I agree Richard. The days of 'eye-balling the flame' and arbitrarily adjusting the air are over. You would be well advised to find a burner tech you can trust, and probably the nozzle will be smaller that the specs, and the pump pressure may have been modified for efficiency. Please do this very soon, because you are wasting fuel as long as it is 'huffing along'.
....and to defend you, it is a very good idea to have another form of heat maker whether you burn coal or not. It is like a spare tire for your vehicle. I KNOW you miss the Van Wert, and it is probably lonely stored away after being such a loyal friend for so long, but warmer weather is coming, so please call the tech to make your sleeping much easier.
PS: Not a big Carlin fan, but they do make some nice stuff now. Copied Riello enough, and they are now on the right track.
You sure need to clean that boiler as well......