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Old 10-16-2021, 03:18 PM   #6
CP241
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Default Re: 1986 Marathon. No power unless muffler removed

You have to keep in mind, it is a 2 stroke. It needs that back pressure in the muffler to run right. You can’t just go put on any ol muffler and expect it to run like it should. You may be able to adjust the carb and make it work… but with an opened muffler and stock carb jetting it’s gonna run crazy lean and not last long
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