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    Timing Mercruiser 305 5L

    I am trying to set the timing on my 1991 mercruiser 305 5L but I do not have the wiring diagram. I know that on GM SBC you have to disconnect the tan wire to bring it to zero, but there is no tan wire coming out of the ICM. <br /><br />Does anyone know which wire to disconnect when setting the...
  2. A

    Timing Mercruiser 305 5L

    I am trying to set the timing on my 1991 mercruiser 305 5L but I do not have the wiring diagram. I know that on GM SBC you have to disconnect the tan wire to bring it to zero, but there is no tan wire coming out of the ICM. <br /><br />Does anyone know which wire to disconnect when setting the...
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