When the plug wire on my Q52 ingition module broke, I replaced the whole module with one off of a 25cc Homelite weed-wacker. It fits and works perfectly. I lost a $50 smoke muffler off the same engine and hit up the old weedie again. Took the guts out of the 25cc muffler, the bolt holes lined up nicely, brazed some pipes and smoke coil to it, and voila! It's not as pretty and is a little loud but works great.