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    Thunderbolt IV ignition problems. 3 coils in 2 days.

    I have a 1990 Mercruiser 5.0LX with an Alpha 1 Gen 1 outdrive. My ignition system is a Thunderbolt IV system. This is a new too me boat so I dont know what has been done to the boat. Day1: Put the boat in the water ran it all day with only a few misses here and there. The engine sputtered and...
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    Problems.....

    Hello, I have a 1990 Bayliner with a 5.0L LX motor. I bought it 2 months ago. The motor ran great at first but then started to stall and sputter after a few hours. The engine became difficult to start after that. Once it started, if I kept the RPMs below 2400 the engine would run fine. I though...
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