MX6 or MX7 with JD 4720

[Kyle_in_Tex]

I think the problem with the 7 footer is the mass is too far back behind the 3 point.

 

[Kahuna]

I have had both. I had the older style JD 7 foot mower that was built like a tank and really heavy. I had it behind a 65 hp large frame tractor and it was about all it wanted to handle. The mower finally rusted out and the slip clutch was constantly freezing up from 30 years outside so one day (after twisting off the PTO shaft for about the 3rd or 4th time) I just drove the tractor to JD dealership and said I wanted a new mower. They only had the MX6 available although I wanted the MX7.

I took the MX6 and have had no regrets. I would absolutely recommend the MX6, especially on your size tractor. It is lighter in weight and so much more easier to handle. I thought I wanted the mower wider than the tractor but with the 7 footer, I really had to watch close not to hit anything. With the 6 footer I can get right up to something with the back wheel and make a nice close cut.

I would not tax your tractor with extra weight and horsepower drain. It is always good to have a little extra for the tough spots.

 

[michiglenn]

I have the MX6 and that is at the high end of weight I want hanging off the back. I leave the loader on, but there are times the front tires lack good bite. So far I haven't had a problem, but I don't like that light feel in front. I don't know how much more the MX7 weighs, but I would expect that the weight increase plus more length (hence more leverage) would put it into pucker mode too much for me. Horsepower is there even with my 4320, that would not be your concern. My rears are loaded, but that probably would'nt affect anything.