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915 fuel pump connections

by Peter Harrison in 915iS Technical Questions 3 years ago

just about to install my 915 cant find which connector connects to which fuel pump.

Does cable labelled Fuel Pump A go to main pump and B to aux pump.

Its not clear inside the fuel pump which is which. Anyone done this ?

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Re: 915 fuel pump connections

by Bill Hertzel » 3 years ago

Bill Hertzel

13 1.95k 7.98k

Yes, A is MAIN, B is AUX.
The MAIN Pump is plumbed closest to the INlet side of the Pump Assembly.
The AUX is Closest to the OUTlet.
In reality, it makes little difference. They are both Equals.
Once at a safe altitude, Select one pump for the cruise flight.
MAIN on EVEN Numbered days and AUX on the ODD days.
- - -
The only real reason for consistent wiring is if one day you have a pump problem, you will know which pump it is physically.

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Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

Thank you said by: RotaxOwner Admin, Michael Baker

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Re: 915 fuel pump connections

by Peter Harrison » 3 years ago

Peter Harrison

11 9 34

Brilliant, thanks Bill. Makes sense. Extra confusion because my pump doesn't have the Main and Aux lables inside. Your clarification, Main near inlet most helpful.

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