I have a self-propelled walk-behind Craftsman that's a few years old. Normally, I just mulch mow so I don't have to deal with the catcher bag, but every spring I scalp my bermuda and bag the clippings. Trouble is, whenever I put the catcher bag on and start mowing, the clippings blow out through the crack between the bag and the plastic flap and I become covered with grass clippings.

My makeshift solution has been to put a cloth rag in the crack to fill it up, but that's getting old.

Any suggestions? Do the catcher bags normally warp? Should I try pounding the metal with a hammer?

Maybe I should just go buy some adhesive rubbery stuff and stick it on to seal the gap.

What do you think?