Section 5: 2-Stroke Engine Installation - Hangar 9 RV-8 Assembly Manual

Section 5:
2-Stroke Engine installation
Required Parts
Fuselage Engine mounting template
#8 washer (4) 8-32 blind nut (4)
4-40 locknut (4) #4 washer (4)
Engine
4-40 x 1-inch socket head screw (4)
Throttle pushrod, 16-inch (406mm)
Throttle pushrod tube, 8-inch (203mm)
8-32 x 3/4-inch socket head screw (4)
Tools and Adhesives
Drill Low-tack tape
Phillips screwdriver: #1 Ruler
Medium grit sandpaper Side cutters
Medium CA Threadlock
30-minute epoxy
Hex wrench or ball driver: 3/32-inch, 9/64-inch
Nut driver or box wrench: 1/4-inch
Drill bit: 1/16-inch (1.5mm), 5/32-inch (4mm),
7/32-inch (5.5mm)

Step 1
Cut the engine mounting template from Page 47 of the
manual or use the supplied plywood template. Use low-tack
tape to attach it to the front of the firewall as shown.
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
Step 2
Use a drill and 1/16-inch (1.5mm) drill bit to drill the
appropriate holes for your particular motor. The throttle
pushrod locations are also located on the template for both
Saito and Evolution engines.
Hint: Use a #1 Phillips screwdriver or center punch to
make an indentation in the firewall so the drill bit does
not wander when drilling the holes.

Step 3
Use a drill and 7/32-inch (5.5mm) drill bit to enlarge the four
holes used to mount the motor mount to the firewall. Use a
drill and 5/32-inch (4mm) drill bit to enlarge the hole for the
pushrod tube.

Step 4
Use a drill and 5/32-inch (4mm) drill bit to drill a hole
3/4-inch up and centered in the plywood as shown.

Step 5
Use medium grit sandpaper to roughen the last 1
(32mm) on both ends of outside of the 8-inch (203mm)
throttle pushrod tube. Insert the tube through the two holes
so 1-inch (25mm) of the tube extends past the former
toward the servo as shown. Use medium CA to glue the tube
to the former and firewall.
Hangar 9 RV-8 Assembly Manual
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