73-00-00
page 24
October 01/2010
Effectivity 914 Series
Edition 1 / Rev. 3
d04777
BRP-Rotax
Maintenance Manual
3.3.2) Float needle valve leakage test
See Fig. 73-12.
This check is carried out to ensure that the float valve seat is not leaking.
If the pressure is not maintained, pay particular attention during
disassembly to the float valve with the viton tip and the carburetor
housing.
Turn the carburetor upside down, as the float needle valve is only
closed in this position.
Connect pump (1) to the fuel supply line (2) and apply approx. 0.4 bar
(5.8 p.s.i.) of pressure.
The pressure must be maintained for about 5 seconds.
■ CAUTION: If pressure drops, this indicates leakage which may
cause fuel overflow and in consequence engine damage
due to hydraulic shock.
Replacement of the float valve seat is not permissible.
Fig. 73-12
08245
1
2
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