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

Thanks for the suggestion Raphael. Spark at TDC sounds right.

Also, after making the post here I received the following pics from Jin showing the proper timing gear orientation. I was surprised to see there are no timing marks. I think a couple of additional o-rings on the crankshaft would prevent the gear from slipping out of place during shipping.

All the best,

Darryl