Today i received the older wankelengine. The engine are unused and can not rotate. Cause the needle bearing in rotor was stucked by gummed oil. I dismantled the engine and lubricated the needle bearing. Moved the rotor around the eccentric shaft some time before the gummed oil was removed. After the engine was cleaned and assembled, compression are good as new.

You can see these picture who are showing inside of the wankel engine. And how to align the rotor at place at backplate with gears at place. How to check the apex seal before use..

Here are the movie of rotor are rotating at backplate with gear inside: http://www.youtube.com/watch?v=eTbg92mRUG4

The ring gear inside in the rotor and the gear centered at backplate are forcing the rotor to rotate and the rotor are transfering the power to eccentric shaft.

The next time are to compare between the older and newer wankelengine