d05787.fm
INSTALLATION MANUAL
BRP-Powertrain
Effectivity: 912 i Series
Edition 1/Rev. 0
78-00-00
Page 3
January 01/2012
1) General notes on the exhaust system
Certification An exhaust system especially designed for universal application has
been developed by BRP-Powertrain. Certification according to the latest
regulations, such as FAR or EASA, must be conducted by the aircraft or
fuselage manufacturer.
1.1) The following recommendations should help the aircraft or fuse-
lage manufacturer to select a suitable exhaust system.
Damping element The ideal is a common transversal damping element serving all 4 cylin-
ders, positioned under the engine.
NOTE: Equal length of pipes from the cylinder to damping ele-
ment is recommended for better tuning.
Distribution of
the exhaust sys-
tem
Distribution of the exhaust system into 2 separate systems is not recom-
mended. Individual mufflers on either side cause power loss and
increased engine noise.
Exhaust flange During assembly, ensure that the flange is parallel to the cylinder head
flange and is not protruding.
NOTE: Tighten the exhaust flange evenly and in parallel. There
must be a gap of the same size all the way round.
Oil filter There must be a clearance of at least 20 mm (0.79 in.) between the
exhaust pipe and the oil filter to allow the oil filter to be fitted and removed
without having to slacken off the exhaust system. If a heat shield is fitted,
this will also have to be taken into consideration.
Vibrations due to improper installation and mainte-
nance is the most common reason for damage of the
exhaust system.
The exhaust system must not adversely affect the op-
eration or replacement of the oil filter.
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