Sounds like air leak or gunk/algae clogging the tank screen. Try blowing back thru the fuel line to push some gunk from the tank screen and then prime the fuel line with a mighty vac. plumbed to a bottle of diesel. Reattach line, prime filters if need be and then try to fire her up.

Better yet after blowing back into the tank install a temporary $30 Faucet/Purlator 12v fuel pump back by the tank. This will prime the fuel line as well as assit with resolving air leak issues. (no suction no air leaks)

__________________
"If anyone knows other lessons I need to learn, please tell me. I'm tired of learning them the hard way".
by JerryBro

The Glow Plug Wait: This waiting period is a moment of silence to pay honor to Rudolph Diesel. The longer you own your diesel the more honor you will give him". by SD Blue

My normal daily life; either SNAFUed- Situation Normal... All Fouled Up, or FUBARed- Fouled Up Beyond All Repair

62 UNIMOG Camper w/617 Turbo, 85 300SD daily driver- both powered by blended UCO fuels