BRAND NEW HIGH TORQUE GEAR REDUCTION STARTER FITS 1987-1989 MERCURY 165 180 3.7L 10059SP ST59 100% NEW and Made with the Highest Quality Components Available Full One Year Warranty Computer tested for consistent Quality and unsurpassed reliability Starter - Voltage: 12V Rotation: Clockwise Teeth On Drive / Splines: 9 Source: Aftermarket