Have a motor with no fuel pump boss.Want to use a merc elec pump that I have # 861155-2 .Problem is I don't remember if this came off of a carbed or injection motor.I want to use it on a carbed motor. Does anyone know or have any input.Both the in and out ports are threaded, injection pumps I think only have one side threaded but not sure.JOHN SR

http://www.boatfix.com/merc/bullet/00/00_05.PDF

No Merc carbed engines used electric pumps.

They used them my neighbor has one.it's a 4.3 with a 2barrell JOHN SR

They never did it on a b/b . Always used the sea pump fuel pump combo
If its a b/b why not do it that way

Its a small block.Thanks someone rebuilt the motor and put a cam in with no lobe to run the fuel pump.LOLJOHN SR

GRIFF .....? My buddies 24 Outlaw w/ a 454 Carb has a electric fuel pump ?????????????????? Is it not a Merc motor ????

oh yes they did! ..the 220 hp 4.3 v6 vortec did..

My boat has a 515 BBC with a Aeromotive pump. You need to see what the Merc pump pressure is before trying to use it with a carb.
7 psi Max, or to 14 PSI with a fuel return line to the tank.
Ditch the Merc and get a 7 PSI Aeromotive pump.

I guess I should have said BBC Mercs. I know nothing about V6's or SBC's.


Most likely it was switched from the OEM mechanical fuel pump on the sea pump to an aftermarket electric pump.