Frank,Sorry didn't get back to you earlier. T-ball season is here and I don't get the time I probably need to do everything. Truthfully Riding around for a couple even 5 true engine hours 1/2 to 3/4 throttle should not hurt the engine. BUT - The more you let that baby idle, because of low compression and no heat build up, the more fuel will find its way to the crank case. If your going to ride it around try covering a portion of the radiator. I covered 3/4 of my Radiator on my 730 drove it for over 5 miles to and from and in a parade and the temperature never got over 180 degrees. These tractor's like heat 180-190. Now to the post about the 2 cyl. causing a dyno to buck....My 730 has been on both the Water dyno at the local dealer and MY personal Hydraulic dyno and in neither case did the dyno or the tractor buck. It doesn't mean that it can't happen just that I have never seen it happen. I have run JD 430's, 630's, 730's, and an 830. E-mail me if you need anything. Tony630
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