In-Cowl Mufflers Installation - Hangar 9 Extra 300 ARF Assembly Manual

In-Cowl Mufflers Installation

Required Parts
Fuselage Wood plate
Required Parts (not included)
DA compact mufflers
Required Tools and Adhesives
Threadlock 4mm hex wrench
Rotary tool Sanding drum
Cutting wheel
NOTICE: Always refer to the product's instructions for
installation, use and safety.
WARNING: This product can become extremely
hot when in use, which could lead to burns.

1. Prepare the DA compact mufflers by inserting the
gasket and bolts in the muffler. Apply threadlock on the bolt.

2. Using a 4 mm ball driver, bolt on the mufflers such
that DA logo is facing the front of the airplane and stacks are
towards the aft of the engine.
22

3. Bottom of the cowl needs to be opened to
accommodate DA compact muffler. Mark how much the cowl
needs to be opened. Using a rotary tool and cutting disk,
open the cowl little by little until reaching correct size.

4. Use a sanding drum to shape the stacks on the cowl.

5. When using compact mufflers, the canister tunnel
opening can be blocked off by the wood plate provided.
35% Extra 300 ARF Assembly Manual