52
FC 75, FC 85, FH 75, FS 75, FS 80, FS 85, HL 75, KM 85, KW 85
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 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,
turn the puller over so that its
VA
932RA316
1
2
open side faces the carburetor
body. Pry off the limiter cap.
Removing long limiter cap
:
Use suitable pliers to pull off the
limiter cap.
– Screw down the high speed
screw (
H
) and low speed screw
(
L
) clockwise until they are
VA
932RA315
1
against their seats.
Carrying out basic setting
– Open the high speed screw (
H
)
1 1/2 turns counterclockwise.
– Open the low speed screw (
L
)
one full turn counterclockwise.
VA
932RA317
H
L
9.4.4
Service Adjustment, Carburetor with Limiter Cap
