Im sorry folks
The model is 4456771188B1 / 445677 it is twin cylinder ohv. 2009/march
When it starts up throttle works fine low to high speed. When warmed up after cutting 15 mins the engine revs like it is on nitro, that is when I pull throttle to slow position and it hardly drops RPMs or powr...
OK as far as adjustments I have never touched anything other them basic tune ups over the yrs. It is a hard start and choke does work properly, I am going to adjust the valves tomorrow >.04-.06 . Thank You
Yes sorry the model is 4456 77 1188 B1
I have worked on engines all my 63 yrs and never saw one do this.
Is it something I can do with tech and dwell meter ( that is a old tool ) LOL
I need to find why my tractor 2008 yt4000 Craftsman is gaining very strong power after using it for a few mins on normal setting. as if it had a turbo charger on it.
I am not able to reduce throttle speed back to a low idle it remains high.
Any thoughts, very weird , it runs great but sounds as...