Mercury – Mercruiser 44-19513-2 Prop Shaft Genuine OEM Mercury-Mercruiser part. Application: 40 LIGHTNING XR (International) – [0N000513 THRU 0N056164] 40 LIGHTNING (International) – [0N000001 THRU 0N056164] 40 MXL SEAPRO – [0N037781 THRU 0N056164] 40 MXL MARATHON – [0N037781 THRU 0N056164] 50MH – [0N051023 THRU 0N056164] 40 (International) – [0N056165 & Up] 40 LIGHTNING XR (International) – [0N056165 & Up] 40 (International) – [0N056165 & Up] 50MH – [0N056165 & Up] 40 LIGHTNING XR (International) – [0N056165 & Up] 50MH – [0N056165 & Up] .Special Order Item: This product is ordered specifically for your application. To help ensure proper fitment, please confirm compatibility with your engine model using our Parts Finder & Schematics Guide before placing your order. No returns or cancellations once processed.