Most PTO Shafts have to be cut shorter, Read the directions that came with the tiller, they will tell you how to measure and cut.
I wonder where the missing part of the snap ring is?A short story why the driveshaft needs to be cut to correct length. A friend has a Tartar tiller from TSC. He did not cut his driveshaft short enough. The only thing that keeps the input shaft/gear of the gearbox from moving inward is a snap ring. When he replaced a leaking seal he found only part of the broken snap ring. I don't think his tractor was damaged.
Having to long a PTO shaft can cause sever damage to the rear of the tractor, he was extremely lucky!A short story why the driveshaft needs to be cut to correct length. A friend has a Tartar tiller from TSC. He did not cut his driveshaft short enough. The only thing that keeps the input shaft/gear of the gearbox from moving inward is a snap ring. When he replaced a leaking seal he found only part of the broken snap ring. I don't think his tractor was damaged.