I'm looking at an 86' Starcraft Open bow I/O, 14o hp, 3L, OMC ski boat. The owner says that it has only been run 3 times over the past few years, which I know is not good. He says it runs fine when you crank it, but once the choke cuts off it sputters and blows black smoke. What could this mean about the motor? Does it sound like a fixable problem?<br /><br />Also, how big of a job is it to repair the interior on these boats? <br /><br />Thanks