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Engine Rotation Terminology


Engine rotation direction is determined by observing Flywheel rotation from the flywheel end of the engine looking forward to the pulley end of the engine.

clockwise flywheel rotation

Normal (Standard)
Rotation: Counter-clockwise (left hand)
flywheel rotation

counter-clockwise flywheel rotation

Reverse (Opposite)
Rotation: Clockwise (right hand)
flywheel rotation

Note: Propeller rotation is not necessarily the same as engine rotation. Do not rely on propeller rotation in determining engine rotation.
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