Carburetor Flange - Rotax 912 Series Maintenance Manual

13.1.4)
00366
fig. 051
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II

Carburetor flange

See fig. 051 and 052.
The fixation of carburetor on engine 912 is designed to allow secure
fastening on intake manifold by carburetor flange ass'y 267 787and use of
the genuine ROTAX air filter 825 551.
An additional carburetor suspension by a tension spring
has been introduced standard since design year 1996.
See para 14.12 and Service Bulletin SB 912-010, current
issue.
This kind of fixation warrants for safety in case of hard
landing, air turbulences, excessive vibration etc., pro-
tecting the carburetor at a large extent from vibration.
The carburetor flange is subject, apart from chemical
strain due to fuel and UV radiation also to stress by
vibration. Excessive tightening of the clamp may also
damage it.
Compress carburetor socket in the area of the carbure-
tor connection to allow easier detection of existing
cracks Q and E. Also check the area of the inner
diameter W. If cracks are suspected, tighten the new
carburetor socket up to the prescribed gap of 7 mm
(.275 in.).
At replacement of the carburetor socket take care of the following:
— As on engine of type 912 Series and type 914 Series the old carburetor
sockets won't be longer available, a new socket will be used.
— On the affected engines old carburetor sockets of the carburetor 1/3
and 2/4 can be replaced separetly and therefor a mixed arrengement
is feasible.
As this carburetor socket is without Al-spacer, the carburetor socket must
be fitted according to Service Instruction SI 912-004 and Service Bulletin
SB 912-010.
CAUTION: To assure safety of the fixation, it is recommended to
apply a safety wiring of suitable dimension, as per usual
standard in aviation.
page 44
Initial issue, Jan. 01/2002