If we're talking gas these are the tall block gm motors. Chevy big block
with a taller deck and longer stroke to make 500ci. I've never hear of any
problems, most racers are using these blocks.

"snor" wrote in message
...
I am interested in a 39 foot 2002 boat. It has a pair of Mercruiser 8.1 375
HP engines. I heard second handed that this particular engine has had
problems. Can anyone confirm this?