How do you know if your CDI unit is failing? Is their any way to test it to see of it is working properly? I get an intermittent sputter under a load not quit on plane but if I hold the throttle open enough just to keep the bow of the boat up but not on plane my engine has a sputter/miss. I changed the plugs and gaped them at .40,cleaned and rebuilt the carbs. Those CDI units are like 500 bucks,I hope its not going bad. Other than that it has plenty of power and idles perfectly. I just did a complete 100% rebuild on this engine and it has even compression on all cylinders.What could be causing my miss or sputter?

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