Quicksilver Impeller

Quicksilver Marine Water Pump Impeller – Premium Lower Unit Cooling Component
Restore your engine’s cooling capacity and protect your powerhead from heat damage with a Quicksilver Marine Water Pump Impeller. As the heart of your outboard’s cooling system, the impeller is responsible for drawing water in through the lower unit and circulating it throughout the engine block. Quicksilver impellers are engineered to meet or exceed original equipment manufacturer specifications, providing a reliable and cost-effective solution for maintaining peak performance on Mercury, Mariner, and various other outboard brands.
Quicksilver impellers are constructed from a specialized, high-quality elastomeric rubber compound that is designed to remain flexible even in extreme temperatures and high-pressure environments. This flexibility is critical for the impeller vanes to maintain a constant seal against the pump housing, creating the vacuum necessary to move high volumes of water. Unlike budget aftermarket impellers that can become brittle or lose their shape over time, Quicksilver components are formulated to resist the corrosive effects of saltwater, silt, and chemicals often found in the marine environment.
This impeller is designed for a precise fit, ensuring that the center hub and vane dimensions match your specific pump housing perfectly. A properly fitted Quicksilver impeller eliminates the "bypass" leaks that cause low water pressure at idle or overheating during high-speed runs. Because Quicksilver is a trusted brand under Mercury Marine, these impellers undergo rigorous testing to ensure they can withstand the constant friction and RPMs of a high-performance marine engine without shedding blades or failing prematurely.
Water pump impellers are considered "wear items" and should be replaced during your annual service or every 100 hours of operation. Over time, the rubber vanes can take a "set" (bending permanently) or develop small cracks from dry-rotting, especially if the boat sits for long periods. If you notice a weak tell-tale stream, fluctuating water pressure, or an overheating alarm, the impeller is the first part that should be inspected and replaced. Running an engine with a failing impeller can lead to melted exhaust components or catastrophic engine seizure.
When installing your new Quicksilver impeller, it is important to clean the pump housing and wear plate of any old debris or salt deposits. We recommend applying a light coating of marine-grade lubricant or dish soap to the impeller vanes to help them slide into the housing and prevent a "dry start" before water reaches the pump. Ensure the impeller key is properly seated in the shaft keyway to prevent the impeller from spinning freely on the shaft. Using Quicksilver ensures that your cooling system is backed by decades of marine engineering expertise.
Key Search Terms: Quicksilver Impeller, Mercury Outboard Water Pump, Marine Cooling System Repair, Quicksilver 47-89984T4, Outboard Impeller Replacement, Mercury Mariner Pump Part, Boat Engine Cooling, Quicksilver Marine Parts.