If you buy a new boat motor, or say buy one that is 5 or 10 years's old and been very well taken care of how long could you expect to get performence out of it? Would a 200hp last longer than a 5hp? or vice-a-versa? Is 30 years reasonable? This is assuming all the conditions are right for the boat motors.<br />Thanks for any idea's or thought's on this question, thanks and as always "peace"