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    Mariner 50 hp 4 stroke. Exhaust noise and hot spot on exhaust housing about 125mm below engine cover

    50hp Mariner 4 stroke. 106 hours. 2002-3 model. Headed out a few days ago. Engine started fine, idles fine. As I increased the throttle it seemed to develop a different exhaust noise. Best way to describe it would be to liken it to a car with a small hole in the muffler. Motored for 30mins...
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