Basic Engine Parts; Needle-Valve Location; Installation Of The Engine - O.S. engine MAX-46AXII Instruction Manual

BASIC ENGINE PARTS

Cylinder head
Carburetor
Throttle
Lever
Fuel inlet
Drive Hub
Propeller washer
Crankshaft
Propeller nut

INSTALLATION OF THE ENGINE

Installation in the model
A typical method of beam
mounting is shown below, left.
Rigid hardwood
(e.g. maple)
At least
At least
15mm(5/8")
15mm(5/8")
O.S. radial motor mount
For 46AX, 50SX, 40/46FX (Code No. 71913100)
Glowplug
Fuel inlet
Needle valve
Fuel outlet
Cover Plate
Silicone Tubing
Beam Mount
Crankcase
8
O.S. radial motor mount
(Available as an optional extra
part. See parts list)
9

NEEDLE-VALVE LOCATION

The procedure for relocating the needle-valve is as
follows:
1. Remove the two cover-plate screws which secure
the needle-valve assembly bracket, then carefully
remove the two screws by which the needle-valve
unit is attached to the bracket.
2. Rotate the needle-valve unit through 90˚ and re-
attach it to the bracket in the required position (see
sketch right ).
Note:
As self-tapping screws are used for unit
attachment, screw them in carefully so that screw
threads match those of the unit body precisely.
3. Finally, secure the complete assembly to rear cover
plate as before.
Cover plate Retaining Screw
Cover plate fitting holes
Needle-Valve
Assembly Bracket
Needle Valve unit
attachment screws
Make sure that the mounting beams are parallel and
that their top surfaces are in the same plane.
CORRECT
Front view
Top surfaces are in the same plane.
INCORRECT
Top surfaces are not
Opposite
in the same plane.
beam
Re-align the surfaces
as necessary
Needle Valve unit
Vertical position
(Factory position)
Side view
Top surfaces are not
in the same plane.
Engine does not rest firmly.