You have the Exmark Pioneer 60 your looking at somewhere around 950lbs I believe but you have to remember your only lifting about a third of that. My Cub Cadet comes in at 722 lbs and I use the Mojack EZ and it does a great job. I also use it on the GS at 756lbs no problem and that's a front engine.. Biggest thing is the width of your front wheels, what ever you buy make sure The jack will open to the width of the mower. The Mojack EZ wheel span measurement: 35.5" - 47.5" outside front wheel. The Mojack XT wheel span measurement: 31.5" - 62.5" outside front wheel.