[ndutton]

I understand you've decided the engine is beyond hope or otherwise possessed but for the mechanics you've hired to be unable to figure out what is essentially a lawn mower engine with a few more cylinders is more of a comment on the mechanics than the engine. Please realize that there were somewhere around 40,000 of these engines made with approximately 20,000 still in service many decades later. I appreciate these mechanics are professional but all that means is they charge for their services, not that they have the necessary experience or skills and frankly judging by the information you have provided, they don't. It's my opinion and I dare say an opinion shared by others on this forum that they've taken advantage of the situation. Too bad they don't charge on the basis of results instead of unskilled hours.

The mechanic(s) removed the head multiple times? That's ridiculous. If it truly needed to be removed a second time it means they didn't do the job right the first time.

As for no market for a C30 with an A4, consider that the boat is 35 ~ 40 years old so there was no market when you bought it. No surprise there. As an example, I bought my C30 thirteen years ago in sailing condition (meaning complete) with a running engine for $5K. There's your market. What I get out of the purchase and subsequent years of ownership is pleasure equity, not $$.

What I want for you
Either find the skilled local support you so desperately need to be able to enjoy this boat or rid yourself of the aggravation. This is supposed to be fun.