Fuel System - Rotax 912 iS Sport Operator's Manual

7.3) Fuel system

Fuel flow
Fuel pump
switches
Fuel pressure
regulator
Return line
Page 7-6
January 01 2019
The fuel flows from the tanks via a water separator/coarse filter
to the electric fuel pumps (1) (connected in series) from where it
is pumped thru the fine filter to the fuel rails (2, 4), the fuel injec-
tors (3) and to the fuel pressure regulator (5)
The fuel pumps are activated directly through the switch OFF/
ON. During take off and landing both switches (main and aux. )
must be ON.
A fuel pressure regulator ensures that the pressure differential
between the fuel injectors and the intake manifold remains con-
stant. This enables the fuel injection system to inject the same
quantity of fuel at any point given the same injection period.
Through the return line surplus fuel flows back to the fuel tank.
NOTE
The return line must be always returned into the tank, from
which fuel is sucked into the fuel pump.
BRP-Rotax Effectivity: 912 i Series
Edition 2 / Rev. 0