Mercury – Quicksilver Water Pump Impeller | Cooling System Component | Marine-Grade Rubber | 161542

Overview

A good cooling system keeps your outboard running strong, season after season. The Mercury Marine 161542 Quicksilver Water Pump Impeller is built to deliver reliable water flow and protect your engine from overheating. Designed for Mercury and Mariner 40–50 horsepower TwoStroke outboards, this impeller moves water efficiently through the cooling passages to maintain consistent engine temperature. It’s tough, flexible, and built to handle the kind of real-world use that comes with long days on the water.

Key Features

• Purpose: Circulates water through the cooling system to regulate engine temperature.
• Material: Constructed from high-strength, flexible marine-grade rubber for durability and steady performance.
• Design Detail: Engineered for high flow rates and improved cooling protection.
• Compatibility: Fits Mercury and Mariner 40–50HP TwoStroke outboards.
• Performance: Ensures efficient cooling and extends the life of your engine.
• Service Tip: Impeller only — additional gaskets, seals, or housing parts sold separately. Always replace seals and gaskets during service.

Engine & Boat Compatibility

• Mercury and Mariner TwoStroke outboards in the 40–50HP range.
• Commonly found on fishing boats, pontoons, runabouts, and small workboats.
• Designed for reliable use in both freshwater and saltwater environments.
• Always refer to your owner’s or service manual to confirm fitment and service intervals.

Performance & Practical Benefits

A healthy water pump impeller is the heart of your engine’s cooling system. The 161542 impeller delivers steady water flow, even at idle, keeping your outboard cool and protected. The rubber vanes are flexible enough to maintain pressure and strong enough to resist damage from heat or debris.

Replacing the impeller regularly prevents overheating, prolongs engine life, and keeps your performance consistent. With the Quicksilver 161542, you get an impeller that’s designed specifically for Mercury’s cooling system — one that fits perfectly, performs smoothly, and keeps you running safely on every trip.

Why Buy OEM

Not all impellers are created equal. Off-brand versions can wear quickly or fail to move enough water under load. The Quicksilver 161542 is a genuine Mercury Marine part, molded to exact factory tolerances. It’s tested for flow, flexibility, and heat resistance — everything a marine engine needs for dependable cooling.

Using Mercury’s OEM impeller means no guessing, no trimming, and no fitment issues. It’s made for your outboard, ensuring that every degree of temperature stays right where it belongs. This is one of those simple maintenance steps that can make or break your season — and with the right part, you only have to do it once.

FAQ

Q1: Which engines use this impeller?
It fits Mercury and Mariner 40–50HP TwoStroke outboards.

Q2: What makes this impeller better than aftermarket versions?
It’s built to Mercury’s OEM specs, using marine-grade rubber designed for superior durability and consistent water flow.

Q3: Do I need other parts to complete the replacement?
Yes — seals, gaskets, and other pump components should be replaced at the same time to ensure proper sealing and pressure.

Q4: Can it handle saltwater use?
Absolutely. It’s designed to resist salt, corrosion, and heat in both salt and freshwater conditions.

Q5: Is it easy to install?
Yes — it’s a direct-fit replacement. Follow your owner’s manual for proper disassembly, installation, and torque specs.