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Qusetion??? On my 93 454 mag I have a Weber carb that after sitting the bowls seem to drain back down, making for a tough start. Does anyone know are the newer Weber carbs subject to the same problem?? I have a chance to get a good deal on a 97 carb, but no sense changing if I'm not going to solve the issue.

Thanks Brian

Airpacker

You have a Webber carb on a 454 chevy?
Where did that come from. A stock 454 would have a Q-Jet on it. Post a pic of this carb please.

P.S. is your boat a 230 conquest?

ragtop409

some were around 1990 Mercruiser was forced t switch to the weber carb because GM stoped production of the Q-Jet a few years prior. PQ do a search there has been much chat hereabout that problem what it really is and the best and not so best ways to fix it. And last no, the 97 will not be any better. Now some of the 502 Mags did come with a 750cfm unlike the 600cfm you have now. Rag's

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Airpacker, You are correct on the 23' Conquest. And yes it did come with a weber from the factory. I bought a Mercruiser electric fuel pump to install to correct the sitting problem. But after doing a little research on the install, seems to be more work than it worth. Simply found a good deal on a newer Weber and thought maybe they corrected the problem but based on Rags response "NO GO". Oh well not a total loss! Anyone needing a new electric fuel pump I'll let it go cheap!

Thanks again!!!

Griff

My carb on my '93 454 Mag was a Weber also. I have heard this was a common problem, but really never had any problems with mine. I did some mods and went to a Holley 800. I do still have this carb, if you want it. $50 to your door. You could have it rebuilt and gone through and not have the down time of having to get yours done.

Waterfoul

23Conquest, where in Michigan are you? Where do you boat?

I'm not all that familiar with the Weber carb, but if the flange is the same as a Holley, or there is an adapter (like there is for a Q-jet) you might consider switching. There are a lot of people holding on to older Holley's too......after upgrades and such....you might have better luck finding one of these than trying another Weber (sorry Griff!!).

I'm in Grand Rapids and boat a lot out of Grand Haven, Muskegon, and Holland. Let me know if I can help.

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Waterfoul, I'm out of St. Joseph, just South of you. We normally
make several runs to South Haven as well as trailer up to Holland a few times. What are you running??

Waterfoul

I run a 24 Baja Sport. If you are going as far as Holland by trailer, skip it and go to Grand Haven instead. Much more powerboat friendly.

RLW

The Weber AFB (aluminum four barrel) is notorious for the starting problems you are encountering. I had one myself and regardless of a rebuild, it continued to give me problems.
Go with the appropriate size Holley.

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Been to Grand Haven many of times with my Scarab. Yet to take the Powerquest there as of yet. Sold my Scarab about 6 years ago (fast but what a piece of junk compared to the PQ), and just bought the PQ last summer. It feels good to be back on the water!!