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    1993 20 hp mercury not running right.

    Motor won’t idle right and bogs down at full throttle and that’s when I’m running it at the lake. Will run ok at about half speed. I’ve cleaned the carbs about four times now and not any better. I can turn the idle up and it runs a little better but it’s to high to run that way. Plugs are...
  2. H

    1993 20 hp mercury bogs down at full throttle

    I’ve got a 1993 20hp mercury motor that has fire to both plugs, will idle but kinda sputters like it’s not a smooth idle, and will run half throttle, but when you go to throttle it full speed it just bogs down. Seems like it’s not firing right? Ive checked the basics. Checked the bulb on...
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