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By certification 
"The main data of left engine is same with right engine in every model engine.
Rotation direction of crankshaft: The left engine resolves right, the right engine resolves right to look from the flywheel side to the free side, to turn right is clockwise.
The left engine resolves left, the right engine resolves left to look from the flywheel side to the free side, to turn left is counter-clockwise.
Starting method: Air motor starting."
Rotation direction of crankshaft: The left engine resolves right, the right engine resolves right to look from the flywheel side to the free side, to turn right is clockwise.
The left engine resolves left, the right engine resolves left to look from the flywheel side to the free side, to turn left is counter-clockwise.
Starting method: Air motor starting."