Fits Mercury & Mariner O/B 1996-UpFITS:135,150XRG Magnum III,175, 200, 225, 250 H.P. 105-140 H.P. JetRplc. Merc # 828708, 878265A1,A4& 8M0031551O-Ring IncludedArco# 6250OE# 828708 Sierra# 18-6773 Replaces PT486NM-OE