• PiperForum.com is a vibrant community of Piper owners and pilots. Our over 1,500+ active members use Piper Forum to swap technical knowledge, plan meetups and sell planes/parts. We host technical knowledge of general aviation topics and specific topics on J3-Cubs, Cherokees, Comanches, Pacers and more. In addition to an instant community of pilots for you, PiperForum.com is a library of technical topics, airplane builds, images, technical manuals, technical documents and more.

    Access to PiperForum.com is subscription based. Subscriptions are only $49.99/year or $6.99/month to gain access to this great community and unmatched library of Piper knowledge.

    Click Here to Become a Subscribing Member and Access PiperForum.com in Full!

The Weldon electric fuel pump in my arrow is kinda slow


New Member
Apr 1, 2011
Reaction score
Looking for advice please, for the last month or so when I start my plane for the first time of the day it takes a bit longer than normal to get it started. The fuel pressure is a little low.
I talked to the shop that overhauls these for $600 and he said if is a Weldon then the fuel flow can be adjusted.
I can see a screw adjustment between the in and out flow of the pump.
Can my mechanic adjust that to see if it flows with a higher pressure?
And is the problem with the pump or the motor. The motor sounds fine, it just seems like the flow is too slow. Like a impeller isnt doing a complete job or something like that. I don't even know if there's an impeller in it or not.

Anyone have experience with this pump.
The motor says 8850-5 and I think the pump is 481-780 and the whole Assy 67881-005.

I'm just trying to find an inexpensive solution v/s the $600 overhauled pump.
And advice would be greatly appreciated.

Latest posts