I know in the beggining of this thread that you posted that you normally did nost stuff because off all the self professed experts. I am not trying to be a self professed expert but the MSD HEI distributors have cost many problems, dollars and sleepless nights. The only people I know that have success with these distributors buy 2 pairs and change them every spring and send the used pair back to MSD for repair which is to much trouble for me. Please talk to Tyler about this before you buy these distributors.
I have had far better success with the stock distributors (yes one let me down this past year but it was 10 years old). Just this year I went with the DUI distributor and they have been flawless thus far but have not stood the test of time, so I will not tell you they are the greatest thing since sliced bread but will say they have already outlasted every MSD HEI distributor I have used (which has been 4 now).
You can Ignore this post (and I will even delete if you ask me too) but I feel that you are setting yourself up for more headache and expense for something I feel offers no gains. please do atleast a little research.
Allen

Nevermind, reread thread.....

TCBoss302,
You might consider reading the entire thread and I believe if you do you will be deleting your above post.
Allen

LMAO!!!!!

Im not that smart tho.....lol.

Sound's like it's going lean. old rear motor had same problrem, I would look at wiring harness and grounds maybey bad voltage on that motors system? you stated ran fine on dyno so that would lead me to belive boat system related.

Thank you Allan...real world experience is very helpfull. I will relay info to Tyler. I honestly dont know which way to turn. I just want the boat to run....and do so for more than 7 minutes before it blows up. lol. Im confident that Tyler will work the issues out. He has been building hi-perf boat engines for over 30yrs...Maybe we just have bad luck.

Thanks, reread thread.

Me too. I've spent more on f*king with the engines that I did to buy the boat, on both my last 2 boats. I think I've learned that boats should have boat engines (outboards) or truck engines (diesels), not car engines. They just don't hold up to the sustained load. Think about it: the dyno runs last seconds, and that was OK. Put it in the boat and run for minutes and it blows up (of course you want it to run for hundreds of hours).

These leaks can be caused by inconsistent heating, particularly across the top of the block and the head, combined with very high cylinder pressures. Getting the temperature consistent is not easy. The German car manufacturers need to do this because the Autobahns allow people to cruise at high speed (high load) for extended periods of time. There are very few non-German cars in the left lane on the autobahn. Ferraris? Vettes? Jaguars? Nope. BMWs, Porsche, Mercedes, Opel, VW, yes. I've seen so many GM V8s blown up on the side of the autobahn its bizarre, considering there are hardly any at all over there.

Over the past several decades of owning power and sail boats, and sometimes running serious yachts for much more wealthy individuals, I've seen that maintenance is about 10% to 20% of new boat cost per year.

But I still expect maintenance to be as on a car or house (a very small percentage of original cost). My expectations do not meet my experience...

I've always gone with stock Merc and now Ilmor engines so I've never had a custom engine made. Stupid question here: when you pay a custom builder to put together engines like this- and they grenade on the test run- who eats the cost of fixing the engine: the customer, engine builder, or do you split it?

Now that's an interesting question, one that just beggs for an interesting answer.