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  1. M

    mercury 500 half power

    this is a new reply to my mercury 500 with half power. i finally got a chance to look at it good today and i realized that the bottom plug is milky when i pull it out. obviously water in that cylinder. but the question is how could it be getting in there? also i ran the motor out of the water...
  2. M

    half power out of 50 hp mercury

    hi, hopefully i can get some good help from someone on here since the guy that supposedly fixed my engine couldnt. ive got a mercury 500 50 hp thunderbolt ignition, and it only seems to have half power. i pulled the bottom two plugs out and it didnt make a change at all in how the motor ran, so...
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