Thanks for your quick reply grumpy.

Have heard the Rover 910 196cc may be a clone, but then don't know of a 196cc Honda.

I had heard those comments on Kohler as well but have heard recently things are much improved. Rang around a bit for parts and so far seem reasonable. I hope the one I'm interested in has a true throttle, but I guess a governor control is something to keep revs down on start up, shutdown and when emptying the catcher. The Rover 910 has neither.
I agree, in most mowing applications, should be WOT.

The larger sized Kohler Courage's did start off with a bad rep.

Still keen to hear of others comments on the Kohler XT8. Would be like to know if it is a Honda clone, it is 173cc.

Thanks.