Stihl 4137 Series, Руководство пользователя, Страница: 43 / 58

42 Series 4137 Components - HT
Erratic idling behavior
– Idle setting is too rich . Turn the
low speed screw ( L ) clockwise
(about a quarter turn) until the
engine runs and accelerates
smoothly.
It is usually necessary to change the
setting of the idle speed screw (
LA )
after every correction to the low
speed screw (
L ).
The limiter cap has to be removed
from the high speed screw (
H ) only
if it is necessary to replace the high
speed screw (
H ), clean the
carburetor or adjust it from scratch.
After removing the limiter cap it is
necessary to carry out the basic
setting.
Removing caps on version with
short limiter cap
:
Push puller (2) 5910 890 4501,
open side facing you, between
the limiter cap (1) and carburetor
body and pry the cap off. If the
limiter cap is stuck on the screw,
VA
932RA316
1 2
turn the puller over so that its
open side faces the carburetor
body. Pry off the limiter cap.
Removing caps on version with
long limiter cap
:
Use suitable pliers to pull off the
limiter cap.
– Carefully screw down the high
speed screw ( H ) and low speed
VA
932RA315
1
screw ( L ) clockwise until they are
against their seats.
Carrying out basic setting
– Check the air filter and replace if
necessary.
– Check the spark arresting screen
or replace if necessary,
b
5.4
– Check chain tension.
– check throttle cable adjustment
(where fitted) and adjust if
necessary,
b
8.4
– Mount the bar and chain.
– Allow the engine to warm up.
9.4.4 Service Adjustment,
Carburetor with Limiter
Cap