Carlson furnace question??

I just picked up a 1958 trailer that has a Carlson furnace in it. It is a model 1080 gravity furnace.
It was pretty coroded. I removed it and cleaned it out piece by piece. The problem is I still can get it to fire up.
Can anybody help???????
It was pretty coroded. I removed it and cleaned it out piece by piece. The problem is I still can get it to fire up.
Can anybody help???????
