The bottom of the boat is farly clean...I only run it in fresh water (the only kind we have in Idaho) and the boat is never in the water overnight.

The fuel line leaks have been taken care of...that is a particularly dangerous situation; I agree.

Good that you're fixing the fuel leaks.

I just wanted to make sure you didn't have a "fouled" bottom that was causing a bunch of extra drag. Sounds like you are okay there.

And this will start a fight, but the Mercruiser EFI system on my boat is the EXACT SAME unit as on my 1990 Chevy Van. Still says "TBI" right on it. Also the distributor, distributor cap, and rotor are EXACTLY the same. Marine, schmarine!
If your repair doesn't hold, just get a marine carburetor and you'll not regret it.

Before you spend $500 for all that injection stuff, you might consider picking up one of these:



($130 brand new from Summit or cheaper on ebay)

and one of these for the top of it:



($336 from Summit, and it IS a marine carb)

You'll only have broken out HALF a thousand, and yer done with carb troubles...

FR, is that a Ford intake manifold pictured and priced?

it is! Summit brand, but probably made by Edlebrock...

Those Edelbrock carbs work great. Pretty much a direct replacement for the Carter AFB. In fact they are so similar I think Carter may be making them for Edelbrock.

I put one on an a Buick Vista Cruiser,(the coolest of the long roofs), a few years back and it was nearly perfectly tuned right out of the box. Five minutes later it was purring like a kitten. As I recall the Carter version was a bit cheaper. Don't know if it was marinized, or what marinizing would be on a carb.

Took her out today...
Same problem...get at about 2000 just barely on plain...advance the throttle and WAaarrrRRRrrrRRrrrrrrRRRR

I am going to call Holley on Monday and see where I can get a brand new carb of the same model.

I put her in neutral (in the water) and was able to get up to over 4,000 RPM. So the problem seems to be only under load. I think their is a boost valve?? (little screw thingy with a ruber diaphragm) in the carb that may have gone bad... (mechanic friend of mine thinks this may be the problem

Now, I put some Seafoam in the gas, and I was able to slowly bring her up to 3K, but that was about it...Something has to be plugged up in the carb.

That Edlebrock carb solution looks good...a new Holley carb would probably run me 500 bucks. Have to check the height on the intake manifold/carb and make sure it fits...

Holley DOES make a TBI kit that will fit an older 302.

Tempting...very tempting...I would never have another carb problem ever...Hmmmm...

http://store.summitracing.com/partdetail.asp?part=HLY%2D700%2D21&view=32&N=700+150+4294925061+4294907843&appfilter=1#Application

Forget that...I would have way too much money into it...needs a new 4V intake manifold.

The Eddleborock is a 4V Carb...I only want a 2V as I don't want to strain the old motor/outdrive.

I think I am going to go with a 500CFM Holley 2300 2V for $375. http://store.summitracing.com/partdetail.asp?part=HLY%2D0%2D80402%2D1&view=1&N=700+150+306083+

Hope my original intake manifold fits it.

If your current carb is a 2 barrel then that's the way to go, although it sounds like the Edelbrock 4 barrel and manifold are about the same price as the holley.

You should take the model number off the carb to make sure you get the direct replacement. That way the linkage will be on the same side and everything will fit. Try http://dougrussell.com/ They should have what you need.

Nevermind, I just looked and while they have carbs it isn't user freindly to look them up. You could give them a call and they may be able to help.

That 2bbl should work fine, might even be a direct replacment or at least it 'should fit' since you already have a Holley. Most Ford 2bbls are Autolite, and I'm sure Holley made their marine carb in '77 to fit Ford's existing manifold...

Well...

Replaced the carb..

STILL the same problem

I guess it is the fuel pump or the distributor.

I am going to have replaced half the boat by the time this is fixed

Have you checked compression?

Don't throw anything else at him, Hotbyte. He'll wanna change his compression now!


j/k phill. Good luck.

Actually I was remembering wrong problem...I had an old outboard for my john boat that would run fine in tank but wouldn't rev under load. Changed all the ignition parts (points, condenser, coil, etc) and it ran fine after that.