auxiliary electric fuel pump

by Luis Palacin Garcia in 912 / 914 Technical Questions 9 years ago

Hello: I want to know what kind of auxiliary fuel pump installation, advised for 912 engine. In series or in parallel? Thanks and greetings. Luis Palacin
luisfpg1@telefonica.net

Re: auxiliary electric fuel pump

by Rob Seaton » 9 years ago

Rob Seaton

3 1.32k 251

The aux pump should be in-line (series) with the mechanical pump. Rotax also wants a bypass check valve if the aux pump plugs up.
see drawing in 912 Installation Manual.
The Facet Posi-flow 60300 (2.5-4.0 psi) seems to work well.

Fuelsystemschematic.jpg (You do not have access to download this file.)

Thank you said by: Luis Palacin Garcia

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Re: auxiliary electric fuel pump

by Jeremy Ashcroft » 9 years ago

Jeremy Ashcroft

1 4 0

Anyone have the specs for the Check Valve (6) above, the spring loading, pressure to open the valve, size and any good makes recommended.

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Re: auxiliary electric fuel pump

by Rob Seaton » 9 years ago

Rob Seaton

3 1.32k 251

#6 is a simple no-bleed, low crack pressure check valve. (no spring loading)
Andair make nice checkvalves with all sorts of hose fittings http://www.andair.co.uk/category/check-valves/

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