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    2003 mercruiser 4.3 issues

    Swapped plugs and it runs like a champ now. Thanks everyone
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    2003 mercruiser 4.3 issues

    Blue spark. Tested plugs with a spark tester. Did the same with lead coming from the coil.
  3. T

    2003 mercruiser 4.3 issues

    Ok. After diagnostics I found I needed a new ignition sensor. Replaced that, cap, rotor,wires and now I have great spark. Still no starting even with starter fluid. I'm at a loss. Maybe fouled plugs could stop it from starting?
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    2003 mercruiser 4.3 issues

    So I have 12 volts to the positive side of the coil. When I pulled the red/white wire off of the ignition sensor I only showed .2 volts. This should indicate a pad sensor right? It should show 12v without cranking it?
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    2003 mercruiser 4.3 issues

    Thunderbolt v. There are only 2 wires going to the coil. 1 purple and one grey. Should there be an additional for the tach?
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    2003 mercruiser 4.3 issues

    Hello. I have a beautiful 2003 rinker 192. 4.3 mercruiser. Last year it started to have issues running. It would start then quickly die and have a terrible time starting but would die and start a few times until it would start and run like a champ all day. Doesn't seem to be fuel because the...
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