Mercury/Mariner Voltage Regulator 6 Cylinder 200 Hp Model Xri 40 Amp 1989-1991 Serial# 0C100861-0G303045 WSM 194-1873 PLEASE NOTE: Order 194-1873 if Stator has 2 Yellow Wires. Please check OEM#"s below for correct application of the item. Replaces OEM# 18736A, 18736A 3, 18736A 8, 18736A11, 18736A14, 18736A15, 18736A20, 18736A21 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.