need advice on electric fuel pumps
 

ran the cig couple times now .. it has holley electric pumps ... they run and make noise build pressure then all of a sudden running but no pressure .. its like they loose prime ... both pumps do it frustrating as hell one minute have 7 pds next drop to 0 . any sugestions .. thanks guys

Holley's are sensitive to trash in fuel. Do you have filters between pumps and tanks?

Are they shutting off while the motors running?

Go with Aeromotive A1000s .... Have had great luck with them

same here,8yrs,,still going

I haven't heard anything great about Holley electric pumps yet for marine use.

Any water in the fuel ? how hot are your fuel pumps running ? Vapor locking ? Fuel pump cavitation, Too much fuel vacuum (pulling fuel) restricted anti siphon valve ?

No electric pumps like to draw fuel....the black/red/blue Holleys are amongst the worst offenders. They need to be mounted real, real low.....and then...they are still not without problems. There are better.....still mount the others as low as you can go.

Use anything but Holleys. I run SX pumps. I have injection, so not sure mine could go that low on pressure. But 10 seasons on them, zero issues.

you have to get the right regulator.I modded the efi one w/ a shim plate in betw the 2 halfs and opened the relief hole.also used a bigger ball bearing under the spring.
I knew I was going efi but set my boat up to run on a carb first as I built my whipple motors.

as sb stated,the holley blue,black&red pumps are pretty much junk.i am running aeromotive a1000 pumps with great results .

FWIW, I ran the Holley Black electric pumps on my old Top Gun for 10 seasons, sold the boat 5 yrs ago and they are still going strong. Yes, I do feel the Aeromotive is a better pump but installed properly, the Holley's do work well. As mentioned above, electric fuel pumps do not like to pull fuel, they Must be mounted close to the tanks and as low as possible.

pumps are below the tank but the fuel water seperater lines come out and make a 90 go upward to the housing and then down a ninty .. to the pump ill post picks .. i drove up to see ..what a pain in the ass theese pumps are ..anyne know haw the tank confiquiration is on theese top guns . it looks like a hose runs on top of the tanks ..confusing .. and thanks wired through selonoids ect looks like a great install ..

http://i4.photobucket.com/albums/y12...psea9bc4mj.jpg

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Wow that looks horrible. I would take it all out and do it right. Throw all that junk in the trash and start over with the right parts. The wiring is bad too.

that is some crafty pluming i must admit.. just go back to a seawater pump with ke fuelpump like my fountain

Rob, the best thing you can probably do, is rip out all that crap, and start from the fuel tank with new stuff. The best pump in the world isn't gonna help with small, restrictive style fittings like that. Especially if you are thinking of going to larger blowers. I can help you put together some basic, yet proven fuel system setups that simply work.

mild thunder to the rescue .. true asset to this site folks ...