Doug, my point was simply to reconfirm the importance of ridding water from an engine. Run it hot, change oil often. Run a good pcv. Also pays to be choosy regarding the oil you use. Some are more prone to creating acid than others due to the base oils.
In the case of marine engines, 225 for four strokes, 200 for two strokes.
My 10,320ci two strokes cruise at 166 water temp, 190 oil temp, 550egt.
Generally tho two strokes need to be on the cooler side than normal due to seeing combustion every time the piston goes down. So more localized heat, greater oil and water flow to carry it.
The mains here currently have 35,000 hours since last overhaul. Last time I checked bearings and retorqued was when I changed the oil, 10,000 hours ago.
Fun fact about the oil I run here, no zddp. Even 10ppm is enough that we’d have to change it. Any more and the silver coated bearings overheat and make crankcase explosions (trust me, they suck)