 | Additional Information Magneto output tester. A reproduction of an original “ST. Louis Electric Works” magneto tester. Allows you to test your magneto’s output while it is still in the car, regardless of engine speed. High quality. Exact duplicate of an original tool. Likely the best magneto tester ever designed. Customers Who Bought This Item Also Bought FAQ There are currently no FAQ for this item. To ask a question about this item please press and fill out the form.  | Bookmark This Page Don't forget to bookmark us! |