Has anyone checked there floats that are not part of the Rotax service bulletin? I have a 912 that was installed in 1997 and does not fall in the S/N range. I had a float problem last year. I checked the floats in my carbs and also the old/bad set. None of them have the markings. I am going to contact Rotax. I hope I can get the floats paid for! 160.00 is a lot of flying time!