NEW STARTER MOTOR FITS 1984-91 FORCE ENGINE 507 50HP 50-803903T 18-6439 STR-1061 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: Counterclockwise Teeth On Drive / Splines: 11 Source: Aftermarket