StayCoolPumps Impeller Kit SCP-RP061022 — Neoprene 10-Blade Replacement for PCM/Crusader Serpentine Pumps

The StayCoolPumps SCP-RP061022 is a complete neoprene impeller service kit designed to restore water-pump flow on many PCM/Crusader/ Pleasurecraft engines that use serpentine-driven pumps.

This aftermarket impeller kit includes the impeller, a mounting O-ring, and three screw O-rings, sized to match the original RP061022/Sierra 18-8926 replacements. The impeller’s 10-blade neoprene design and double-flat 5/8" shaft drive align with the pump housings used on a range of newer PCM engines and their marine applications. It’s engineered for direct-fit replacement in compatible pumps, making it a practical choice when performing routine cooling-system service or post-run inspections.

Which engines and pump housings will this kit fit?

The SCP-RP061022 kit is intended for PCM and Crusader Pleasurecraft models that use serpentine-belt-driven water pumps. It commonly fits 5.0L Pro Sport and GM 5.0L, 5.7L and 6.0L applications as well as several model-specific pump housings listed by OEM part numbers.

• Compatible models: Excalibur 330, EX343, ZR6, ZR409 and similar PCM-based engines.
• Fits pump housings: RA057032 (6.0L), RA057034 (5.7L), RA057035 (8.1L), RA134071 bearing housing assembly.
• Replaces OEM references: R061022, RP061022, Sierra 18-8926, Mallory 9-45718.
• Not compatible with V-belt driven pumps; for serpentine systems only.

How does this impeller restore cooling performance?

The impeller’s 10-blade silhouette and flexible neoprene material create positive displacement flow through the raw-water circuit when rotated by the pump shaft. Replacing a worn or damaged impeller prevents cavitation, restores proper flow rate and helps maintain engine operating temperatures within intended ranges.

• 10-blade neoprene design resists cracking and provides consistent pump output.
• Double-flat 5/8" shaft drive ensures secure engagement with the pump drive.
• Included mounting O-ring and screw O-rings seal the housing to prevent leaks.
• Direct-fit dimensions: 2" width, 2-1/4" diameter — matches OEM geometry.

What should I check during installation?

When installing the SCP-RP061022 kit, inspect the pump housing, rotor bore and shaft for scoring, corrosion or debris. Proper seating of the impeller and fresh O-rings are crucial to avoid leaks and ensure the impeller draws water effectively on first run.

• Clean the pump cavity and check for damaged vanes or foreign material.
• Verify the shaft is straight and the double-flat drive mates snugly.
• Replace all O-rings included to restore housing seals and prevent air ingress.
• Prime the pump or follow engine maker’s start-up procedure to prevent dry running.

Why choose this aftermarket kit over an OEM part?

The StayCoolPumps kit provides the essential components for a complete service at a competitive price, matched to the same fit and function as the listed OEM references. It’s made to meet common marine service expectations while including the extra screw O-rings often omitted in single-part replacements.

• Cost-effective alternative to buying separate OEM pieces.
• Includes impeller plus all necessary O-rings for one full service.
• Manufactured to match OEM dimensions and mounting interfaces.
• Helpful for planned maintenance or emergency replacement at the dock.

Who is this for: This impeller service kit is aimed at boat owners, marine mechanics and fleet technicians who maintain PCM/Crusader/ Pleasurecraft engines with serpentine-belt-driven water pumps. If you perform regular cooling-system maintenance or need a direct-fit replacement for RP061022/Sierra 18-8926 style pumps, the SCP-RP061022 kit supplies the impeller and seals required to complete a reliable service.