Ok, I have just taken on an 84 Sierra ski boat with a 165 HP mercruiser stern drive and it runs and looks great. Very well taken care of. I have been looking for days trying to find information about the boat and even in nada blue book and other sources I never can seem to find my exact boat anywhere. I realize that Sierra changed hands a few times but what gives. Anyone know anything about these boats? Mine is like I said an 84 Sierra, closed bow, 18 foot, with above engine. I have a pic posted. Can anybody tell me if this is a decent boat or what to watch for. it seems really nice.