The draft tube on my 235 was loose and kept sliding out, as well. Here's how I fixed it. I took a large ball peen hammer that had a ball diameter slightly larger than the throat of the tube that slides into the block. Then i gave it one or two whacks, but be careful...too many whacks and you will never get it back in the hole. Mine took two and it snugged it right up. Kind of a poor mans pipe expander but it worked! Good luck!
Coffeeman
