Hangar 9 P-51D Mustang 20cc Instruction Manual page 28

165. The prongs of the blind nuts will secure them in the back of
the fi rewall. Install all four M4 blind nuts at the time. Once
installed, remove the screws from the blind nuts.
166. Use a 9/64-inch (3.5mm) drill bit to drill the hole for the
throttle pushrod tube in the fi rewall. Locate the hole at the
corner of the protruding tab as shown.
167. Attach the engine mount to the fi rewall using four M4 x
30 machine screws and four M4 washers. Place a drop of
threadlock on each screw before their installation. Use a #2
Phillips screwdriver to tighten the screws once both mounts
have been positioned correctly on the fi rewall.
168. Fit the engine between the engine mounts. Adjust the engine
1
so the face of the drive washer is 6 / -inches (159mm)
4
forward of the fi rewall. Use a clamp to hold the engine secure
for the following steps.
169. Use a felt-tipped pen to mark the location for the four engine
mounting bolts on the engine mount.
EN
170. Remove the engine from the mounts. Use a drill and
11/64-inch (4.5mm) drill bit to drill the holes for the engine
mounting screws.
171. Insert the Z-bend of the pushrod wire into the outer hole on
the carburetor arm.
172. Slide the throttle pushrod into the opening in the fi rewall. Fit
the engine between the engine mounts. Place an M4 washer
on the M4 x 30 machine screws, then slide the screws
though the engine mounting fl anges and through the holes in
the engine mount.
173. Slide an M4 washer on each screw, the place an M4 locknut
on each screw. Use a #2 Phillips screwdriver and 7mm hex
driver to tighten all four screws, securing the engine to the
engine mount.
174. Secure the ignition module and receiver battery in the
fuselage. Use hook and loop tape and tie wraps to ensure
their location. Make any connections using the instructions
provided with the engine.
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