Effectivity: 912 Series
Edition 1 / Rev. 0
d04056
page 85
May 01/2007
BRP-Rotax
INSTALLATION MANUAL
14.2) Operating limits
▲ WARNING: Design and layout of the fuel system has to warrant engine
operation within the specified limits.
Fuel pressure:
See Fig. 55.
max. ........................................................................ 0,4 bar (5.8 psi.)
min. ......................................................................... 0,15 bar (2.2 psi.)
normal ..................................................................... 0,3 bar (4.4 psi.)
▲ WARNING: Fuel pressure in excess of stated limit can lead to an override
of the float valve with subsequent engine stop.
◆ NOTE: Readings of the fuel pressure are taken at the pressure gauge
connection (6) on the fuel manifold (4). See Fig. 55.
The engine manufacturer recommends the use of an electrical auxiliary fuel
pump, if this is not already required by airworthiness requirements.
The electrical auxiliary fuel pump is not just required in case of a malfunction or
defect of the mechanical fuel pump, but also provides required fuel supply e.g.
in case of vapour formation at high altitudes and temperatures.
◆ NOTE: If an electrical auxiliary fuel pump is installed, the whole fuel
system has to be designed to warrant engine operation within
the specified pressure limits.
■ CAUTION: The fuel pressure of an additional auxiliary fuel pump should
not exceed 0,3 bar (4.4 psi.)
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