16
Mount the Engine
The process for mounting a 4-stroke and a 2-stroke are the
same, but most of the instructions show a 4-stroke. Where
necessary or helpful, photos and notes for installing a 2-stroke
are also provided.
❏
1. Mount a fl at stick or the back plate of your spinner to
the engine. Hold one of the engine mounts to the engine
sliding it along the engine until the distance between the
back of the engine mount and the back of the spinner will
be 4-3/4" [120mm].
❏
2. Holding the mount to the engine, mark one of the holes
in the engine onto the engine mount – a Great Planes
Dead-
Center Hole Locator
is indispensable for this.
You can fasten the engine to the mount with the included M3
x 25 cap screws and M3 nuts, or drill and tap M3 threads
into the mount so no nuts will be required.
❏
3. If using nuts, drill a 1/8" [3.2mm] hole through the mark
made in the previous step. If you are going to tap 3mm
threads, drill a 2.4mm (or 3/32") hole through the mark – in
either case, use a drill press if you have access to one to
ensure the hole is perpendicular to the surface of the mount.
If you don’t have a drill press, do your best to hold the drill
vertically so the hole will be perpendicular.
❏
4. If tapping threads, use a 3mm tap to thread the hole – if
care is used you can chuck the tap in a hand drill to make
the procedure easier and faster.
❏
5. Fasten the engine mount to the engine with an M3 x 25
cap screw, an M3 lock washer and fl at washer and an M3
nut (if you didn’t tap threads). Mark the location of the other
engine mount bolt hole onto the mount.
❏
6. Remove the mount from the engine. Drill the 2
nd
hole
in the mount and fasten the mount back onto the engine.
❏
7. Position the other mount half on the other side of the
engine and mark and drill the holes the same way, then fasten
the mount to the engine.
❏
8. If using an O.S. FS .72 or .46AX, cut the appropriate
Engine Mount Template
from the back of the instruction
manual. If using a different engine, place your engine over
the templates to see if one of them happens to match the
mount hole spacing for the engine mounts on your engine.
