Mars 40851 Pg-1 Fan Blade Pitch Gauge

Follow these steps to measure propeller rotation and pitch: Step 1: Position the faceplate of the gauge on the blade of the fan. Step 2: Place the foot of the wire body of the Pitch Guage on the center section (spider) of the fan. Step 3: The pointer gives a direct reading of the pitch in degrees, and the clockwise/counterclockwise markings indicate the rotation.