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I am out of ideas on this one.
I have a aircraft tug, gas powered.
We got it with a electric pump already in it, we go through a pump a year, sometimes more often

I have tried Airex, Carter, and Mr Gasket

I originally thought it was because we would run out of gas, but we have not been doing that anymore.
I put the fuel through a 10 micron spin on filter, and it has the little filter on the pump itself.
Only thing I can think of is that we sometimes will burn up gas that we remove from tanks we are changing, sometimes this fuel is not that great.

I just burned out another one, and it happens without warning. Getting tired of it and I am out of ideas, also tried a different power source, same thing happens.

Could it be too much head (suction) pressure on it from the filters? Try putting the finer filter on the pressure side.

raybo
you talking about those little 12v pumps handing on the shelf at the auto parts? kinda square looking? i dont think they are designed for real serious duty
what engine is in it?

Check with Allen Machine Co - they advertise in Boats & Harbors and have always carried surplus military electric fuel pumps, 12 & 24 volt. I don't see the fuel pumps in their current ads in B&H but they probably still have 'em - heavy duty and cheap. 800 451 8899...nice folks too.

UV

Positive displacement type or centrifical? When you say burnt out do you mean the motor stops or the motor runs but no fuel output? Overheating is one reason I was told, the fuel cools the pump side and if not enough will overheat. I have countless hours on Walbro FRB-13-2 recipricating pumps as they shut off when pressure is developed on output side.(Say the floats are close to closing/idling engine) and that prevents overheating them Walbro says. www.go2marine.com has them I believe.

thanks everyone

engine is a Chrysler flathead 6

current one is a Mr Gasket pump. Its not like I am running all day with it either, few minutes here and there, maybe 1/2 hour at most.
Sometimes it goes days without running.

Feeds a single barrel carb. I just put another one in and moved it back by the tank so its only sucking 8" or so then it pushes another 3-4', supposed to be more efficient at pushing then pulling so I will see how long this one lasts.
I have it on a switched power source that is fused.

My old 454's has Carter fuel pumps. The starboard pump gave me trouble several times.....it was like it lost prime. I would remove the fuel line and suck gas (YUK! ! ) thru the pump up to the carb, then we would be off and running until I let it idle,like trolling, for a while.

A mechanic buddy pointed out that these systems do not have a return line, therefore the pump is pumping dead aganist a nearly closed valve when the engine is running at idle.

He cured the problem by installing a valve in the line going to the carb and running a return back to the tank.

I had to complicate it a little more....so I went to Summit Racing and purchased a BYPASS type fuel pressure regulator and install it on my engines. Using a fuel pressure gage I set the regulator to hold 3 PSI at full throttle. It ran good........

Then from there I pulled the gas engines out and installed diesels.

I may have plans for the old gas engines.....but that is another story.

hb

Harry my thoughts exactly, built a big block with an electric fuel pump I had to install a pressure regulator to "feed" just enough to the carb as well as a return so the pump wouldnt dead head. BH

I had a regulator at one time ( its still in the engine compartment) and it still has the return line to the tank hooked up, I found I would have to pinch the line to get it to start sometime, maybe I needed to tweak the pressure a bit so I gave up on it.

Maybe I will try hooking it up again, its all there so its real simple to

when it runs its running just kind of off-idle, just moving boats around the yard

why not just put the stock fuel pump back on it???

coolair wrote:why not just put the stock fuel pump back on it???

good question- it never had one since we got it about 10 years ago.
I dont know if the original pump went bad or if whatever drives the pump wore out, maybe I will look into it but sometimes you leave well enough alone on something that old, its a 1957

1957 a verry good year!!!!

RussP

I had to go in today for a bit so I looked and as I thought the original mechanical pump is still there, so I will try to get one from the auto parts store next week, if there is no rod in there or its worn out maybe I can get one of those too

Went to oreilly auto parts and put in chyrsler and it shows a little electric pump, but its different than the mr. gasket pumps

http://www.oreillyauto.com/site/c/detai ... &ppt=C0025
you have been using something like this right?

http://www.oreillyauto.com/site/c/detai ... &ppt=C0128

coolair wrote:Went to oreilly auto parts and put in chyrsler and it shows a little electric pump, but its different than the mr. gasket pumps

http://www.oreillyauto.com/site/c/detai ... &ppt=C0025
you have been using something like this right?

http://www.oreillyauto.com/site/c/detai ... &ppt=C0128

I have tried both of those pumps