You were spot on checked spring. When I replaced carb of hooked up spring wrong causing there to be no tension on the spring. Mower fired up and ran well. Thanks so much
My sons d105 keep breaking compressed spring screw on variable speed pulley. owner was 10 years old. Great shape low hrs. John Deere told him it was not worth fixing lap told him mower only has 2 belts. There are three. root cause may have been severely worn belt from transmission to front...