Marine carburetor

[Arne3680]

Hello

I'm planning to install a new carb on my '78 AS.
It's fitted with a 351 windsor engine.

My uncle once installed a automotive carb on it (a Holley 1850-9)

I now want to install a proper marine carb.
I searched the web, and I think I will need the Holley 0-80319-1.
Can someone confirm this for me? (Engine number is D5JE, so I gues from the year '75)

I will also need an new flame arrestor. Because the one I have now is too low.
But what is the difference between the Flame arrestor for 2 hoses and the one for one hose?
I know one of the 2 hoses would be for the fuel pump, but why?

And where would someone recommend me to buy this item?
i live in Belgium (Europe), and my local dealer asks (€665 = $907!!)

I guess I will need new gaskets for my valve covers.
i think they're leaking oil. (see picture below)





Kind regards!

[shyskier]

Ron has recommended holley 600 or 650 c.f.m. not sure what the part # would be. Ron or Dan may help there. flame arestor too low? why? should fit on either carb. hose to fuel pump is to vent fumes from leaking fuel pump diaphragm to carb instead of engine compartment. I don't know what other hose would be for, poss. crankcase breather? may be able to tighten valve cover bolts. don't over tighten. I wold guess about 15nm. but gaskets look old & are cheap & easy to replace. talk to Ron or Dan for any parts needed. your auto parts store should be able to get most engine parts if they have access to u.s. parts.

[Arne3680]

Ron has recommended holley 600 or 650 c.f.m. not sure what the part # would be. Ron or Dan may help there. flame arestor too low? why? should fit on either carb. hose to fuel pump is to vent fumes from leaking fuel pump diaphragm to carb instead of engine compartment. I don't know what other hose would be for, poss. crankcase breather? may be able to tighten valve cover bolts. don't over tighten. I wold guess about 15nm. but gaskets look old & are cheap & easy to replace. talk to Ron or Dan for any parts needed. your auto parts store should be able to get most engine parts if they have access to u.s. parts.

I have got a 600CFM carb right now.
The flame arrestor is too low because I have an automotive car.
A marine carb has bend vacuum pipes.

A local dealer told me to check the acceleration pump.
It could be too loose or too tight.
Going to try that in the weekend.

[RonT]

Holley 4160 style 600 cfm 4-barrel Marine carb is OEM for nearly all 350/351 Marine engines (Mercruiser used some Carters) these are vacuum operated secondaries, with electric chokes. I don't recall that the marine "J" vent tubes stuck up much higher than the straight automotive ones, I haven't measured the thickness of our old flame arresters lately  but I think they were nearly 2" thick. I have seen tall flame arresters that were around 4" high but i doubt they will fit under the motor box. Tubes running up to the flame arrester are for the valve cover crank-case vent (s) and small vent hose from the mechanical fuel pump.