the interval be-
tween future adjustments will lengthen quickly.
CAUTION:
If the saw chain is too loose
or too tight, the sprocket, bar, chain, and crank-
shaft 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).
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, op-
erator’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 in-
tended measure of protection if the saw is op-
erated carelessly. Always test the chain brake
before using your saw and periodically while on
the job.
To test the chain brake:
1. The chain brake is disengaged (chain can
move) when the brake lever is pulled back and
locked
(Fig. 7A)
.
2. The chain brake is engaged (chain is stopped)
when the brake lever is in forward position.
You should not be able to move the chain
(Fig. 7B)
.
NOTE:
The brake lever should snap into both po-
sitions. If strong resistance is felt, or lever does
not move into either position, do not use your
saw. Take it immediately to SPARKY professional
service centre for repair.
VI - Fuel and lubrication
FUEL
Use regular grade unleaded gasoline mixed with
SPARKY 40:1 custom 2-cycle engine oil for best
results. Use mixing ratios in section FUEL MIXING
TABLE.
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:
If 2-cycle lubricant other
than SPARKY Custom Lubricant is to be used,
it must be 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 recommend-
ed mixing ratio of 100:1. If insufficient lubrica
-
tion is the cause of engine damage, it voids the
manufacturer’s engine warranty for that occur-
rence.
MIXING FUEL
Mix fuel with SPARKY brand 2 cycle oil in an ap-
proved container. Refer to the Fuel mixing table
for correct ratio of fuel to oil. Shake container to
ensure thorough mix.
WARNING:
Lack of lubrication voids
engine warranty.
Gasoline and Oil Mix
40:1
Oil Only
FUEL MIXING TABLE
Gasoline
SPARKY Custom Lubricant
Litres
Litres
cm
3
1
0,025
25
2
0,050
50
3
0,075
75
5
0,125
125
10
0,250
250
Mixing Proportion 40 parts gasoline to 1 part
lubricant
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