I finished my first Sub compact tractor. I took an old Bolens 1666 With no engine, electrical, gas tank, wiring, etc. Then I found a 1940 Leroy D 71 four-cylinder air cooled gas engine. The motor came with the big gas tank you see now on the tractor. It took some work but I got it all finished up. The PTO works as well. I will add a charging system for the battery later. I mounted the engine in facing the direction it is now, Then mounted it the other way only to find out I had it mounted right first time. So in short I've install this engine three different times. The hydrostatic transmission only operate one direction. I raised the front in 3 inches then built a body lift it to compensate for that difference. It has a stainless steel fuel valve and lined it run all the way to the fuel pump. The mufflers Is a Yamaha off a quad. Rather than use the old oil bath air cleaner system I built my own and it works as a crankcase ventilation unit as well. I built the idler assembly from Parts from a satellite dish, scooter wheel, telephoto lens and an office chair. I have to pull start It with the rope it starts up first pull every time. The Seat is off of mobility Scooter and it is very comfortable to sit in with great back support. I put larger Goodyear front tires on it and rebuilt the steering mechanisms. It turns just fine. I will be building a Hood for it since I had extend the Frame 6 inches. I took it out and Rototiller yesterday. It worked really well, no shortage of power. Well for Some of you Fellers You might not like this much because it is not a conventional unit , I did the best I could and had some fun with it to. I'm still trying to figure out use these forms I hope I placed this in the right area.