I have been away from diesel for a little bit and today I wanted to do a test run to get back up to speed on diesel operation before I got to the field. So, mounted my OS 40 FP with DD head in the test stand, fueled up, primed once in the venturi and started flipping. Well as I remembered this engine it was always very easy to start, would give me fits in the air but starting it was the best. NOT today, I flipped, closed in the compression 1/8 turn at a time, this went on for half and hour. Then I decided maybe I should use the starter. Well it didn't help. I then primed again in the venturi and still nothing, thinking there was nothing to lose I put a few drops in the exhaust muffler and then blew into it. Flip, flip - 1/8 turn in on compression (at this point I'm way in on compression) disconnect the fuel line, blow into the exhaust flip again then it fires and burns off the prime, flip again it burns off somemore prime, reconnect the fuel line - flip, flip nothing, prime venturi - flip ...... flip nothing. Small prime into exhaust, flip, fires, seem needle is to lean and misses and stops. After that I got nothing. Looking back it seems they like the "WET" exhaust prime and not much in the venturi, starter wasn't much use.

What did I miss?