Rotax 912 i Series Installation Manual page 110

Tip
Tip
Tip
Tip
Effectivity: 912 i Series
Edition 1/Rev. 2
BRP-Powertrain
INSTALLATION MANUAL
Fuel pressure regulators have very precise toleranc-
WARNUNG
es and are generally reliable. Pressure fluctuations
are not caused by the pressure regulator, they have
to be searched in other areas (filter clogged, pulsation
of lines, kinks in the hoses, etc.) of the fuel system,
before troubleshooting the pressure regulator.
Vapor bubbles in the return line must be efficiently
WARNUNG
vented out of the fuel system to atmosphere. Ade-
quate fuel tank venting system design is imperative.
Large vent lines with (most) direct routing avoiding
low points are desired.
A header tank design that efficiently jets vapour bub-
WARNUNG
bles back to the fuel tanks and atmosphere without
possibility of re-entry into the suction line, is critical.
Non drainable low points in feed, return and vent lines
WARNUNG
must be avoided.
Any low points must allow for drainage of water and
other contaminants.
At the low points, accumulations of water can freeze
WARNUNG WARNING
and cut off the flow.
73-00-00
Page 14
January 01/2014