Thanks w8, I don't think it's ringed either in spite of what the Enya literature that came with the engine said. I don't wish to tear it down. If it ain't broke don't fix it. I have gazed into the exhaust port and could see no ring.

How in the world did you obtain such a wealth of knowledge about such a variety of model engines? Do you own one of every engine ever built? You are an encyclopedia!!!!

Regards,
Bill