Muffler Installation - Hangar 9 Alpha 40 ARF Assembly Manual


Step 7
Use a hobby knife with a #11 blade to expose the two holes
for the fuselage hatch mounting screws.

Step 8
Slide the fuselage hatch in position on the fuselage. The tabs
will lock the front of the hatch in position.
10

Step 9
Slide a #4 washer on a 3mm x 12mm socket head screw.
Place a drop of threadlock on the screw.

Step 10
Use a 2.5mm hex wrench or ball driver to tighten the
screw. Use two screws and washers to secure the hatch
to the fuselage.

Muffler Installation

Required Parts
Fuselage Muffler
Required Tools and Adhesives
Hobby knife with #11 blade Hex wrench to fit muffler

Step 1
Attach the muffler to the engine using the hardware
provided with the engine. Make sure to follow the engine
manufacturer's instructions where applicable.

Step 2
Connect the fuel lines to the carburetor and muffler. The line
from the vent will attach to the muffler, while the line from the
clunk will attach to the carburetor. Use scissors or a hobby
knife and #11 blade to trim the length of the line if necessary
so they don't interfere with the operation of the engine.
Hangar 9 Alpha 40 ARF Assembly Manual