Hangar 9 RV-8 Assembly Manual page 19


Step 6
Use a 9/64-inch hex wrench and one of the 8-32 x 3/4-inch
socket head screws and a #8 washer to draw the four 8-32
blind nuts into the backside of the firewall. Note that the
barbs on the blind nuts face the wood and keep the blind
nuts from rotating or falling out.
Hint: Apply a couple drops of medium CA to the barbs
of the blind hut before installing. This will help to keep
the blind nut secure should you ever need to remove
the screw.
Hangar 9 RV-8 Assembly Manual

Step 7
Attach the motor mounts to the firewall using four 8-32 x
3/4-inch socket head screws and four 8-32 washers. Use
a 9/64-inch hex wrench to lightly tighten the screws. You
should be able to move the mounts so their position can
be fine-tuned for your particular engine. Apply a drop of
threadlock on each of the screws to prevent them from
vibrating loose.

Step 8
Connect the Z-bend on the 16-inch (406mm) pushrod to the
carburetor as shown.

Step 9
Use the holes in the engine mount that will position the drive
washer of the engine 4 / inches (111mm) from the firewall
3
8
as shown. Tighten the screws that attach the mount to the
firewall after making sure they have threadlock on them to
keep them from vibrating loose.

Step 10
Slide the pushrod into the pushrod tube. Position the
engine between the mounts, then secure its position using
four 4-40 x 1-inch socket head screws, four #4 washers
and four 4-40 locknuts. Place the washers on the bottom
side of the mount between the mount and lock nuts. Use
a 1/4-inch nut driver or box wrench to hold the locknuts
while tightening the socket head screws with a 3/32-inch
hex wrench or ball driver.
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