I don’t know anything about this particular diesel engine but can hazard some guesses.
It’s probably old and tired and not making compression like it used to; diesels fire by compression ignition. That engine is turning freely, otherwise it wouldn’t be pumping any air.
Old diesels without glow plugs need to work up some heat in the heads to get combustion going.
All that white smoke is unburned diesel, just aerated fuel getting pumped through the cylinders. The starter (compressed air or electric) is probably doing a lot of work here to generate heat in the cylinders via compression. If it’s supercharged it may be struggling to build boost in the intake side. Later the dark black puffs is partially burned fuel… it’s starting to fire off. The exhaust smoke seems to be shifting from white to gray. I’ll bet a dollar once she gets running that exhaust will clear right up.
I don’t know anything about this particular diesel engine but can hazard some guesses.
It’s probably old and tired and not making compression like it used to; diesels fire by compression ignition. That engine is turning freely, otherwise it wouldn’t be pumping any air.
Old diesels without glow plugs need to work up some heat in the heads to get combustion going.
All that white smoke is unburned diesel, just aerated fuel getting pumped through the cylinders. The starter (compressed air or electric) is probably doing a lot of work here to generate heat in the cylinders via compression. If it’s supercharged it may be struggling to build boost in the intake side. Later the dark black puffs is partially burned fuel… it’s starting to fire off. The exhaust smoke seems to be shifting from white to gray. I’ll bet a dollar once she gets running that exhaust will clear right up.