I bought a John Deere GX 1320 (I think it is a mid 90's) 48" walk behind (also known as a "yellow deck") ... It did not run. I got it running, but I do not understand the controls. With the engine running and the shifter in 1st gear, it takes off as soon as you pull down the dead man lever. The brake handles on each side have no effect until they are FULLY depressed at which time the corresponding wheel "locks up" The ONLY way to stop it is to release the dead man lever. It must have a transmission problem. It looks like it has a trans axle as opposed to a hydo. Since I have never used a machine like this, I have no idea what to expect. I have a shop manual but I can not find a free operators manual on line.
On another note...I really want to put electric start on the 14 HP Kawasaki. Has anyone done this?