Feul Pump recommendation?????

TexomaPowerboater · 04-09-2009, 12:14 PM

Shopping for fuel pumps, kind of new at this. I know enough to know that you dont wan't too little or too much pressure, but thats about it. I've got a 502 415hp marine long block, with 750 holley, and merlin dual plane intake. I need a fuel pump that mounts on top of the sea pump, like how the 500HP are set up. Does it matter which one or can I just get the same fuel pump merc uses on their 500HP's? I didn' know if that would be too much fuel pressure or not. Are there even any other options besides merc for the sea pump driven fuel pump?

Pismo10 · 04-09-2009, 02:04 PM

That pulley fuel pump is not very good, go with an Aeromotive Marine electric fuel pump and an adjustable regulator.

TexomaPowerboater · 04-09-2009, 05:03 PM

Really? What's wrong with them?

Old Navy · 04-09-2009, 06:37 PM

I put a KE billet bottom on my OEM Merc top, for the seapump mounted deal. It works very well, no regulator needed. Oh, and -8 lines, and I think CP Performance sells the whole pump if you want a complete set up. As far as fuel pumps, there are a ton of choices, this set up works for me.

Rookie · 04-09-2009, 08:19 PM

I had the seawater/fuel pumps feeding my Holley blues and then to my carbs. The seawater/fuel pumps needed to be rebuilt every year and some times probably during the middle of the season. I wiped out the cam lobe that runs the armature twice. (leaks fuel into the oil fill reservoir). I then went to just Holley blues, I now had to mount the Holleys a little below the fuel pick and works great. I now am going to change to Mallory marine 140, the same pump that I used on the dyno.
just my $0.02

MER Performance · 04-09-2009, 08:27 PM

This is what I use on applications such as yours. Call C.V. Products in Thomasville, NC ask for Dan Kent, tell him Mark from MER sent you , and that you want there Billet marine pump for a Merc water pump mount with the fuel press you want. It's 100% rebuild but, it's going to set you back almost $400.00

MER Performance · 04-09-2009, 08:33 PM

The pump is nickel plated, have vent line fitting ARP bolts and washers. You'll never have to replace that pump, if you want to switch it to a Gen IV just order the pump arm.

TexomaPowerboater · 04-09-2009, 10:41 PM

Thanks !

What psi should I be looking at for this engine setup? GPH?

Ghostrider · 04-10-2009, 04:13 AM

I run the Aeromotive Marine SS PN 027-11211, runs 140+ gph and is internally regulated to 7psi. Great pump, not too loud and doesn't get hot. I have always had drama's with mechanical pumps, besides, you can't turn the damn things off if you ever need to! I like having a kill switch for the pump as well as ignition.

Boatally Insane · 04-11-2009, 11:04 PM

The Carter "replacement" pump for the merc 861677T pump which is used on the 502's is rated for 42 gph @ 5.75 psi should be more than enough for you..

I ran a stock Merc seawater pump mounted fuel pump with the CV products bottom half (similar to the KE I believe) on a 600 hp 516 cid engine for years with NO problems whatsoever.....

Doug