Flyer5 wrote:That's the air fuel ratio getting too lean.
Well, I had outfire last night with plenty of coal! Ashpan was full to the brim with at least 40 lbs. of coal. First time that's happened. Guess I've got to bump the idle feed rate up a bit in the 80° and up temps. May even need a draft inducer. There's been .005" of draft, tops. Not sure I want to get into that - would be easier & cheaper to just let the oil burner run for the next 4 months.
Just vacuumed about 3 lbs. of flyash and fines out from under the burn plate! Sucker was packed! Was wondering how it was running without my strips of paper restricting airflow - usually without the strips, I'll get CO out of the hopper. Blew out the fan, oiled the bearings and buttoned it back up. Now to poke thru the holes from the top (should've done that first .. ), clean my connector pipe, and relight - we'll see what happens.