O.S. engine MAX-12CV Series Owner's Instruction Manual page 19

BALL LINK AND SLIDE VALVE EXTENSION
(In case of the 10C caburetor)
It is seldom necessary to separate the slide-valve
extension from the slide-valve itself. For cleaning,
withdraw this complete sub-assembly from the
carburetor body after removing the slide-valve guide
screw. Then wash with methanol or glow-fuel.
(Note: take care not to lose the guide screw;it is a
special one.)
When it is necessary to adjust the ball-link position,
loosen the ball-link retaining screw with a 2.5mm
hexagon key, re-align the ball-link and re-tughten the
screw firmly.
REALIGNMENT OF MIXTURE CONTROL VALVE
In the course of making carburetor adjustments, it is
just possible that the Mixture Control Valve may be
inadvertently screwed in or out too far and thereby
moved beyond its effective adjustment range.Its basic
position can be found by first rotating the Mixture
Control Valve until its slotted head is flush with the
carburetor body. The valve is then screwed in exactly
2.5 turn to re-establish its neutral position.
In case of the 10C caburetor
Carburettor Body
In case of the 10E-R caburetor
Throttle Lever
Carburettor Body
18
First rotate the Mixture Control
Valve until its slotted head is
flush with the carburetor body.
Then screw the valve in exactly
2.5 turn.
This is the standard position.
Mixture Control Valve
First rotate the Mixture Control
Valve until its slotted head is
flush with the carburetor body.
Then screw the valve in
exactly 0.5 turn.
This is the standard position.
Mixture Control Valve