Screw 530016406

1. Watched several YouTube videos on fixing this problem and started by partially removing the blower case.
2. I replaced the carburetor and checked the spark (good) - still not starting
3. I removed the muffler to check for spark screen blockage, carbon buildup between engine and muffler, and to inspect the piston/ring. I tried starting it in this condition - still not starting
4. I finally decided that the piston ring might be stuck. I removed the cylinder and the crankcase cover, pulled the piston and rod off the crank shaft, and verified the ring was stuck in the grove with carbon.
5. I tried to free the ring with a utility knife cutting around the ring/grove but I broke the ring when trying to pry it out. Should have spent more time trying to free it.
6. I ordered a replacement ring and spare (in case I broke the first one installing it) and some case screws which missing from ereplacementparts.com.
7. After the parts arrived I sprayed the piston with lubricant and slid the new ring into place. I then sprayed the inside of the cylinder and rod's crank bearing with lubricant and reassembled the engine.
8. I reinstalled the blower's case, added fuel, and got it to start.
Success! This was my first time doing repair work on a small engine and ereplacementparts.com had what I needed and the order turn around time/price was good.