OEM Quiksilver distributor assembly part #: 805185A36.  Purchased new and was installed this season.  Only about 1 hour use before new aftermarket ignition systems were installed in the boat.  Included are the distributor, ignition sensor, cap, and rotor.  Was purchased for a Mercruiser Thunderbolt IV ignition system on Mercruiser 350 5.7L V8 motor.  Will work with Thunderbolt V systems as well.