Johnson Evinrude Electronic Shift Assist Delco Distributor WSM 123-7878, CDI Electronics ESA for Delco Distributor with Tachometer Output and Two Connectors. Please check OEM#"s below for correct application of the item. Replaces OEM# 986610, 987396, 987878 At Pwc Engine,com we offer top name brands including WSM, Pro-X, Wiseco pistons, OEM RIK Japan rings, Nachi, Koyo, & KBC Engine bearings. PWC Engine use the highest quality gaskets and seals in the industry such as Athena USA, factory used ARS precision quality seals when available and much much more! If you are looking for performance parts, we offer the best distinguished brands and hand pick the parts that we know work and use daily.