small piece of ply through the large hole in the firewall to allow the engine to move around to
position it. Put the screw through this wood piece, through the large hole in the firewall, and
into the engine spacer so that the wood spacer is snug against the firewall but will still slide
around.
Now mount the cowl using the supplied
screws and washers. If you are using a
single cylinder engine it will be neces-
sary to cut out the cowling to clear the
cylinder to mount the cowl. Cut a little
bit at a time rechecking clearance until
the cowl will fit over and mount on the
cowl.
Mount the cowl using the supplied
screws and washers. Place your spinner
back plate over the crankshaft or prop
bolt so that it is centered. You can now
just move the engine around by hand
(reach in from behind the engine) to get
the spinner back plate centered on the
cowl face.
Once the spinner back plate and engine
are in the right position, remove the
cowl and remove the engine from the
wood block/spacer which should remain
in place. You can now drill straight
through the holes from the wood screws
to drill the engine’s actual mounting
holes in the firewall.
The final step is to install blind nuts be-
hind the firewall and fine adjust the en-
Note these
pictures show
this technique
on another
plane, please
do not attempt
to mount a 3w
106 twin on
this plane.
