I ordered a rectifier regulator part # 25 403 35 S. that should have been AC B+ AC instead I received one marked AC B+ B+ on the three prongs . It did not work for me and I ordered another but I am curious is this stamped wrong or does this actually exist for other engines . I ordered from Amazon with free overnight shipping and was fully refunded .I ordered another from a small engine shop about 30 miles away . It will be 5 to 7 days for delivery to the store . I could not find one with AC B+B+ anywhere online so it just got my mind stuck on learning is it the wrong part or a manufacturing error .