Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

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You should have only 1 ring. It was my doing that got Jin to start producing these engines with 1 ring instead of 2.

All these engines in the beginning were shipped with 2 rings. I have removed the extra ring on all that came through the Office of Steam. I always used the top groove to leave the single ring in. Some like the bottom groove. I am not certain it matters which you use as long as it is just 1 of them. The bore is so smooth that with 2 rings it is impossible to get oil between the 2 of then leaving the inside half of each ring to dry out and cause wear, friction, squeaking, and engine dying.

As long as you use white gas which is Coleman fuel or Naphtha mixed 15 to 1 with Marvel Mystery Oil or 2 cycle oil, you will not have a single ring failure for many hours. I have run these all day at shows and have yet to see my first single ring failure.

Gil