580k stopped and won't start

Hi all,
Firstly thanks to all the amazing people on this forum with so much knowledge they offer up!

I've just run out of light for today, and the backhoe is about a kilometer from the house, so I'll do more testing tomorrow.

I started it up fine used a little ether as per usual in the cold weather, it was going fine just driving over to the hayshed to pick a bale off the top. It made it most of the way there running fine, and then it just completely cut out. Now it will not start or...

580k stopped and won't start

580k stopped and won't start