Re: sea ray
Only help I can provide is years ago, a friend of mine had an 18' deep V with a 165 hp I/O inline 6. Don't know how that relates to todays ratings, but a V8 at the time was 188 hp and it was a 302 cu in. Guessing the 165 was a Chev or Ford 250-300 cu in so that would relate to something less than 5 liter as I recall the 302 V8 was later reclassified as a 5 liter.
He could only do 45mph with 4 of us aboard.....Ha! A superb boat in finish and performance.
Just pulled out my cross reference table and Liters to CU is CU/61.02. So the inline 6 if a 250 cu in (Chev) was 4.1 liters and if Ford probably a 300 cu in which is 4.9 liters.
I can't get your post back up while typing this response so I have do reply from memory. I think you said that you were looking at a 24' with a 5 liter engine. Considering a boat of that size would have some sort of cabin and would be hauling around possibly half a dozen folks, the a 5 liter may only get you in the 25 mph range at WOT and with water toys, you could have some problems.
Always have to ask the embarrassing question and that is, WHY is the seller selling it, really????? Performance? If so, you too may be turning it around after the first few outings.
HTH,
Mark