Water Pump Impeller Replacement for Marine AQ BB MB MD Engines – Fits Part Numbers 831182 835182 875573 875575 831178 855517 855578

This water pump impeller is a replacement part designed for use in marine engine cooling systems compatible with AQ BB MB MD engine series. It replaces part numbers 831182, 835182, 875573, 875575, 831178, 855517, and 855578. The impeller features a key drive design with 12 vanes, a diameter of 57mm (2-1/4 inch), width of 31.5mm (1-1/4 inch), and a shaft diameter of 15.8mm (5/8 inch). It is constructed from neoprene with a brass insert, intended for reliable performance in standard marine water pump applications.Fits water pump models 855517, 855578, and 831178. Compatible with a range of marine engines including 230A, 230B, 250A, 250B, MB20A–C, MD21A–B, AQ115A–D, AQ120B, AQ125A–B, AQ130–D, AQ131A–D, AQ140A, AQ145A–B, AQ151A–C, AQ165A, AQ170A–C, AQ171A/C, AQD21A–B, BB115A–C, BB140A, BB145A, BB165A, and BB170A–C.Package includes one impeller. Please refer to the product specifications before ordering for proper compatibility.Compatibility Disclaimer: This is an aftermarket replacement part. Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.

• Compatible with AQ BB MB MD series marine engines including models 230A 230B 250A 250B MB20A MB20B MD21A AQ115A AQ130B BB140A and more
• Direct replacement for numbers 831182 835182 875573 875575 831178 855517 and 855578
• Designed to support consistent coolant flow for engine temperature regulation in marine cooling systems
• Constructed with neoprene material and brass insert for durability under continuous operation
• Key drive impeller with 12 vanes 57mm diameter and 15.8mm shaft size for specified pump housings