Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Sounds like you have an internal clutch issue. You would need to replace the clutch to fix the issue. I just had a JD with Kohler engine with this same issue. Replaced clutch and problem has not resurfaced since. It could be a loose wire from PTO to the clutch (check that ground is grounded good), but mine was a new PTO Clutch to fix issue. Let mek no if you need anything else please. I am here to help.