Atomic 4 1973 freshwater life expectancy?

[Robynredsail]

Looking to buy a 28 Sabre 1973, well maintained freshwater NE USA lake boat. 3-4 k for boat. Boat looks solid and in good condition. Motor is nice gold color and looks quite clean. ( fire reatarder filter thing looked oily thou) .

How long can a well maintained atomic 4 live though? This one is 45 yrs old. hmmm?
How do I evaluate motor? Compression test, oil pressure, and ?. It’s on hard now, but I’d want to put it into water for a test. However I do that... full throttle into wind? Owner has had it for 18 yrs. probably used little as he sails well. He states it needs a tune up.
Thank you in advance. Looking to possible buy very soon.
Robyn

[Bill Seal]

If the compression and oil pressure are good, that thing should run forever.
It has no center main, so the oil to #2&3 rod journals has to make it past #1 & #4.
Don't run it for long periods at low RPM resulting in low oil pressure. (voice of experience).

[Time2Go]

Moyer Marine is your friend
Cheers
Neil