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 continued with an extremely high RPM. It was as if the governor was stuck at WOT. Checked the linkage and the throttle worked normal, not stuck in the WOT position. Is there something about the governor internally that could fail and allow this to happen?
runaway engine
- Thread starter Gregyver
- Start date
- Joined
- Sep 24, 2017
- Threads
- 254
- Messages
- 6,498
yes. there is a governor gear, it uses centrifugal force to push a metal piece against your governor rod and governor arm, the faster it spins the more it tries to push your throttle closed, your governor spring tries to pull it open.
V-TWIN?
V-TWIN?
