I am asking for a friend so I don't know everything about the motor. Here is what I do know: It is 135HP Merc 2 stroke purchased new in 87-89. I don't know how many hours it has , but the hours are low as it has only been run a couple of times in the last 10 years. Even when it was new, I don't think the owner was a heavy user. I don't know much about outboards other than they are durable. What should be done to the motor before using it? Does it need to be gone through, or just tune it up and go? Thanks in advance for your input!!