09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
11-16
8.
Leave the manifold nuts loose until the cowling has been installed and proper
positioning has been verified.
9.
Slide the Tail Pipe Extension over the exhaust pipe on the Muffler until bottomed.
Attach to the Tail Pipe Support Angle at the firewall.
10.
Locate a #11 hole through the top flange of the Tail Pipe Extension and through
the flange on the Muffler.
11.
Locate and drill a #30 hole in the Hose Clamp and install a 1/8" Stainless Steel
Rivet. Install the Hose Clamp on the muffler extension with the rivet extending
into the #11 hole in the Extension and Muffler. Tighten Clamp.
NOTE:
The 1/8" Stainless Steel Rivet acts as a safety pin to retain the
extension.
ROTAX 912 ULS - OPTIONAL MUFFLER HEATER INSTALLATION
•
The RANS Muffler Style Heater works well for most cases. If additional
heat is required from the Heater, wrap a long spring around the Muffler
before installing the Heater Wraps. Stretching the spring to provide air
gaps between coils will also aid in efficiency. RANS uses spring #9664K48
from McMaster-Carr.
1.
Rivet a Heater Flange to each Heater Wrap.
NOTE:
Apply high-temp silicone to the Flange before riveting as a sealant.
2.
Install Heater Wraps to the Muffler using the hardware shown in the parts
manual.
NOTE:
The Heater Wrap should fit tight around the Muffler. Shim as
required using the supplied Heater Wrap Shims. Heater Wraps will need
to be formed around the Muffler for a tight fit.
3.
Install the Muffler Assembly to the engine as shown in the parts manual. The
Heater Wrap may be safety wired to an Exhaust Spring mount loop to avoid
rotation of the Heater Wrap in service.
4.
Secure Heater Duct Hose to inlet Heater Flange on Heater Wrap with a Hose
Clamp. Route Duct Hose to Cushion Clamp at right FWD cylinder. Cut duct to
length.
5.
Slip Inlet Tube about half way inside Duct Hose and secure with Cushion Clamp,
Spacer, Duct Hose and Inlet Tube to right FWD cylinder threaded boss.
6.
Locate hole in Firewall for Air Diverter Assembly.
7.
Install Reverse Cable Stop in end cap of Slide of Air Diverter. Orientate to allow
installation and access to the small Set Screws.
8.
Install Adjustable Cable Ferrule to bent end of Air Diverter. Allow room to adjust
the Cable Ferrule in and out.