Carburetor

Ill!lI Functioning, Basic setting, Final setting

~ WARNING,!DOnot startthe sawwithoutthe bar, chain and clutch cover (chain brake) assembled. If you do, the clutch might come

loose and cause severe injuries.

Functioning

,The carburett~r governs the engine speed via the throttle trigger. In the carburetor, air/fuel is mixed. This air/fuel mixture is adjustable. If you want to take advantage of the maximum

output of the engine, the setting must be correct.

●The setting of the carburetor means that the engine is adjusted to local conditions, for example climate, altitude, petrol and type of two-stroke oil.

●The carburetor has three adjustment possibilities: L=Low speed needle

H=High speed needle

T=Idle speed adjustment screw

✎The fuel quantity required in proportion to the airflow the throttle trigger level allows is adjusted by means of the L- and H-needles. Turning the needles clockwise gives a leaner fuel mixture (less fuel), turning them counter-clockwise gives a richer fuel mixture (more fuel). A lean mixture gives higher rpm:s and a rich one lower rpm:s.

NOTE: Your unit is equipped with limiter caps, do not attempt to adjust the needles beyond the stop as damage can occur.

●The idling speed screw T regulates the position of the throttle lever in the idling speed position. Turn the idling speed screw clockwise gives a higher idling speed, turn it counter-clockwise a lower idling speed.

Basic setting

●The carburetor is adjusted to a basic setting when the saw is tested at the factory. The basic setting is richer than the optimum setting and shall be maintained during the first working hours. Thereafter, do

the final setting of the carburetor. The basic setting can vary between: H=2-118to 2-7/8 turn respectively L=l-1/2 to 2-1/4 turn.

NOTE! If the chain rotates in the idling position, turn the idling speed screw counter-clockwise until the chain stops.

Final setting

● After the “breakin” period(about5 hours),thefinalsettingisto bedone.This setting isdoneto ensurethatyourunitis running at peak performance and producing the least amount of harmful emissions.Have the final aetting done by quali- fied servicepersonnel.This serviceis not coveredby war- rantv.

First’,adjust the low speed needle L, then the high speed needleH, and finally the idlingspeedscrewT. The carbure- tor shouldbe set accordingto the followingRPM limits:

Max. speed(no Ioad)=l3,000 rpm Idlingspeed=2800/3200rpm

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Conditions

●Before all settings are done the air filter must be clean and the cylinder cover mounted.

“Set the needles marked T, L, and H to the mid point of the limiter cap,

●Start the saw according to the starting instructions and warm it

up during 10 minutes.

NOTE! if the chain rotates in the idling position, turn the idling speed screw counter-clockwise until the chain stops.

D Put the saw on a flat surface, the bar pointing in the opposite direction of you. Avoid that bar and chain get into contact with

the surface or other objects.

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