Fuel System: Mr. Gasket electric fuel pump failure.

[Jerry Johnson]

Last year I installed a Mr Gasket S12 Electric fuel pump (4 to 7 psi / 32 gal per min.) in line with my manual fuel pump and as you all mostly have described, used it on a hot wire manual switch, turning it on only to prime for the first start after sitting a few days or when ever it stumbled while running in slow city traffic. Three weeks ago, it just stopped running and I could not get fuel through the pump. Had to flat bed the car home. When I removed it, it looked as if it had run very hot. I sure it never actually ran more then 5 for 6 hours total before failure. Any one have any ideas why this failure or why it ran so hot? It is my understanding that pass through pumps are cooled by the fuel running through them, but am not sure that is true. Am reluctant to put another $50 pump on, that does not last any longer then that. By the way, until it failed the set-up was working great for me. Dear me, forgot to add, running on a 289 1956 SkyHawk WCFB 4B 210 HP.

[JoeHall]

I have ran these for over 25 years, and never had a problem. To this day, it is what I have on the 56J, except its a higher capacity one, in order to run a return line: https://www.googleadservices.com/pag...QvhcIQg&adurl=

[thunderations]

Are you running a bypass line back to the tank? If not, you are probably not running enough fuel through the pump to provide proper cooling.
Think of a garden hose laying in the sun and how hot that water gets and how long it takes to run it out to get cool water. A bypass line allows the pump to flow a large quantity of fuel to cool the pump and the excess, not used by the engine is simply sent back to the tank to flow again.

[Chicken Hawk]

Just a thought. Check to be sure there is room and if so put an R 1 pump on it. I had trouble with my truck hauler vapor locking in hot weather and put one of the small block Mopar pumps on (Carter M6270) and no problem since. Phil Harris sells them. They have to be modified slightlly (reclocked and the arm bent correctly) which Phil does).

Ted

[GrumpyOne]

Where is the pump located and more importantly, does it have a filter prior to the fuel reaching it? I have always located my electric pumps just ahead of the rear spring mount on the Power Hawk, '55 Prez sedan and a former '63 Lark four door. All have been flawless in operation. On the Prez and Lark they were the only pumps while the Power Hawk has both the electric and mechanical pump...

[Mike Van Veghten]

On the other hand...once in a while...stuff just fails.

Mike

P.s. - In my opinion, pushing fuel thru a mechanical pump with an electric pump is dangerous thing to do anyway. These mechanical pumps are not made to have fuel pushed thru them. A ruptured diaphragm will cause fuel to end up...in the oil pan. As one might imagine, that's not a good thing. Seen it happen more than once.

[WCP]

The OP did say that he only uses the electrical pump for priming, and an occasional shot when percolation causes stumbling.

[doofus]

Check your fuel pump's ground. have this same pump on '56 wagon project and it loses ground from time to time.ground a spot on frame to bare shiny metal and installed ground lead. a few months later and no pump action, bad ground. re clean spot on frame, it had turned black, and re ground. 6 mo later same thing. ran ground wire to batt to solve prob. Luck Doofus

[Jerry Johnson]

I miss stated the pump part number, it is 12S, not S12 and is rated at 35 GPH, not 32 as stated in my initial post. It comes with a pre-pump filter in the kit you purchase. I think somewhere it was listed as 100 microns, but could not verify that on their website. I noted that several of you Stude guys, had good results with Mr. Gasket pumps, but wonder if you have used the most recent pumps which don't seem to enjoy near as good of reviews as the older pumps did. The pump was mounted on the frame rail, just in front of the start of the rear spring. The 56 Skyhawk, had the tank inlet in the top of the gas tank in conjunction with the sending unit. Mr. Gasket (Holly) does not seem to proud of this pump, with only a 90 day guarantee. I am not running a tank return line and you may be right that this is a problem as I am also not using the pump as the only source for pumping (as where the manual pump is eliminated).