Carburetor Adjustment; Basic Setting - Stihl TS 420 Manual

Low speed adjustment screw
: Take out the low speed screw (1).
: Examine the tip (arrow) for signs
of damage or wear. Fit a new low
speed adjusting screw L if
necessary.
– Turn the low speed adjusting
screw L in as far as possible.
– Continue with the high speed
adjusting screw.
90
High speed adjustment screw
1
: Prise the limiter cap (1) off the
high speed screw with tool
5910 890 4501.
Always fit a new limiter cap.
: Take out the high speed
screw (1).
: Examine the setting cone (1) for
signs of damage or wear. Fit a
new high speed adjusting screw if
necessary.
– Turn the high speed adjusting
screw H in as far as possible.
1
– Make the basic setting,
b 12.4.1.
12.4

12.4.1 Basic setting

Only necessary if the high speed
screw H or low speed screw L has
to be replaced or for cleaning and
setting the carburetor.
– Remove the limiter cap from the
high speed screw, b 12.3.8.
The basic setting must be made
after removing the limiter cap.
1

Carburetor adjustment

TS 410, TS 420