If you have not messed around with the timing, and are running ordinary diesel, the timing should be ok.
It takes 2 revolutions for 1 compression event.
Someone mentioned cold start pre-fuel cups or injectors - maybe they will clarify how that works.
And at some point ( 40F, 32F), the engine specs will state you need cold start assist = glow plugs, air preheat but NOT ether spray or starting spray fluid