</font><font color="blue" class="small">( Everyone knows most tractors blow a little smoke from the stack....No gagging from the foul smell of half burned fuel )</font>
Hmm... havn't seen this on any of my ford/NH diesels... ( Nh 97' 1920, 02' NH 7610s, and 75' 5000. Start up without any black smoke, and run without black smoke. I don't lugg my engines down.. so don't even get to see that momentary puff where the governor is pumping up the rpms.. etc.
On our fleet of off road and on road diesels, at work.. when we see a diesel smoke while running.. it almost always turns out to be a clogged air filter and / or bad fuel/filter.. or is slap worn out. I've also seen smoke on the hard starters ( wore out units ), or on the ones using a starting aid in colder weather.. etc.
Soundguy