Mitox CS50 Manuel de l'opérateur télécharger pdf (Page 24)

CS45 / CS50 / CS56 Chainsaw

Original Instructions Version April 12

Adjusting the Carburettor

The carburettor has been factory adjusted, but may require ne tuning due to a change in operating

conditions. Before adjusting the carburettor, make sure that the provided air/fuel lters are clean and the fuel

properly mixed.

When adjusting, take the following steps:

Stop the engine and screw in both the H and L needles until they stop. Never force them. Then set them

back the initial number of turns as shown below.

H needle: 2+ or -¼

L needle: 2+ or -¼

1. Start the engine and allow it to warm up at half-throttle.

2. Turn the L needle (2) slowly to nd a position where

idling speed is at maximum, then set the needle back

a quarter (1/4) turn counter clockwise.

3. Turn the idle adjusting screw T (1) counter clockwise so

that the saw chain does not turn. If the idling speed is

too slow, turn the screw clockwise.

4. To verify the low speed you should be able to pull the

throttle in all the way and the engine should not die,

if it tries to die, open the L jet (2) slightly and re-adjust

idle if necessary.

5. Set the engine to full throttle, the H jet (3) is turned clockwise to reduce fuel, as the fuel mixture is

leaned out, the saw will run faster until it sounds as if it is screaming, at this point, turn the high

speed screw counter clockwise by quarter (1/4) turn to allow more fuel in.

A 2-cycle engine relies on the fuel mixture to cool the engine; a lean engine will run fast but can

overheat and may cause severe damage to the engine.

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Mitox CS50 Manuel de l'opérateur Page 24