RPS Water Pump Impeller for Johnson 09-1027B, Volvo Penta 3.0-5.7, OMC Engines

Overview

Meet the RPS Water Pump Impeller, a versatile, new replacement designed for a wide range of marine pumps. Used across brands such as Volvo Penta, OMC, Johnson F5B pumps, Onan, Perkin, Yanmar, Jabsco, and others, this impeller is built to support reliable cooling performance on demanding marine engines. The design focuses on a balanced blade profile and robust materials to help maintain steady water flow under varying RPMs, even in challenging boating conditions.

Key specifications include a width of 1-1/4" (31.5mm), a diameter of 2-1/4" (57mm), and a 5/8" shaft with 12 splines. These dimensions are chosen to fit a broad spectrum of pump housings while preserving strong, consistent engagement with the drive shaft. The kit also includes O-rings and gaskets to fit multiple applications, making it a convenient one-stop replacement option for seasonal maintenance.

For Volvo Penta and OMC applications, please note that this impeller fits pumps with short screws prior to 2005 (see accompanying visuals to confirm fit). When replacing, many common OEM part numbers are covered by this single solution, simplifying sourcing and reducing downtime during maintenance cycles.

How it helps on the water

Replacing a worn impeller can help preserve stable cooling performance, especially during long passages or high engine load. The RPS impeller is designed to engage smoothly with the drive system, supporting predictable water flow and helping to prevent overheating under typical recreational and commercial boating conditions.

• Broad compatibility across major brands and multiple pump models
• Comes with O-rings and gaskets for a complete replacement kit
• Dimensional accuracy: 1-1/4" width, 2-1/4" diameter, 5/8" shaft with 12 splines
• Simple installation tip: apply a small amount of dish soap to ease seating during assembly

What you get and how to use it

• Includes replacement seals and gaskets for a wide range of applications
• Designed to replace several OEM part numbers across Volvo Penta, OMC, Johnson, Sierra, Yanmar, and others
• Instructions and compatibility notes help identify the correct fit for your pump family

Use this impeller as part of a routine maintenance cycle to help maintain cooling performance. While it supports reliable engagement and sealing, outcomes vary with engine condition and operating environment. Consider it a solid option for proactive maintenance rather than a guaranteed performance boost.