Hi from southwest Florida, great to find some like minded folks. We have an XMark ZTR we use for mowing and a 69' Gravely Convertible 7.6 mower to beat the woods back with. Herein lies the problem. The Gravely has always been reliable for mowing, and for the first time, I tried a small tiller that came with it, a univator?, which worked great for the first hour. Now it won't stay engaged and keeps jumping out of gear while tilling, the tiller stops turning, even when holding back on the rod that engages the attachments. Any ideas? Thanks in advance for any comments.