have you used this pump? Mr.Gasket #12D

FORDF250HDXLT · #1 (**permalink**) 10-28-2009, 03:22 AM

Mr.Gasket Micro Electric Fuel Pump-Diesel 4-7psi 35GPH #12D

this meets the specs of the stock mechanical pumps psi and slightly exceeds the gph by 5.

it appears to be the "MICRO ELECTRIC FUEL PUMP-35GPH" pump.that Mr.gasket states on their website: "Not for Diesel applications!!"
that ones part# is 12S

if you tried one.please state the part#

diesel # 12D

gas #12S

thanks!

i got to thinking,all it needs to do is push the fuel up,the ip does the work.
figure as long as it matches what the mechanical pump does to feed and circulate the injectors why go overkill with the higher psi and way overkill on gph with the holly red.
about half price.i cannot see spending twice as much for something that will work just as good.
its a good brand name too.
i guess it probably just has different seals or something between part numbers.im sure they tested the 12S in their labs with diesel and saw it failed thus reason for making the diesel pump.
if you have used the one for gas.please feel free to let us know how long that lasted too.
also state where you placed the pump and if you used the filter or bypassed it.
also do you guys find that gravity feeds the pump fine from both tanks?
(as you cant place a single pump the recommended 12" or less from each tank of course)
thanks!

you can view better details/specs here from Mr.Gasket than sales sites offer and see the difference between the two:
http://go.mrgasket.com/ProductsListB...minselection=1

a misplaced/no inline fuel filter before the pump,or wrong pump for the application can give a pump a bad rap in a hurry.so i really want honest opinions please.

p.s. looks like amazon has the best deal for diesel # 12D $45 and change.free ship.

im not in a hurry for this mod.i'l do it after my truck is on the road.iv still got plenty to do now lol.
glad the hardest part is over-rusted out front u-joints! man that job sucks haha.

joe f350 · #2 (**permalink**) 10-28-2009, 03:51 AM

y not get a mechianl 1 and just swap out the one on the block

FORDF250HDXLT · #3 (**permalink**) 10-28-2009, 04:01 AM

Quote:

Originally Posted by joe f350

y not get a mechianl 1 and just swap out the one on the block

my mechanical stock lift pump works fine.
im doing this mod for two reasons.
1.more power.by removing a mechanical fuel pump and replacing with an electric pump,you free up power used to turn the pump.it may only be a couple ponies.but those are my hp i can have at the wheels rather than spinning a pump.this also means a tiny bit of improved mpg as well.
little mods= big HP/MPG increases after you do a bunch of them.

2.an electric pump primes the system VERY easy.dont have to worry about burning up starters/draining the batteries due to lost prime/air leaks that are very common with these idi's.

switching over to electric pump is the way to go.

and if i get good feedback about this pump.(imho,if it will go 4-5 yrs at least,for that price im ok with that)

Red Cobra · #4 (**permalink**) 10-28-2009, 06:03 AM

i am sure i have the gas one in my truck i pressure washed the sticker off about a month ago or i would run out and check for you but it was just an off the shelf Mr.G.P pump so my best bet is its not the diesel one your talking about it has been about a year now with no problems and as far as the little filter that comes with it im usure what i did about that as well i may have just drilled it through but also it has been a year so im not 100% and mine is mounted on the wheel well on the lift pump side of the moter

AndysFords · #5 (**permalink**) 10-28-2009, 07:40 PM

I have used both, had good luck with the gasser one, 12s I have one on my 84 thats been there 3 or 4 years and still works. I put the 12d on my 88 a month ago and it went bad the night before last. The 12s was on this truck before that and it lasted about 2 months. They key to their survival is DO NOT LET THEM RUN DRY. Every time my truck runs out of fuel (I don't have a fuel gauge), the pump goes bad. Other pumps I have had work fine after being run dry. The 12d will not keep up with my truck unless it has a brand new fuel filter on it. Manual fuel pumps are better than electric at pushing fuel through semiblocked fuel filters. with a manual pump, when the filter gets stopped I can drive it to the parts house to get another one, it just surges and drives slower but with an electric fuel pump I never notice a problem until the truck quits going down the road. I finally put two fuel pumps one after the other on my truck and it runs great now, plus its really nice like the other night when the 12d went out, the other pump was still running and it got me back to O'Reilly's where they gave me another one.
I, however am limited to electric on my 88 because someone before me put the lift pump in wrong and ruined the cam shaft lobe that runs the fuel pump. I would much rather have a manual pump, I left the manual pump and put the electric pump on a switch for priming the fuel system when I needed to on my 84 and this works much better.

Marianna2003 · #6 (**permalink**) 10-29-2009, 09:45 PM

I'm using an electric fuel pump in series with the Mechcanical pump. It works great to prime the system. As far as saving power from the fuel pump? You'll never noticeit because you still have to generate the electrical power and the mechanical pump only flows what is needed. The cam pulls the diaphragm down and a spring pushes the fuel out. There is a lost motion link that allows the rocker arm to stay in contact with the eccentric to prevent a tapping noise.