❏
2. Temporarily mount the engine to the backplate engine
mount. Use a pushrod aligned with the carburetor arm to
determine the location for drilling the hole through the
engine mount. Mark the mount where the pushrod enters.
❏
3. Remove the engine, and then drill a 3/16" [4.8mm]
hole through the mount at the mark. Position the mount on
the firewall with the hole you drilled nearest the bottom of
the fuselage. Bolt the engine mount to the firewall with four
6-32 x 1/2" [13mm] SHCS.
❏
4. Use the hole in the mount as a guide to drill a 3/16"
[4.8mm] hole through the firewall. Note: It is okay if you drill
through a portion of the factory-installed blind nut on the
back of the firewall. Remove the mount.
❏
5. Cut a 6" [150mm] piece off the 11-3/4" [300mm] outer
pushrod tube. Roughen one end of the 6" [152mm] pushrod
tube with coarse grit sandpaper. Glue the roughened end of
the pushrod tube to the firewall with 1/8" [3mm] protruding
from the front of the firewall.
❏
6. Glue a 1" [25mm] square piece of light glass cloth to
the tube and the firewall.
❏
7. Remove the engine mount from the firewall and the
engine from the engine mount.
❏
8. Bend the tubes as shown, taking special care not to
kink them.
11
