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  1. I

    1988 Merc 5.0 thunderbolt IV TIMMING

    [okay it cut to the chase I have a 1988 mercruiser stern drive 5.0 with the thunderbolt for ignition the secondary ignition module is the 24 for the timing I went to start it one day and I had no spark so I replaced the coil the distributor interior parts new rotor cap and rotor and I still had...
  2. I

    1988 merc crusier 305 5.0 stern drive 2 barrel carb

    I need somebody to direct me on how to check the ECM or the spark control module. I've been told two different ways and one way it shows bad the other way it shows good if the expensive module and is there another way of eliminating that module and going to a HEI distributor or something because...
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