Basic Setting - Stihl MS 341 Shop Manual

12.5

Basic Setting

The limiter caps have to be
removed from the adjusting screws
only if it is necessary to replace the
high speed screw (H) or low speed
screw (L), clean the carburetor or
carry out the basic setting.
Perform the two following
operations:
After removing the limiter cap it is
necessary to carry out the basic
setting.
1
: Turn the limiter cap (1) of high
speed screw (H) counter-
clockwise as far as stop until the
limiter cap lugs are in line with the
carburetor openings.
: Turn the limiter cap (2) of low
speed screw (L) clockwise as far
as stop. Turn the limiter cap back
one quarter turn until its lugs are
in line with the carburetor
openings.
Note:
The lugs of the limiter caps are at a
right angle to the screwdriver slot.
MS 341, MS 361, MS 361 C
: Insert puller 5910 890 4500 in
center of limiter caps, apply slight
pressure and screw home
counterclockwise until the limiter
caps come out of the carburetor
body.
1
2
– Screw down both adjusting
screws until they are against their
seats.
On MS 341
– Open the high speed screw (H)
(1) one full turn.
– Open the low speed screw (L) (2)
one full turn.
On MS 361
– Open the high speed screw (H)
(1) one full turn.
– Open the low speed screw (L) (2)
one full turn.
Adjusting engine idle speed
– Check the air filter and clean or
replace as necessary.
– Check chain tension.
– Warm up the engine.
Adjust idle speed with a tachometer.
Adjust specified engine speeds
within tolerance of +/- 200 rpm.
2
1. Adjust engine speed with idle
speed screw (LA) to 3,300 rpm.
2. Turn low speed screw (L)
clockwise or counterclockwise
to obtain maximum engine
speed.
If this speed is higher than
3,700 rpm, abort the procedure and
start again with step 1.
3. Use the idle speed screw (LA)
to set engine speed again to
3,300 rpm.
4. Set the engine speed to
2,800 rpm with the low speed
screw (L).
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