Odd smoke problem with my Legacy Berk

I would imagine like most steamers of that size, there should be 2 screws forward, check the cylinders on the underside, and 2 towards the cab.  Sounds like either the stack is not aligned and some of the stack smoke is being forced down or something is blocking the fan from the smoke chamber and the smoke is back back out of the intake.

Either way the shell will most likely need to be removed to correct it.

Maybe someone else will have some more ideas.

Have this loco and had the boiler off. There are screws located in recesses under the steam cylinders, 1 on each side,remove these. The other two are under the cab but they are the second screw (on each side) from the rearmost part of the loco, if you look close you wiill see they go through the "sheet metal" part of the chassis. Some of these were delivered with misaligned stacks, I accidentally misaligned mine after freeing a stuck fan. Stack alignment is finicky on these, after you lift the boiler try tipping the front down a bit while aligning the stack with the smoke unit. You probably don't need to remove the boiler completely just remove the screws and lift it up enough to realign it. * A word of caution*, the front steps of this loco are only attached at the bottom to the pilot, they can be damaged easily.