The best place to start would be at
jdparts.deere.com
They have compete parts diagrams for everything JOHN DEERe.
wiring diagram for john deere 1010
Your local John Deere Dealer can give you a printout
Check with your John Deere dealer. No, not Home Depot or Lowe's but an actual business that works on and sells John Deere mowers.
John Deere website and it's $50 for a CD and $100 for a paper copy
Give up...it's not worth it.
Diagnostics needed for john deere f510 electrical system
Yes. I had to do the same thing with our john deere. We went to the john deere store, and they were very friendly and printed out a diagram for us to take home and use for free. Look in your phone book and find a john deere store near you, or check www.deere.com.
Beer.
At one of my sites; link below:
If the L130 is a John Deere then you can go onto their web site and find it there.
You should be able to go to the website and find your tiller in the parts search area
You can find out if the John Deere 850 will suit your needs by going to the deere website to find its specifications. You can find reviews at www.tractor-review.com/john-deere-850.html.