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    Losing power after running full throttle. (Even after cleaning carb)

    I'm baffled by my 3.5 mercury 4 stroke. The ongoing problem is that it runs fine for maybe 15-20 minutes on full throttle then it starts shutting down and won't run any higher than half throttle. Spent yesterday working on it. New spark plug, changed the oil, and most importantly disassembled...
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