Well we could find out if somebody will post the specs and we can compare apples to apples.

I'd like to hear some more people who runs those engines in their stock version, not marinezed... Any one else having success ?

Old topic but still interesting.
We are always looking for reasonably priced HP.

I thought this was an interesting read - talks about Marine crate engines.
http://www.truckinweb.com/newproduct...crate_engines/

I also found a link to this site on another website - a marinized 572.
http://www.flagshipengine.com/

Anyone else still having great success with a stock 572-620?

5050 used to run them

Flagship has very high prices.

Crate sounds good in a smaller fresh water boat like a Donzi 22 where it does not have to work too hard..

Thats what i think also...

i tore into mine mainly cause I bought them used. but really main changes valve spring need changed to much pressure for hyd roller spinning 5400 for very long at all, can’t remember open pressure but mine stock had #195 on the seat, I’d run a better ignition system, and I’d run quickfuel 1050 and I would put a nice marine oil pan and run water and oil thermostats. I am always looking for them used sometimes pick them up for around $7500 used tear it down hone it rings n bearings.

Ask FULL FORCE here on the boards about clearances.He made the mistake of not checking clearances before putting 2 really expensive engines in his boat....MANY folks have had clearance problems when they dont set an engine up for marine use. Clearances are important in a marine engine. Not saying you wont have success with just throwing any old engine in a boat. But when running an engine hard for longer periods of time and the engine starts building heat, things like pistons and valves expand. If there isnt enough clearance for these things to expand, things can begin to seize. Without checking for these clearances BEFORE you put an engine in a boat, you are running the risk of a failure in an engine that lots of boaters like to refer to as CATASTROPHIC FAILURE !!!!!! Happens all the time... Again, not sayin you wont get lucky, but it is way safer to do it right the first time.