Great Planes Venus 40 ARF - GPMA1025 - Manual (Page 15)

This airplane can use a wide variety of engines. This
installation will show the installation of an O.S.
® .46 FX. The
procedure for installing other engines will be similar except
for minor variations. The engine can be installed at different
angles. On the instruction’s model the engine was installed
inverted because that is the position that requires the least
cutting of the cowl.
Note: If you use a short engine such as the O.S. .40 L.A.,
you will need to use the engine spacing template on the
back cover page to cut two 1/4" [6.4mm] plywood spacers
to be glued on the firewall. You will also need to substitute
6-32 x 1-1/4" [32mm] SHCS for the 6-32 x 3/4" [19mm] SHCS
included with this kit.
❏
1. Cut the engine mount template from the back cover
page. Use spray adhesive or tape to temporarily attach the
template to the firewall. Align the template using the vertical
and horizontal lines of the firewall. Drill 5/32" [4mm] holes
through the firewall at the marks.
❏
2. Install four 6-32 blind nuts into the holes on the back
of the firewall. Use a small amount of epoxy on the blind nuts
to keep them in place. Do not get epoxy in the threads.
❏
3. Find the left and right engine mounts and cut off the
spreader bar on both of them.
❏
4. Remove the engine mount template. Mount the engine
mount to the firewall with four 6-32 x 3/4" [19mm] SHCS,
four #6 flat washers, and four #6 lock washers into the four
6-32 blind nuts, but do not fully tighten the SHCS. Place the
engine on the mount and adjust the width of the mount to fit
the engine. Center the molded-in “tick” marks on the engine
mount with the marks on the firewall and tighten the mounting
bolts. It would be a good idea to use some Great Planes Pro
Thread Locking Compound on the engine mount bolts.
❏
5. Position the engine so that the face of the drive washer
is 4-15/16" [125mm] from the front of the fuse. Use a Great
Planes Dead Center Engine Mount Hole Locator or your
own method to mark the engine mount holes onto the
engine mount. Drill the engine mount at the marks with a
#36 (7/65" [2.8mm]) drill bit. Use a 6-32 tap to thread the
hole for the engine bolts.
❏
6. Install the engine using four 6-32 x 3/4" [19mm] SHCS,
four #6 flat washers, and four #6 lock washers.
Engine Installation
15