Briggs is pretty easy to figure out as long as you know what system you have, it can be tested using only a volt meter. The Kohler engines have the stator, a rectifier/regulator, and the diode, and you have to be able to identify the system you are working on. When I worked at the Kohler dealership we had specialty tools to aid us in the diagnoses, but even then I still had to pull out the book for that model. This is why I suggested that Steve take it to a Kohler dealer.