O.S. Engines 20C Carb - 23481000 - Manual (Page 4)

INSTALLATION
After fitting the engine in the helicopter, please observe the following recommendations when linking the throttle servo to the
carburettor.
CORRECT-Throttle lever movement should be
disposed symmetrically, as shown.
Locate the servo so that its output arm and the
throttle pushrod are, as closely as possible, di-
rectly in line with the carburettor's throttle arm, as
shown.
Fully closed
position
Note: If differential throttle movement is required, make necessary
adjustment at the servo output arm, not at the throttle lever.
When the throttle is fully open or fully closed, the
throttle lever angle should not be more than 45° either
side of the mid-point of its travel (and where it is at a
90° angle to the pushrod), otherwise throttle rotor move-
ment may become inhibited or may even lock up.
Also, some lubricants may affect the throttle rotor
movement.
Please note that the throttle lever angles of the O.S.
Type 20C carburettor are well within these limits-
requiring only 75° from the fully open to fully closed
positions.
INCORRECT -One-way throttle lever movement should not
be more than 45°. \
Use outer hole.
Fully open
position
PARTS LIST
Description
Throttle Lever Assembly
Throttle Lever Fixing Screw
Throttle Lever
Throttle L e v e r
Carburettor Rotor
Mixture Control Valve Spring
Rotor Spring
Carburettor Body
"0" Ring
Rotor Guide Screw
Fuel Inlet (w/Gasket)
Carburettor Rubber Gasket
Carburettor Fixing Screw
Needle Valve Assembly
Needle Valve Holder
Ratchet Spring
Needle
"0" Ring
Set Screw
The specifications are subject to alteration for improvement without notice.
Code No
23481400
22781420
22781410
22781411
23481200
23481650
26781506
23481100
24881824
45581820
22681953
22615000
23081706
27681900
27381940
26711305
27681970
24981837
26381501
6-15 3-chome Imagawa Higashisumiyoshi-ku
Osaka 546, Japan. TEL (06) 702-0225
FAX. (06) 704-2722
© Copyright 1994 by O S Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan. 60130270-39708