Mercury MerCruiser Quicksilver Impeller 89984T4

Mercury MerCruiser / Quicksilver Impeller 89984T4

Maintain proper engine cooling and prevent overheating with the genuine Mercury Marine / Quicksilver 89984T4 Water Pump Impeller. This OEM impeller circulates raw water through the cooling system, ensuring consistent water flow to maintain optimal engine operating temperatures.

Manufactured to Mercury Marines original equipment specifications, the impeller features durable neoprene rubber vanes with a metal hub insert, designed to withstand the demanding conditions of marine cooling systems.

Key Features

• Genuine Mercury / Quicksilver OEM water pump impeller

• Restores proper raw-water cooling flow through the engine

• Flexible neoprene rubber vanes with metal hub for durability

• Helps prevent engine overheating and cooling system failure

• Designed for direct replacement in Mercury and MerCruiser water pumps

Replaces / Cross Reference

• Mercury 47-89984T4

• 47-89984T3

• 47-803631T

• 47-8M0028376

• Sierra 18-3017

• Mallory 9-45306

Compatible Mercury / MerCruiser Engines

Commonly used on a wide range of Mercury outboards and MerCruiser sterndrives, including:

• Mercury / Mariner outboards: approximately 30300 HP (various 2-stroke models)

• MerCruiser sterndrives: MC-I, R, MR, and Alpha One (Gen I) drives

• Certain V6 Mercury outboards and Force engines depending on configuration.

Service Recommendation

Water pump impellers are wear items and should typically be inspected annually and replaced every 100 hours or once per season to maintain reliable cooling performance.

Important Compatibility Note

Impeller fitment can vary by engine model, gearcase type, and serial number range. Always verify compatibility using the engine serial number or existing part number to ensure the correct replacement.