09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
11-15
20.
After running the engine for a few minutes, check the oil level and check for any
leaks in the system.
ROTAX 912 ULS - MUFFLER ASSEMBLY
(FINAL INSTALL OF ENGINE)
ASSEMBLY
•
The engine needs to be installed to the airframe.
NOTE:
If installing the optional Muffler Style Heater, you may wish to install the Heater
Wrap prior to installing the Muffler.
1.
Refer to the parts catalog and select the required components for assembly.
2.
Cut three segments, each 1 3/8" long from the 1 1/4" O.D. Rubber Hose provided
in the 912 Muffler - Raw Stock Kit. Locate the center of each segment lengthwise
and drill or punch a 1/4" hole through the top and bottom wall. Install the 6mm
bolts and Formed Washers from the inside of each segment. Refer to the PARTS
MANUAL DRAWING and
FIGURE 11E-02/912
.
3.
Cut three segments, each 1 3/8" long from the 3/4" O.D. Rubber Hose. Insert
between the bolt heads, in the isolator assembly, until flush on each end. Safety
wire inner hose in place as shown in
FIGURE 11E-03/912
.
NOTE:
In order to tighten the bolts, it may be necessary to wait with
installing the inner segments and safety wire until after the isolators have
been installed on both the Muffler and Muffler Attach Channels.
4.
Apply Loctite to the threads of the top bolt and attach the isolator assembly,
aluminum washer and thick washers to the Muffler as shown in the PARTS
MANUAL DRAWING.
IMPORTANT:
Isolators should be final installed laterally (open end to
sides).
5.
Install the isolator assembly to the Muffler Attach Channels.
NOTE:
The left Attach Channel will be installed flanges up, while the right
is flanges down.
6.
Bolt the Muffler Assembly with Channels to the tab and bushing on the lower
tubes of the engine mount.
7.
Bolt the FWD Muffler Manifold #1 to the forward cylinder exhaust ports of the
engine. Bolt the AFT Exhaust Manifolds to the aft cylinder exhaust ports. Do not
fully tighten the nuts, at this time, to allow for adjustment of the manifolds. Slip
the FWD Muffler Manifold #2 and Muffler Canister Couplers into place and install
Muffler Springs.
HINT:
Muffler Springs may be more easily installed using a length of cord
wrapped around a dowel.