I just picked up a 165 Hydro, with the Kawasaki (did I spell the right?) 460V engine. The hydro worked driving it down the guys driveway, worked good getting it into the back of my truck, and worked good getting it off my truck this morning. I drove it around a bit, I had to constantly adjust the speed, and it seemed a bit jerky. I found a service / technical manual on line, and after reading, I decided to change the oil in the hydro, and the differential. I also had to epoxy a small hole in the top of the gas tank, and get the "dump valve" for pushing and free wheeling the trans freed up and working. All back together, and filled with fresh oil, I started it up, and NO movement! It freewheels no matter where I have the shifter, but does not move under the power of the trans. I read that you need to have it running, and push it forward and backward to work out any air pockets because of changing the oil, which I did, and still no movement on it's own. Could the dump valve be stuck inside the trans? The pin pops all the out. I used Tractor Supply 90W in the gear case, and 30W engine oil in the hydro, as per the service manual.
Looking for suggestions and ideas, before I decide what I will do with the tractor. Part it out? or find a trans ? I have $75 into the unit, with no mower deck, and no idea what a hydro might cost. It is in great shape, body wise, and the seat is like new.