O.S. Engines 9B Carb - 29381010 - Manual (Page 2)

Ratchet spring
Silicone tubing
Remote needle holder
Model or fitting plate
carburettor periodically. Using the wrench supplied, remove the
needle-valve holder from the carburettor body and wash out the
interior to remove any minute particles that may have escaped
through the filters.
REALIGNMENT OF MIXTURE CONTROL SCREW
The Mixture Control Screw is factory set at the approximate best
position. If, however, the Mixture Control Screw has been
tampered with, or moved accidentally, set it at the original position
as follows. Screw in the Mixture Control Screw until it stops while
keeping the rotor fully closed. Then. unscrew 2-1/2 turns. This is the
original position of the Mixture Control Screw.
Needle Control Lever
By fitting the Needle Control Lever (supplied) to the needle knob,
the needle-valve can be adjusted by radio-control. Before fitting the
Lever, remove the needle ratchet spring.
Type 9B Remote-mounting Needle Valve Assembly
This is an optional extra part. It enables the Needle Valve to be
installed separately from the engine in a position where (especially
with a cowled or enclosed engine) it may be more accessible for
adjustment. (See sketch.) Install as follows:
• Remove the needle-valve holder from the carburettor and fit the
plug screw in its place.
• Drill a 6mm dia. hole in the required position on the model and
insert the Remote Needle Valve Assembly. If necessary, install a
suitable mounting plate in the model to which the Remote
Needle Valve Assembly may be fitted.
• For piping, use heavy-duty silicone tubing of at least 2mm bore
and 5mm outer diameter. Tube length should be kept as short as
possible.
• You may also use the Needle Control Lever in conjunction with
the Remote-mounting Needle Valve Assembly.
PARTS LIST
Description
Needle Control Lever
Needle Valve Assembly
Needle
"0" Ring(2pcs.)
Set-Screw
Needle Valve Holder Assembly
Ratchet Spring
Carburettor Body
Carburettor Rubber Gasket
Rotor Spring
Carburettor Rotor
Carburettor Insert
Mixture Control Screw
"0" Ring(2pcs.)
Throttle Lever Assembly
Fuel Inlet
Carburettor Fixing Screw
Rotor Guide Screw
The specifications are subject to alteration (or improvement without notice.
Set-screw
Needle knob
Needle-valve control lever
Plug screw
Remote needle holder
Needle
Fixing nut
28282300
28281900
28281970
24981837
26381501
27381940
26711305
28281110
29315000
28281500
28281200
28281210
28281300
27881820
28281400
22681953
24925202
28281600
Dirt and librous matter mostly
accumulate here Remove this with an 8mm wrench
6-15 3-Chome Imagawa Higashisumiyoshi-ku
Osaka 546-0003. Japan TEL. (06)6702-0225
FAX (06)6704-2722