Carburetor Adjustment; Basic Adjustment; Final Adjustment - Husqvarna 50 Workshop Manual

Carburetor Adjustment

Never start the saw without the bar, chain and chain
brake installed. Due to the rapid acceleration and
deceleration of the engine, the clutch could come
loose and cause severe injuries.
Ensure that the air filter and fuel filter are clean before
making carburetor adjustments. The carburetor adjusting
screws are located on the right side of the saw and are
identified as follows: L = low speed mixture screw,
H = high speed mixture screw and T = idle (throttle)
speed screw.

Basic Adjustment

Before attempting to perform a running adjustment, first
make a basic adjustment of the L and H mixture screws.
Rotate the L and H mixture screws in (clockwise) until
lightly seated.
Damage to the mixture screw tips and tip seats may
result if the screws are over tightened.
Now open (counterclockwise rotation) each mixture
screw one full turn.

Final Adjustment

A suitable two-stroke single cylinder tachometer
such as the one supplied by Husqvarna P/N
5027114-01 must be used to ensure correct engine
operating rpm's preventing possible unnecessary
and costly engine damage.
Start the saw and allow the engine to reach normal
operating temperature. If necessary, adjust screw 'T' so
that an engine idle rpm of 2500-2800 is achieved. The
saw chain must not rotate at engine idle.
WARNING !
NOTE !
NOTE !
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