@lee drennen, from my experience, when I've seen you get smoke from the bottom of the loco and not through the smoke stack, it's one of two things:
1) There's an air bubble in the stack, so you blow into the smoke stack, and that usually clears that up.
2) The piston lever is stuck, either from flashing or a worn down spring. Usually it is the spring. Using your photo:
The air chamber is marked "A". This is a separate piece. You'll see how the piston lever pushes against the air chamber, depressing that "plunger" piece it is against. That "plunger" piece should spring back out, unless the spring has worn down.
So pulling upward on the "A" air chamber piece, there is a snap lock on the back... pull that outward, while pulling upward on "A." The air chamber inserts into the smoke unit assembly where I've indicated.
Once you have it removed, you'll need a fine screw driver to work out the plunger piece: There is a spring directly beneath it, so work in a clear area, incase the spring happens to fly out, so you can find it.
Then you want to gently extend the spring.... I usually do it in a couple of places on the spring. Then put it all back together and it should work just fine.
Now it is possible, that you burned out the smoke unit. But like I said, it could just be an air pocket combined with a weak spring. Once you do these things, before you put the smoke unit back into the locomotive, use a transformer with some alligator wires, power it up and move the piston lever back and forth, and see if you now get smoke coming from out of the stack.
If not, it's probably burned out and will need replacing. Jeff Kane (Train Tender) has had them. BUT don't throw the old one out. Put it aside... you may be able to use parts from it in the future.
