Re: 75 hp underpowered for 16' boat?
Rebuild schedule is the same as any other outboard.<br />If it is kept maintained, tuned, waterpump / impeller kept in good working order, and not abused, it should last 2000-3000 hours.<br /><br />There are lots of old outboards from the 60's and 70's that are still going strong.<br /><br />This motor has little in common with the Force motors from 1993 or earlier.<br />Almost every part is of Mercury or Mariner origin, except the block itself.<br /><br />I would expect low to mid thirties for speed. You will not be happy with it if you load it down with 6 people and picnic gear.<br />But fine for 2-4 people.<br /><br />Have the enging checked out, get some compression readings, and take her for a half hour test drive.<br /><br />Happy Boating.