d04923.fm
INSTALLATION MANUAL
BRP-Powertrain
Effectivity: 912 Series
Edition 2/Rev. 0
73-00-00
page 21
August 01/2012
3) Air intake system
General note See Fig. 12.
The intake system is determined essentially by the demands of engine
and of the acceptable noise emission on the intake side. An airbox can
be supplied by BRP-Powertrain as an option.
Performance data as specified and limits of operation can only be war-
ranted by employment of the GENUINE-ROTAX airbox.
Installation note If it will be necessary to use a different airbox or a modified genuine
ROTAX airbox for reasons of installation the certification to the latest
requirements such as FAR and EASA has to be conducted by the aircraft
manufacturer.
Airbox retrofitted NOTE: If an airbox or GENUINE-ROTAX airbox is retrofitted at a
ROTAX 912 (A, F, UL) Series, a change in the carb jetting
is required. See Illustrated Part Catalog 912/914 chapter
22 and/or SB-912-044 “Use of the ROTAX supplied air-
box“, latest issue.
3.1) Operating limits
Fuel-mixture dis-
tribution
Fuel-mixture distribution:
Low (cold) air temperature in the airbox is favourable for engine perfor-
mance and to reduce knocking tendency at combustion.
The certification to the latest requirements such as FAR and EASA has to
be conducted by the aircraft manfacturer.
The performance is given at ISA (15 °C) (59 °F)
condition only. Engine is equipped with unchanged
GENUINE-ROTAX tuned exhaust muffler system and
air intake box.
Any changes on the air intake system (e.g. modifica-
tion on the airbox etc.) can affect the flow rate in the
air intake system and fuel mixture ratio. In the course
of certification the fuel mixture process must be
proofed by a CO-measurement.
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