Starter Mercury Mariner Marine Outboard Engines 40 45 50 ELHPTO ELO ELPTO EO ELHO ELHPTO E EL ELH ELO ELPT EH 50-73521 New Aftermarket Part (Not Rebuilt/Refurbished/Repurposed) 40ELHPTO 40ELO 40ELPTO 40EO 45ELHO 45ELHPTO 45ELO 45ELPTO 50E 50EH 50EL 50ELH 50ELO 50ELPT 50ELPTO 36.1ci 43.9ci 49.8ci 40HP 45HP 50HP OEM(s): Mercury Marine, Johnson Electric Type: PMDD Voltage: 12 Volts Rotation: CCW Teeth/Splines: 10 Teeth/Splines Pinion/Splines OD: 30.8mm / 1.213in Mounting Hole 1: 1/4-20 ID Threaded Approximate Weight: 6.1 lbs / 2.77 kg Notes: 104.5mm Field Case Please verify this is the right part number before ordering