❏ 2. Turn over the firewall and draw two straight
lines from the outer punch marks. Note: These
lines are used for locating the engine on the
firewall.
❏ 3. Drill four 7/32" holes at the punch marks.
❏ 4. Laminate the two die-cut 1/8" ply engine
mounts, creating the engine mount spacer.
❏ 5. Glue the engine mount spacer to the firewall,
centering it on the lines you made on the firewall.
❏ 6. Drill four 7/32" holes through the engine
mount
spacer, using the holes in the firewall as a guide.
❏ 7. Using a hammer, gently tap the 8-32 blind
nuts into the back of the firewall. Glue the blind
nuts in the firewall with thin CA.
❏ 8. Loosely mount the Great Planes 60 - 120
engine mount to the engine mount
spacer/firewall
with four 8-32 x 1-1/4" socket head cap screws and
#8 washers. Slide the mount halves to the widest
position, then tighten the mount to the firewall.
❏ 9. Position the engine on the engine mount so
that the spinner backplate is 6-7/8" from the
firewall. Note: Do not confuse the engine mount
spacer with the firewall.
❏ 10. Mount the engine to the mount with 8-32 x
3/4" socket head cap screws, confirming the 6-7/8"
measurement from the firewall to the spinner
backplate.
❏ 11. Make a mark on the firewall for the throttle
pushrod. Also make marks for the fuel line holes.
❏ 12. Remove the engine mount from the firewall.
Drill 1/4" fuel line holes and a 3/16" hole for the
throttle pushrod.
❏ 13. Go to the “ASSEMBLE THE FUSELAGE”
section.
16
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