Effectivity 914 Series
Edition 1 / Rev. 0
page 5
May 01/2007
d02623
73-00-00
BRP-Rotax
Maintenance Manual
2.2) Fuel system (on 914 Series)
See Fig. 73-2.
The fuel system comprises the following items:
- fuel tank
- coarse filter
- fine filter / water trap
- fire cock
- 2 electric fuel pumps
- 2 check valves
- and the required fuel piping and connections
The fuel flows from the tank via a combination of filter and water trap (1) to the
two electric fuel pumps ((2) and (3)), connected in series, passes on to the fuel
pressure regulator (5) and further on to the individual carburetors.
A separate check valve (4) is installed parallel to each fuel pump.
â—† NOTE: The arrangement of the two fuel pumps connected in series
yields better reserves against vapor lock at high altitudes and
temperatures.
The two check valves in the system are necessary to ensure
trouble free operation of the fuel system with one pump only.
The surplus fuel passes from the fuel pressure regulator back to the tank via the
return line (7).
â—† NOTE: The fuel pressure regulator serves to maintain the fuel pressure
at always approx. 0.25 bar (3.6 p.s.i.) above the changing boost
pressure in the airbox, thus ensuring proper operation of the
carburetors.
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