Repair instructions
Fine adjustment of idling speed T
•The idling speed is adjusted using the screw marked T.
•If adjustment is necessary, screw in the idling screw T until the chain starts to turn. Then screw it out until the chain stops moving.
•The idling speed is correctly set when the engine runs smoothly in all positions and there is a clear margin to the speed at which the chain starts to move.
High speed jet H
•The high speed jet H influences the saw power output and engine speed. If the H jet is set too weak the saw will
•Run the saw at full throttle for about 10 seconds. H=1.
•Then screw out the H screw 1/4 turn. H=1 1/4.
•Run the saw again at full throttle for about 10 seconds and listen to the difference in the engine note. Repeat this procedure again with the H screw screwed out another 1/4 turn. H=1 1/2.
•You have now run the saw at settings H ± 0, H = +1/4 and H = +1/2 from the factory setting. At full throttle the engine will sound different at each setting.
•The H screw is correctly adjusted when the saw “burbles” a little at full throttle without any load.
•If there is a lot of smoke from the silencer and the saw does not run smoothly then the setting is too rich.
•Screw in the H screw to the setting that sounds right.
NOTE!
For optimum adjustment, a tachometer should be used. The recommended maxi- mum speed should not be exceeded.
Carburettor – correct adjustment
•When the carburettor is correctly adjusted the saw should accelerate without hesitation and the engine will burble a little at full throttle without any load.
•The chain must not turn when idling.
•If the L screw is set too weak this can make the saw difficult to start and cause poor acceleration.
•If the H screw is set too weak the saw will produce less power, poor acceleration and there is a risk of engine damage.
•If either the L or H screws are set too rich it will cause acceleration problems or too low working speed.
Fuel tank – removal
WARNING!
The fuel used in chainsaws is harmful if inhaled, may cause skin irritation and is highly flam- mable.
1
Empty the fuel tank.
2
Remove the following:
•cylinder cover
•air filter
•clutch cover
•chain and guide bar
•starter assembly
•cable guide
3
Disconnect the fuel hose from the carburettor.
4
A
C
B
Disconnect the pushrod from the carburettor by first carefully prising up the spring over the end of the rod, where it connects to the throttle lever (A). Then press the throttle lever forwards (B) while pressing the throttle pushrod backwards (C) and lifting it off the lever. Withdraw the throttle pushrod from the tank and lift it upwards without pulling it through the rubber inlet manifold.
38 – English
