Hello. I'm new to this forum. in fact this is my first post. My Dad has had a 1972 Mark twain 16 ft. Vsonic since 94. It has sat in his barn for the last 10 yrs. After years of bugging him, he finally told me to come get it. The hull has a new floor and gel coat done just before storage. The motor is a 1990 merc. 60 horse outboard with low hours. My dad was told by a marina the repaired the power trim that it was a belgian motor and would not be able to get parts for it after that repair. After talking to the factory I now see that statement was incorrect. It was originally sold in Sturgeon Bay WI.l Anway. I drained the carbs to find an oily substance that didn't smell like old gas. Is there something to put in the carbs like that for storage? either way after draining them I tried starting it and it actually ran like it was used 2 days prior and hasn't skipped a beat. I also replaced the impeller before launching. I worked 10 yrs. as an auto mechanic, and have never seen something sit that long and run like that with no carb work.