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  1. 9

    Mercury-No spark to one cylinder

    I have a 1988 15HP Mariner outboard (OC115390) that gets spark to one plug but not the other. There is a green/yellow wire that goes from the switch box to one coil and a green/white wire that goes from the switch box to the other coil. If I connect the green/yellow wire to each coil (one at a...
  2. 9

    15HP Mariner - Lack of spark to one cylinder

    I have a 1988 15HP Mariner outboard (OC115390) that gets spark to one plug but not the other. There is a green/yellow wire that goes from the switch box to one coil and a green/white wire that goes from the switch box to the other coil. If I connect the green/yellow wire to each coil (one at a...
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