2011 Ariens 21" push mower. Kohler Courage XT-6 engine.
Issue seems to have started all of a sudden.
When the engine is running, the governor arm goes back and forth like a dog's tail wagging. Warm or cold, idling or under load; does not seem to matter.
This mower has seen a lot of use, but I've taken very good care of it. It is clean and well maintained.
Some people love to hate on these, but it has been nearly flawless for me. The crank case base gasket started leaking a quite a bit, so I changed it. That is really all that I remember. Only ever had E-0 in it.
Has an auto choke with a bi-metallic spring on the muffler and a vacuum diaphragm. I tested both of those, they are working as they should.
At cold start, one pull gets it running and you can watch the choke plate slowly open to full after a few minutes.
Spark plug is clean. Zero oil consumption or smoke.
Only issue is the throttle plate goes back and forth from the governor.
Thoughts on a root cause?
Issue seems to have started all of a sudden.
When the engine is running, the governor arm goes back and forth like a dog's tail wagging. Warm or cold, idling or under load; does not seem to matter.
This mower has seen a lot of use, but I've taken very good care of it. It is clean and well maintained.
Some people love to hate on these, but it has been nearly flawless for me. The crank case base gasket started leaking a quite a bit, so I changed it. That is really all that I remember. Only ever had E-0 in it.
Has an auto choke with a bi-metallic spring on the muffler and a vacuum diaphragm. I tested both of those, they are working as they should.
At cold start, one pull gets it running and you can watch the choke plate slowly open to full after a few minutes.
Spark plug is clean. Zero oil consumption or smoke.
Only issue is the throttle plate goes back and forth from the governor.
Thoughts on a root cause?