I'm sure this is because there is difference whether you are standing in front of the engine or sitting in the cockpit. If C&H referenced a direction guess what the next question would be. Leaving it out makes sense because 99.99% of people wouldjust turn it the direction of rotation when the engine is running.

RcXel's clockwise direction may sound odd to many but makes senseto those ofus who work on these things in our sleep. Rotation direction, right, left, up, down,are always referenced from the pilots seat.

Always time the engine while rotating it in the directionyou want theenginetorun.