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I have a B & S 19.5hp 31P677 on my John Deere lawn tractor. It wouldn't start because the compression release mechanism on the cam shaft had come apart. I have put a new cam shaft in along with tappets and adjusted the valves to factory specs. I had a bit of a problem getting the timing marks to...

Mark transmission drive belt is slipping, even after I replaced it. I have checked the pulleys and they are in good shape, any ideas!