Hello. Always reliable starting L2800 (first turn). Replaced old battery in the fall. After that, it would not start right off but on second or third turn. Then it would run a bit rough then warm up. After that it was harder and harder to start and now won't start. It did rumble as if it would start but would not, or if it did, immediately die. Now it won't even do that. Seemed like a fuel issue/lack of fire to me so cleaned Fuel filter, made sure flexible lines were clear, bled lines. No change. Started reading threads here at Orange Tractor Talks. Replaced glow plug relay, key switch. Starter turns, no catch. Cleaned all electrical contacts i could find and the fuses/fuse block. Checked each electrical component with fuse in/out. All worked when in, not otherwise. If i turn the key in one motion past the first stop the engine will fire, blow some black smoke, immediately die. Does this ring any bells for anyone as to what might be the issue? Seems it should be something I can figure out versus having to get it on a trailer somehow and get it to a shop. Any ideas? Thank you very much.