Diesel tractor won't start? (water in fuel) 

I was having issues with this tractor occasionally starting and running rough or not starting at all. I fixed it by emptying the water from the water separator. You may need to do this multiple times to remove all of the water. Extra measures to fix this issue can be removing the fuel tank and cleaning it out so that there is no water in it. Also, make sure that no water gets in to the fuel tank because of a leaky fuel cap or water in a Jerry can.