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I think I posted something about this a couple weeks ago. On startup after sitting idle for a season this John Deere D140 riding mower with a B&S 24hp motor revved up so high I thought it was going to blow up. The governor went full throttle and would not go to an idle. I took the engine apart...

Particulars: John Deere riding lawnmower, D140, 22hp Briggs and Stratton engine. the mower was started after sitting for a season, and with the throttle in the low speed position the engine revved up so high it sounded like it was about to explode. Shut it down, repeated the start process and it...