Camray 3 boiler?

Ran out of oil which caused lockout light to come on and camray 3 boiler would not fire up.We filled up with oil and cleared the air lock following information from this website. lots of air bubbles and oil came out spurting everywhere waited for a steady flow then fired up and then tightened up brass hex nut. Boiler now working but smoke coming from pump/fan turned everything off smoked for a few mins then stopped. Is it safe to try starting up again?