50 hp johnson on a pontoon. About a 1985 model. Well taken care of, and used about 20 times a year but does set up during the winter. Last year it had some power issues so this year we took it to a very reputable repair center (has worked on this unit before) He serviced the unit and I believe rebuilt one carb and replace the other. It runs great at WOT but will die at idle. We took it back and after a few days were told that most likely the lower rings were bad. Upper rings were ok because it had good compression. The unit would idle before the carb work, just ran crappy. Could it be a sync problem, how likely is a ring problem? Suggestions??
