O.S. Engines 65LA - Manual (Page 9)

INSTALLATION
How to fasten the mounting screws.
Hardwood mounting beams
O.S. radial motor mount
(cast aluminum)
Tighten second nut firmly
down onto first nut.
Tighten this nut first.
Steel washer
3.5mm steel screw
(40-46LA)
4mm(65LA)
Spring washer or
lock washer
Hardwood such as
cherry or maple.
Spring washer
3mm steel Allen screw
Front view
CORRECT
Side view
Top surfaces are in the
same plane.
Re-align the surfaces
as necessary
INCORRECT
Top surfaces are not
in the same plane.
Opposite beam
Top surfaces
are not in the
same plane.
Engine does
not seat firmly.
Rigid hardwood
(e.g. maple)
Installation in the model
A typical method of beam
mounting is shown below,left. O.S. radial motor mount
(Available as an optional extra part.
See parts list)
Make sure that the mounting beams are parallel
and that their top surfaces are in the same plane.
At least
12mm(1/2")40-46LA
15mm(5/8")65LA
At least
12mm(1/2")
3mm steel nuts
(40-46LA)
4mm(65LA)
8