if im not mistaken, the 152" motor is that 3.0L omc cobra 4cyl right?

Reid

You should have bought a bilge blower too while you were at it .

-beerjet-

i totaly agree with you on that but its funny becouse my buddy owns a 2006 23 ultra stealth that he bought new  from ultra it came with a 6al street version box and dist all msd non marine and has a holly Blue pump  all from the factory and he has not had any probs on my boat i ran all street stuff becouse i had to they dont make enough high perf stuff in the marine side you cant get an elec fuel pump that flow 2500 gph or a spark hot enough to light the fire just my op

That sounds like the 2.5L Mercruiser (used MANY of the same parts as the 3.0L)

I was talking to my freind this morning and he has to replace the mechanical fuel pump on his houseboat this weekend.

He proceeded to tell me something shortly thereafter that made we want to smack him in the back of the head.

He told me the "marine" fuel pump was way to expensive for his 130hp 152" I4 "Iron Duke" (the little Chevy II) and that he was just going to buy a rebuilt Kragen special and go up there and put it on. I told him it had to be a "marine" approved pump with an SAE J117 sticker on it to be safe/legal because it has failure protection on it that literally kills the engine if it fails.

He then tells me the fuel pump costs $118.00, so I said "and", he then tells me he can get a Kragen special for $58.00, so I handed him $60.00 and said I'm buying your stupid life. He just smiled and handed my money back. He said he had to go order the "marine" pump.


In a closed engine compartment boat, do NOT ever cheat when it comes to USCG rated fuel/electical parts for the boat, this was a house boat that sleeps 12, think about that for a second...


A marine specific fuel pump (mechanical) has two diaphrams, one that pumps fuel into the bowl of the carb, and another heavier diaphram that floods the engine if the primary fails, killing the motor and ultimately the fuel flow. That is what that clear or yellow hose to the flame arrestor is for.

Sorry for the rant, but seemed relavent.

Joe, first off exellent question, the small port on the pump will "pulse" air back and forth while the engine is running, really wont cause any issues with how the engine runs, the line should run up to the flame arrestor and into the throat of the carb, this will kill or flood the engine out to shut the boat down without spilling one drop of fuel in the bilge area, hopefully preventing a fire or other hazardous condition.

Hopefully this answers your question, BTW I always use clear tubing for that line to be able to see if there is any fuel in there, just make sure it's compatible with gas.

GT