I do not beat myself up any more. The boat can do more probably. But I can't anymore. 4200-4500 rpm 20-25mph on the boat depending on tide etc. I'm good with it
most surveyors wont thoroughly check out the motor, need to get a certified mechanic for that. They will look at the hull, electrical, hoses, etc and perform a sea trial .
good luck
good looking Grady take it on a sea trial. or pay a surveyor to do it for you. also you can get the motor checked by qualified yam tech. its a lot of cash.. wise to spend a little and get it looked over.