Marine Water Pump Impeller Kit for PCM & Crusader RP061022 for Jabsco 50461-1001-P - Replaces Sierra 18-8926 - Repair Set for 5.7L 6.0L Serpentine Belt Engines for Nautique Centurion Tige MB Sports

Designed as a premium aftermarket solution, this kit restores proper water pressure and cooling efficiency for PCM & Crusader inboard engines found in premier ski and wakeboard boats. Neglecting a worn impeller can lead to heat soak and severe engine overheating—replace yours seasonally or every 100 hours to ensure uninterrupted time on the water.Reference Part Numbers:Replacement for Jabsco: 50461-1001-P, 50461-1001Replacement for PCM / Crusader: RP061022, R061022Replacement for Sierra: 18-8926Application Guide:This kit is specifically designed for Serpentine Belt Driven Modular Pumps on the following engines:For PCM 5.7L V8: Excalibur 330 / 343 (approx. 2004-Current)For PCM 6.0L V8: ZR6, ZR409, ZR450 (Closed Cooling Systems)For Crusader 8.1L V8: Captain's Choice (496 CID)*Note: Specifically fits Nautique, Centurion, Tige, and MB Sports models equipped with the modular raw water pump.*Kit Contents:1x Neoprene Impeller (10-Blade, Double Flat Drive)1x Main Housing O-Ring (Replaces R047242)4x Mounting Bolt O-Rings (Replaces R047243)*Includes the essential bolt o-rings often missing in standard kits.*Important Tech Note:CHECK YOUR DRIVE TYPE: This impeller features a Double Flat (D-Shape) hub. It is NOT compatible with older pumps that use a Keyed Drive or V-Belt system. Please verify your pump is driven by a serpentine belt before ordering.Note:This is an aftermarket replacement part. All brand names and models mentioned (e.g., for Nautique, for PCM, for Sierra) are for reference purposes only to demonstrate compatibility. Please check your owner's manual to confirm the correct part number before ordering.

• PRECISE FITMENT FOR PCM SERPENTINE PUMPS: Engineered exclusively for PCM and for Crusader Modular Raw Water Pumps (2004-Present) driven by a serpentine belt. Fits 5.7L Excalibur, 6.0L ZR6 ZR409, and 8.1L inboard engines found in for Nautique, for Centurion, for Tige, for Supreme, and for MB Sports towboats. NOT for older V-belt pumps with keyed shafts.
• ULTIMATE DURABILITY & THERMAL STABILITY: Constructed from premium chemical-resistant neoprene composite that withstands high-torque start-ups and continuous operation between 45F to 180F. The hardened brass hub features a precision-machined Double Flat (D-Shape) drive to prevent hub spinning and shear failure under heavy ballast loads typical in wake surfing.
• OPTIMIZED COOLING PERFORMANCE: Restores peak water flow to heat exchangers and transmission coolers, crucial for preventing heat soak in high-performance V8 inboards. The 10-blade geometry is strictly calibrated to OEM dimensions (2-1/4" OD x 2" Width) to ensure instant priming and maximum pressure without risking housing abrasion or cavitation.
• COMPLETE REPAIR KIT WITH BOLT O-RINGS: Unlike standard packs, this service-ready kit solves the "leaky pump" issue by including the essential 3x Bolt O-Rings (R047243) required for PCM modular housing reassembly. Package contains 1x Impeller, 1x Housing O-Ring (R047242), and 3x Bolt Seals for a leak-free installation right out of the box.
• RELIABLE WARRANTY & INSTALLATION SUPPORT: We stand behind our marine cooling parts with a 1-Year Warranty against manufacturing defects. Designed for direct replacement of for Jabsco 50461-1001-P and for Mallory 9-45718. Please lubricate the bore and blades with glycerin or non-petroleum grease during installation to prevent initial dry-run damage.