Me neither , but next time I talk to Joe Guidry I will ask him about it...... I am sure he went or will go to a freshen up course for them.... He has the Scag dealership not far from me.....
I did look it up and looks like beast........ 3 valves per cyl. Here is the link to that monster..
For sure a beast but it chatters a lot after some hours is put on. I don't like the way they made the valves arm stem just to be put in by a pin it Moves a lot and I think that is where the noise comes from.