[ScottM]

Just spoke with a buddy of mine that had the same engine. Right before he toasted a cylinder 4 years ago, he was trimming the engine while underway and had the same surging/bogging symptoms. The mechanic said the cause of the engine blowing was lack of oil to one cylinder due to a clog in the carb, but as to why the trim had an effect on the engine bogging remains a mystery. Needless to say I'll be talking with my mechanic tomorrow.