Yazoo's x3

[beagle5]

I have a small farm here in southern ILL and I now have three older yazoos to mow with. I just bought 2 more last week and having problems with them, one is the Hydrostatic 48 inch and the other is 50 inch with a 20 hp Briggs Model 460777 Type 2277 E-1 . The 20 hp has a starter not wanting to start it and there is some wires disconnected so I am looking for some electrical diagrams. Thanks