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  1. GN7 On the Dyno
    My Dad has a 39' Bayliner with twin Cummins 5.9 6BTA 330hp diesels with 800-900 hours. This is their third diesel powered boat, however this is the first one to have an issue with a bit (just barely visable) of black smoke in the exhaust and black soot (more than a bit) on the transom. They...
  2. GN7 On the Dyno
    Trying to understand a few things. First is a Radian. In reading the Wikipedia page on it... The radius of a circle, in engine terms would be half the stroke, as the connecting rod journal axis creates a revolution, it makes a circle. A 4" stroke will create a 4" circle and the radius of...
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