A used boat
is like a used car. Much of its future life depends on the care it had in the past. The brand of equipment and the manufacturers reputation is how to predict additional life. If you don't know, ask the people that repair marine
engines and equipment. Most OEM watermaker
companies use propriety pumps, filters and membranes. You're better off with one from Cruise
RO that use standard pieces you can buy anywhere.
How you treat your engines has a lot to do with their life. Clean oil
, and avoiding excessive rpm
. Go a little slower and double the life.
I've been on the water
my whole life and learned the brands/equipment that are reliable and cost effective to repair and the equipment that isn't. I bought my current
boat largely because of the Detroit Diesels. My main engines were made in 1947 and I believe overhauled only once. When I did it. I assume, with care, they're good for another 70 years.