Sierra 18-5385 Distributor Cap - Delco 4 Cyl Ignitions Sierra distributor caps are designed to meet OEM specifications. For GM 4 cyl marine engines using a Delco conventional ignition distributor. For use on Mercruiser and OMC Stern Drives. Interchangeable with Chris-Craft 16.69-00052 GLM 71540 JohnsonEvinrude Outboard 380541 Mallory 9-29401 Mercruiser Stern Drive 393-9459Q1 393-9459 393-9549T 33667 FI6900052 OMC Stern Drive 380541 California Residents WARNING Cancer and Reproductive Harm - P65W