I ended up just fabricating a tool to make it work. A 16" pice of thick steel plate about 4 inches tall. Drilled a big hole about 3" from one end to allow the socket to fit and then two outside holes to put long bolts into the flywheel (I removed two of the flywheel allen bolts). This allows the tool to jam against the frame of the cart and I was able to remove the nut easily with no damage.