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  1. H

    25hp Johnson won't run at at full throttle

    New Plug but I am waiting on the local shop as I thought weak fire might be part, if not all of the problem. Thanks. I'll let you know the results.
  2. H

    25hp Johnson won't run at at full throttle

    Problem: My 2006 5 HP Mercury Outboard started easily and idled perfectly first trip this year. Wouldn't rev to full power. Assumed Ethanol affected carb or small amout of gas left from previous year. Cleaned carb and replaced, same problem. Installed new carb, same problem. Replaced exterior...
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