O.S. engine MAX-75AX Instruction Manual page 9

How to fasten the mounting screws.
Hardwood mounting beams
Tighten second nut
3mm steel nuts firmlydown onto first nut.
Spring washer or
lock washer
15mm min.
15mm min.
Radial motor mount (cast aluminum)
3.5mm
steel Allen screw
THROTTLE LINKAGE
Before connecting the throttle to its servo,
make sure that the throttle arm and linkage
safely clear any adjacent part of the airframe
structure, etc., as the throttle is opened and
closed. Connect the linkage so that the throttle
is fully closed when the transmitter throttle
stick and its trim lever are at their lowest
settings and fully open when the throttle stick
is in its fully-open position. Carefully align the
appropriate holes in the throttle arm and servo
horn so that they move symmetrically and
smoothly through their full travel.
●
Tighten this nut first.
Hardwood such as
cherry or maple.
Steel washer
3mm steel screw
Spring washer
16
17
Make sure that these mounting beams are
accurately aligned and firmly integrated with
the airframe, reinforcing the adjacent
structure to absorb vibration. Use 4mm or
larger steel screws, preferably Allen type
hexagon socket head cap screws, with
washers and locknuts, for bolting the engine
to the bearers.
O.S. Radial Motor Mount
A special O.S. radial motor mount (Code
No.71905200) is available, as an optional
extra, for use where firewall type mounting is
required.