Can you swap an engine from a cheap garden tractor to a used ZTR? Will a smaller engine still work for the hydraulic demand? Not looking for speed, however there are many 20+ HP motors out there. I'm thinking of junking the 3 mowers, and save the engines. I have 3 MTD type mowers 38", 42", 46". The latest 46" Yardman used 3 drive belts a season. All require repair, but the most aggravating thing is constant belt replacement. The blade curved tips also break off twice a year. On this forum, I hear that ZTR's are durable, little maintenence on deck. The garden tractors are a vertical mount. There are plenty of good low hour engines out there. Do they have a standard bolt pattern for interchanging engines on ZTR's like Exmark?