Electric Fuel pump

[jrchas]

I am rebuilding a 28' 1972 Winner with two 5.7L GM motors. I have the motors out and trying to decide whether to switch over to electric fuel pumps or not. Both motors are 2004 models. I have seen so many different pumps with different pressures/GPH that I am not sure what to go with. Any suggestions on pumps? Thanks in advance

 

[RogersJetboat454]

Re: Electric Fuel pump

I am rebuilding a 28' 1972 Winner with two 5.7L GM motors. I have the motors out and trying to decide whether to switch over to electric fuel pumps or not. Both motors are 2004 models. I have seen so many different pumps with different pressures/GPH that I am not sure what to go with. Any suggestions on pumps? Thanks in advance

Welcome to iboats.

First point... What ever you use must be marine/USCG certified. Resist the urge to use the cheap junk off the auto parts self, as they may leave you with a big hole in hull (and you) once the fire from the explosion is out.

Second point... What are you working with? Carbureted? Fuel injected? Who marinized the engines? Merc? Volvo? PCM? Etc...

Third point... You say they are 2004 engines. I could be mistaken, but a 2004 marine engine is not going to have a provision to use old mechanical fuel pumps. Unless you are using GM automotive crate engines such as the 290 HP, 2 piece RMS, non-vortec engines...

If they are in fact true marine engines, I would probably use what ever configuration the original manufacturer used for pumps, and adapt them to your boat.

 

[sdowney717]

Re: Electric Fuel pump

If your carbureted then
Holley Red Marine or the Carter electric.
http://www.summitracing.com/search/...Rotary-Vane-Electric-Fuel-Pumps/?autoview=SKU
Put a Holley fuel regulator right after the pump. I run mine about 3 to 4 psi.
And I have a PSI gauge permanently mounted on the regulator. Even though these pumps claim to not need a regulator, I have seen them fail in a high pressure mode when their internal regulators fail from e10 or rust etc....
USCG says pressurized fuel line cant be longer then 48 inches and electric pumps need to be 12 inches or closer to engine.

Also need a safety cut off oil pressure switch which will kill the pump if motor is not running.
I also added a momentary switch as a primer aid in filling the carbs.

I also added a relay which is not needed.

 

[2000harleydeuce]

Re: Electric Fuel pump

Hey guys! I also have a fuel pump question. What is the fuel pump pressure for 1993 omc 4.3L v6 cobra with carburetor? Thanks!!

 

[Don S]

Re: Electric Fuel pump

You need to start a new thread of your own, and start it over in the OMC forum.