Adding resistor to 914 fuel pumps?

by Steve Crewdog in 912 / 914 Technical Questions 6 months ago

I seem to remember something about adding a resistor to the 914 fuel pumps, I'm wiring them in now and can't find the dang reference. Any ideas?

Thanks

Re: Adding resistor to 914 fuel pumps?

by Des Howson » 6 months ago

Des Howson

4 73 402

Hi Steve,

I think you are referring to the requirement for a capacitor to be installed at each pump.

Pages from the installation manual attached.

Here’s a link to service instruction SI-914-035 referring to the “new” style pumps. If they are the style you have, it additionally calls for a ferrite core to be installed.

https://rotax.my.salesforcesites.com/DocumentsSearch/sfc/servlet.shepherd/

version/download/0681H000009TmEGQA0?asPdf=false

Cheers.

42565_2_IMG_2672.png (You do not have access to download this file.)

42565_2_IMG_2671.png (You do not have access to download this file.)

42565_2_IMG_2673.png (You do not have access to download this file.)

42565_2_IMG_2674.png (You do not have access to download this file.)

Thank you said by: Steve Crewdog

Report
Re: Adding resistor to 914 fuel pumps?

by Steve Crewdog » 6 months ago

Steve Crewdog

15 13 82

Thanks Des, as soon as I left my hangar I remembered it was a capacitor, not a resistor, which makes the installation a lot easier. I have the older style pump nib with the ring terminals.

Report
Re: Adding resistor to 914 fuel pumps?

by Steve Crewdog » 3 months ago

Steve Crewdog

15 13 82

I did the capacitor alone then work got in the way, getting ready to do it now and I'm thinking I could insert the capacitor leads into the ring terminals along with the wires, and from there into a Deuthsch connector. This is just mocked up, thoughts?

Tia

43238_2_Capacitor and connectors mocked up.jpg (You do not have access to download this file.)

Report

You do not have permissions to reply to this topic.

Title	Category	Replies
914 first powerup- no TCU caution or warning lights	912 / 914 Technical Questions	0
914 with airmaster prop	912 / 914 Technical Questions	3
914 Officially discontinued?	912 / 914 Technical Questions	0
914 Smoke from Exhaust	912 / 914 Technical Questions	2
Adding extra engine sensors to a GEA24 and using Rotax FADEC query	915iS Technical Questions	3