Today I carried out the fuel flow check of the electric fuel pump on my
912S
mono. I adjusted the fuel pressure to 2.2psi (as well as able) and timed
the
flow of fuel into a measured container. I managed to draw 1.5-1.6 litres
in
4 mins against the requirement for 2.25 litres in 4 mins. The flow
without
any pressure increasing restriction was about 1litre/min. The throughput
was
the same from main and reserve sides of the tank.
The pump was quite noisy in operation ( more like a miniature pile
driver as
a colleague described it on his a/c) though It did become somewhat
quieter
when fuel started passing through it. It is the listed model 'facet
40106.
The flow through the filters seems to be very turbulent with the glass
about
=BD to 2/3 full and the pump seems to vary in speed and noise
occasionally.
Does the pump require special priming?
Can anyone confirm the flow rate expected with no pressure applied?
Am I missing something here?
Have I got myself a duff pump?
I=92m ready to get the engine fired up when this is sorted so any help
would
be appreciated.
Mike
G-CFMP
|