I just purchased a 1990 Bass Buggy Tracker pontoon with a 60 hp Johnson , ive had this boat only about 2 weeks, been on water twice and it ran sweet. Today i slip her in and idle about 100 yards to main channel then progressivly throttle up and for a bit everything was fine ,then a sputter then died. Cranked it back up and runs for minute then dies again. I could throttle it up when i tried to crank it but it would just rev up then die. I got it to idle and run just enough to get back to harbor (bout 200 yards) at the dock it would just fire up then die,....last time before i loaded it it would just turn over. This boat has JUST went through a carb cleaning dur to trash and ethynal gas,and it ran great last time out ,then a 6 days later this is what happens. I was wondering if it could be that i top it off with gas everytime out,as i did today and added seafoam gas treatment . could this be the problem?....it just acts like it is trashy gas or somthing cuz it ran back to harbot but i had to throttle way up and only got a fraction of the power i normally get,..like its bogged. Any help would be GREATLY appreciated.