Ok what and when is a major overhaul on a 60 2 stroke merc ? No such thing mate a service is a service and they don’t get a major overhaul, what would they do . You have no idea [emoji362] obviously by these and your previous comments . A thousand hours is NOTHING ain the life of a motor . Get some knowledge go and work in a engine building shop or go and talk to a marine mechanic, I’ll call you for an bush mechanic , give it a break and go back to getting one of your projects done [emoji41]. Take care on the water . Matt