O.S. Engines 50SX - Manual (Page 11)

Hardwood mounting beams
O.S. radial motor
mount
(cast aluminum)
How to fasten the mounting screws.
Make sure that the mounting beams are parallel and
that their top surfaces are in the same plane.
Front view Side view
Top surfaces
are not in the
same plane.
Opposite
beam Top surfaces
are not in the
same plane.
Re-align the surfaces
as necessary
Engine does not
rest firmly.
CORRECT INCORRECT
Top surfaces are in
the same plane.
Tighten second
nut firmly down
onto first nut.
Tighten this
nut first.
Steel washer
3-4mm
steel screw
Spring
washer or
lock washer
Hardwood such
as cherry or maple.
Spring
washer
3.5mm steel
Allen screw
3-4mm steel nuts
Use mounting screws of a diameter
(between 3mm and 4mm) appropriate
to engine size (see table left).
Mounting Screw Size
50SX, 40 ¡ 46FX
61 ¡ 91FX
3mm
4mm
INSTALLATION OF THE ENGINE
Rigid hardwood
(e.g. maple)
At least
15mm(5/8") At least
15mm(5/8")
O.S. radial motor mount
(Available as an optional extra
part. See parts list) A typical method of beam
mounting is shown below, left.
Installation in the model
50SX
40
¡ 46FX
61 ¡ 91FX
For 50SX, 40/46FX(Code No. 71913100)
For 60FP, 61 ¡ 91FX(Code No. 71905200)
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