Capt J, Amazing isn't it. Many boat owners don't understand or want to understand their motors. They know that it can reach a cruise rpm and it isn't overheating. Why fix something if it isn't broke? Maybe ignorant bliss works for them. At least he changed the oil regularly. One of the first things I did was buy the CAT manual for theses motors. The risk buying any used boat is having to wonder how it and it's machinery room was cared for. You do your due diligence surveys and cross your fingers. It's always a risk. The good news is your are paying significant less than "new"retail for the boat. I could never afford one of these boats new. Thanks for all your comments.