electric fuel pump

[scubarider]

What do you guys think of adding an electric fuel pump for the 912S ?

[Wes]

Dennis,
I added a Facet in-line pump (see pic) just because I am anal about fuel systems, - don't know if I really need it or if it will even work! (too much restriction in the fuel line, etc) The intent would be to make sure that I didn't need it for "normal operation" and I'd only switch it on when it seemed like a good idea (take-off, landing, loss of engine pump, etc.).
The only caution for a Rotax 912 installation, is make sure the pump output pressure is low. I think 5 psi is max. allowed on Rotax carbs.
I don't have motor yet, so all is unverified.

Wes
Kit #95

[Dave Krall CFII SEL SES]

Don't feel too bad about it Dude, I'm using TWO electric fuel pumps in my Suzuki application...

[scubarider]

I think that I will get a fuel pump.  It does have a low restriction on psi.  I will mount it on the firewall engine side.  I think folks have just left it on all the time.  Anyone have any problems doing this?
D

[Johnny C!]

Dennis,
 I am reading through all of the 912 threads that
show up from the search box, and I saw this old
thread.
 
Did you add this pump? And does it work as intended?
Would you do it again?

Thanks!

John

[b1x4nqb]

FWIW, I also added an electric fuel pump and it is located in the inside of my firewall in a verticle position with the fuel line coming under the floorboard and sweeping up into it.  The line then sweeps back to a panel mounted fuel shutoff before reversing course to the engine.  

I use it every time I start the engine to get my fuel pressure up to about 3.5lbs of pressure and that assures me I have fuel in the lines leading into the engine.  My fuel pressure device is located just before entering the carbs.

I don't advocate that my way is the way to use one but it works like a charm every start.  I guess it carried over from Pipers.  I haven't needed it for anything yet and I don't use it for takeoffs or landings but if my fuel pressure light ever comes on I wanted to have another way to force as much fuel inline as I could to try to avoid starvation.  That seems to be a very common cause of accidents in general.

The manual does state a max pressure of something around 5lbs. (don't know exact#).

I'm sure it is overkill but one of those things I wanted to have.

Paul, PA

[stede52]

Dennis,
I also put a facet pump in my system and used the configuration rotax recommends in their latest rev of their installation manual. I had to find the latest version online. They recommend using a check valve and by-pass in the event the backup electric pump somehow plugs.  I'll post pics when I get home tomorrow.

steve

[scubarider2]

Yes, I did end up installing the electric fuel pump.  Would I do it again?....probably.  To date though, I have not found it necessary.  My Rotax starts right up without it.  I have never used it during take-offs and landings.  But, knowing that it is there if I should need it is always a good feeling.  I check it by turning it on now and again to make sure it still is working ok.  
Dennis

[Johnny C!]

Which pumps did you guys buy,
and how much do they cost?

Thanks!

John

[b1x4nqb]

Facet and the cost was about $35 but the two ends that screw in (not included with mine) were like another $10 and I got them from Wicks I believe.  Today you may find a new version that has the ends included or at least the correct threads.

Paul, PA

[stede52]

I bought mine from Aircraft Spruce: http://www.aircraftspruce.com/catalog/e ... tpumps.php' P/N 40106
Works great when I turn it on, I have  a fuel pressure gauge and it brings the pressure right up to Rotax's recommended PSI.

Steve

[Johnny C!]

Thanks Guys.
 
That seems like some very affordable peace
of mind!

John

[stede52]

here is a picture of the my bypass setup based on my interpretation of rotax's recommended configuration.  The 90 degree bends aren't the most desirable config but it all the room I had left.

Steve