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  1. N

    Stalls at dock, Won't restart

    Is there a test procedure? I know a brand new switch is unavailable because they no longer produce them. Are the ones on eBay reliable or is it a risk buying one? Thank you for your prompt reply btw.
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    Stalls at dock, Won't restart

    Hello Everyone, I'm hoping someone smarter than myself can point me in the right direction before calling the boat guy. I have a 91 Thompson 210 fisherman. Mercruiser 4.3 liter with thunderbolt ignition and alpha one drive. The last 2 times I have taken it out it has started and idled, runs...
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    Blown spark plug

    Ordered one this morning. Thank you for your help!
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    Blown spark plug

    Had it out prior to the plug blowing, ran rough on plane but trolled and trolled without issue. Idk. Where can I find a service manual besides a Seloc manual?
  5. N

    Blown spark plug

    The threads and nut for the plug are still in the cylinder which makes me believe your right about the detonation. How do I solve the lean condition? Is it a timing issue, carb or both? I'm going to try a solid tune up and carb rebuild before taking it in to our boat guy. Appreciate your help.
  6. N

    Blown spark plug

    Help!!! I have a 1991 Thompson fisherman with a Mercruiser 4.3 pre vortec with the thunderbolt ignition. I have 2 questions if anyone can help me diagnose a problem. What causes this motor to run rough under power but start and idle fine. And the 2nd most important question. What causes a spark...
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