Install The Engine; Install A Glow Engine - GREAT PLANES Extra 300S ARF Instruction Manual

Install the Engine

Both gas and glow engines can be installed on this airplane
so two installations will be shown in this instruction book.
The first installation shown will be of an O.S.
(OSMG0661) glow engine. The second installation shown
will be of a Fuji BT-50SA (FJIG0050) gas engine. Both
engine installations are typical of engines of their respective
size and type. Follow this instruction manual step by step if
you are installing either of these engines. Use this
instruction manual as a guide if you are installing other
similar engines.
If you are installing a gas engine, skip the "Install a Glow
Engine" section and go to page 15, "Install a Gas Engine."

Install a Glow Engine

1. Cut the engine mount template from page 39. Use
spray adhesive or tape to temporarily attach the template to
the firewall. Align the template using the vertical and
horizontal lines stamped into the firewall. Drill 3/16" [4.8mm]
holes through the firewall at the marks.
2. Remove the engine mount template. Install four 8-32
blind nuts on the back of the firewall using one 8-32 x 1"
[25mm] SHCS and a #8 flat washer as shown. Use a small
amount of epoxy on the blind nuts to keep them in place. Do
not get epoxy in the threads.
® 1.60 FX
3. Find the left and right engine mounts and cut off the
spreader bar on both of them.
4. Mount the engine mount to the firewall with four 8-32
x 1" [25mm] SHCS, four #8 lock washers, and four #8 flat
washers into the four 8-32 blind nuts, but do not fully tighten
the bolts. Place the engine on the mount and adjust the
width of the mount to fit the engine. Center the molded-in
"tick" marks on both the top and bottom of 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
Threadlocker
5. Position the engine so that the face of the drive washer
is 7" [178 mm] from the firewall. Use a small clamp to hold
the engine at that position. A Great Planes Dead Center
Engine Mount Hole Locator (or your own method) works
well to mark the engine mount holes onto the engine mount.
Drill the engine mount at the marks with a #28 (0.136"
13
™ on the engine mount bolts.
™