Simplicity GTHL 17 Revving High

Hey guys, I have a Simplicity GTHL 17.

I love this tractor, but for some reason it just wants to rev as hard as it can, I mean, maxes itself out like its trying to take off in flight.

I had a friend who is better than me with mechanics, we all have that friend, and he seems to think that the govenor might be broken internally.

Any thoughts on what could be causing this?

It all started after I took the carb of to clean, and replaced the coil with a dynatek.

Thanks in advance for the help guys.