Distributor Cap Prestolite V6 Screw Down | Sierra 18-5353 Prestolite V6 Screw Down Distributor Cap | Sierra 18-5353 Distributor cap for V6 Prestolite distributors using two screws to attach cap to distributor housing. Replaces Crusader 41069 Replaces OMC 984398 Replaces Volvo Penta 841926 Replaces Mercury Marine, Mercruiser 392-9086 and 392-9086T