Had a close call this morning. Was chisel plowing with one of the MF2745's. Smelled something similar to a smoking V-belt, then looked down through the cab window, and smoke billowing from the exhaust crossover next to the cab. Shut her down, jumped out, and I had FIRE at the back of the engine. This is where the safety warning comes in..........BE SURE TO HAVE A FIRE EXTINGUISHER ON BOARD! Bad thing is, I did NOT have an extinguisher. Some fast work with fresh chiseled dirt & I got the fire put out. There was some old accumulated oil back there, but that wasn't what caused the fire. BIRDS! They keep building nests & I keep tearing them out. I had checked it yesterday, and it appeared clear. But once I got it back to the parlor for a good cleaning, I found that bits of birds nest material had dropped down below the crossover manifold to where I couldn't see it. Well, it's ALL out now, and I had to splice new wiring in where they got melted. Been back to the field since & all is well. Would have finished, but behind a bit. Will finish chiseling after lunch. Oh, and there IS now a fire extinguisher on board, and I will be buying a few more as well.