i recently purchased a 1994 nitro bass boat with a 150hp mercury. i was cleaning it up today and decided to check the air box for any debris, bugs and things like that and found a funny lookin fluid in the air box and around the openings for the carb. any body ever seen this before. when it starts it does seem to smoke a bit but only when it first starts and it is a 2 stroke. she runs real good when you put the throttle down i gps'd it at 55mph. i cleaned it out with carb spray and put everything back together will check after a couple runs to see if it comes back. i was thinking maybe some kind of fuel addititve or something. heres a pic