fbpx
Login

 

Jump to Forum..

Fuel Pump Differences

in 912 / 914 Technical Questions Yesterday

Likely a dumb question here: I'm currently helping a friend  with the Rotax 5 year replacement schedule on a 912ULS.  We ordered a new fuel pump and noticed some distinct design differences between them. I wanted to get some community feedback on the compatibility/safety/reliability of the new pump.  The old pump is likely over 10 years old.

The Differences Noticed:

  • Sealing: The old pump utilizes an O-ring for sealing, while the new one does not.

  • Venting/Drainage: The old pump features a nipple for a vent tube, whereas the mew one has a standard weep hole on top.

Thanks

 

 

 

 

 

11340_1_IMG_3300.jpeg (You do not have access to download this file.)
11340_1_IMG_3301.jpeg (You do not have access to download this file.)

  • Re: Fuel Pump Differences

    by » 23 hours ago

    The one with a weephole is an aftermarket on. Maybe purchased from sideslip aviation. I'd stay with a new OEM one from one of the service centers 

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
    Report

  • Re: Fuel Pump Differences

    by » 19 hours ago

    Unfortunately, your new pump looks like a Chinese version made for their copy of Rotax, offered under ZongShen brand.....

    I was never so brave to test them, despite their affordable price ~$100...

    S.

     

    44718_2_zonsen1.jpg (You do not have access to download this file.)
    44718_2_zonsen2.jpg (You do not have access to download this file.)
      
    Report

  • Re: Fuel Pump Differences

    by » 16 hours ago

    IF (?) you decide to stay with the aftermarket pump, I would suggest you rotate the outer casing, so that the "weep hole" is at the bottom, when mounted on the engine.😈

      
    Report

  • Re: Fuel Pump Differences

    by » 13 hours ago

    Thanks gents.  Y'all confirmed kind of what I was thinking.  If it were my plane Id defiantly stay away from it.  Thank again for the responses.

      
    Report

  • Re: Fuel Pump Differences

    by » 6 hours ago

    "If it were my plane Id defiantly stay away from it.  "

    Why?

    It may be a perfectly adequate fuel pump. 

    My first Rotax fuel pump didn't even have a "weep hole" - Did about 400, trouble free, hrs  before I changed it out for one meeting the current design/specifications. Gave it away, when I sold the last aircraft/912ULS, as a working spare.😈

      
    Report
You do not have permissions to reply to this topic.
Related Topics
Title Category Replies
914 Fuel Pump Indicator 912 / 914 Technical Questions 6
912 UL Low Fuel Pressure and Power Loss 912 / 914 Technical Questions 8
Fuel lines to carburetor - stainless vs teflon 912 / 914 Technical Questions 14
916is pump and engine P/N questions 916iS Technical Questions 0
916 fuel pressure problem General Tech Discussion 18
Follow Us

Safety First!

To receive critical-to-safety information on your ROTAX Engine, please subscribe to
ROTAX-OWNER.COM

Login