[Jack E/NJ]

>>>I currently have new a 3 wire, 10 SI on the engine but no matter what I do that thing puts out 15.0 to 15.5 volts>>>


Depends on where you're measuring it, on if you're using an analog or digital meter, on the ambient temperature. In the wintertime in Colorado I'd say that's in the right range. I'd rather have he 3-wire. You can always convert it to a 1-wire by pigtailing the 2nd sensing terminal directly to the bat output terminal and disconnect the 1st exciter terminal. The voltage should drop some at the battery terminal. Jack E/NJ