On Thu, 10 Jul 2008 06:41:02 -0700 (PDT), richard
wrote:

at this point they are not sure
what the problem is and are recomending a new engine.

A new engine is not usually cost effective on an older boat but a
rebuilt short block is probably within reach - maybe $5K or so with
installation.

It's possible that your heads are rusted out however and may need to
be replaced. That would dictate a rebuilt long block which will cost
somewhat more.