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  1. M

    Craftsman YS4500 Briggs and Stratton 21HP Intek Single Cylinder Problem

    Thanks to all for your help!
  2. M

    Craftsman YS4500 Briggs and Stratton 21HP Intek Single Cylinder Problem

    Ah - okay I will torque it to 110 ft-lbs - but not sure about the key part # you mention? I got the part from a local supplier - and the same one I see listed: Part #222698S. I had actually looked for the washer on the parts diagram but it is not shown for this engine. THanks!
  3. M

    Craftsman YS4500 Briggs and Stratton 21HP Intek Single Cylinder Problem

    UPDATE #8763: She Runs PERFECTLY! I rekeyed the flywheel ensuring it slid in all the way and torqued it down to 100 ft-lbs. Since the timing was about 180 out I rechecked valve clearances, etc. Mower still would not start. I went ahead and installed the new Walbro I had purchased and still...
  4. M

    Craftsman YS4500 Briggs and Stratton 21HP Intek Single Cylinder Problem

    @scrubcadet - you know that may be the cause of why it sheared because I tightened it down but not to the 100ft-lbs spec. I was going to torque it later when I got the lower pulley back on. Also, the key did not slide in freely I had to tap it in and I thought at the time that was not good on...
  5. M

    Craftsman YS4500 Briggs and Stratton 21HP Intek Single Cylinder Problem

    Update - one of my pet peeves on these forums is when people don't reply or update their questions so that others may profit from their findings and experience. So, I hope the hours of frustration I spent chasing down a rabbit hole will help somone else. I finally found the cause of the...
  6. M

    Craftsman YS4500 Briggs and Stratton 21HP Intek Single Cylinder Problem

    Yes I did remove the flywheel and I replaced the key. Rivets - thanks for the link to the manual - that is great to have. Update: I finally got it to start again after removing the small black stopper on the carb solenoid plunger. I cleaned the plunger well with carb cleaner and can hear it...
  7. M

    Craftsman YS4500 Briggs and Stratton 21HP Intek Single Cylinder Problem

    Hi - okay - I am attaching pics of the throttle and choke carb levers with throttle control lever pushed all the way forward (choke) and all the way back) - and also showing the governor lever (forward and back) - now that I look again I do see the governor lever moving forward and back and...
  8. M

    Craftsman YS4500 Briggs and Stratton 21HP Intek Single Cylinder Problem

    Briggs & Stratton 331877 21HP Intek Single Cylinder Hi all - I am new to this site because I need some help with getting my riding mower to start. Here is the situation: I rebuilt the engine after the camshaft broke. New camshaft, new governor, new (uised) sump, new gasket, etc. I followed...
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