1800 Series B Diesel
I was driving the tractor on Friday. No load about 1500 rpm. It was running very good. All of a sudden, it cough, gray smoke (not steady) puffs, sputtered, then gray smoke ( smells like unburned wet diesel)...started running rough and black liquid oozing out of #2 cylinder exhaust port.
We spent a fortune on this last fall. Head was cracked we had it repaired. New valves. New injector tips.