Mercury – Quicksilver Water Pressure Sensor | Engine Monitoring | Marine-Grade Construction | 881879T11

Overview

Any boater who’s spent real time on the water knows the comfort that comes from glancing at your gauges and seeing everything right where it should be. That quiet steadiness — the engine breathing easy, temperatures holding, pressure sitting in that sweet spot — makes every trip feel a little more relaxed. This Mercury Marine part plays a bigger role in that peace of mind than most people realize. A dependable water pressure sensor keeps you connected to what’s happening inside your engine long before you’d ever feel a hiccup at the helm.

It’s one of those parts you may not think about often, but you feel its absence immediately when it starts to fail. With the right sensor in place, you get that smooth, confident sense that your engine is cooling the way it should, whether you’re running across open water or creeping through a narrow inlet.

Key Features

• Replacement water pressure sensor designed for accurate cooling-system monitoring
• Marine-grade construction built to withstand heat, moisture, and engine vibration
• Compatible with pressure ranges from zero to one hundred pounds per square inch
• Features a compact, sealed design for secure, protected installation
• Installs easily using common hand tools

Engine & Boat Compatibility

• Fits Mercury and Mariner outboards from seventy-five to three hundred horsepower in both FourStroke and two-stroke configurations
• Works with DFI, Jet, Pro XS, and Sport XS engines
• Suitable for MerCruiser sterndrives and inboard V6 and V8 multi-port fuel injection engines, including models using three hundred five, three hundred fifty, three hundred seventy-seven, four hundred ninety-six, and five hundred two cubic inch displacement
• Common on center consoles, pontoons, freshwater fishing rigs, cruisers, and jet-powered craft

Performance & Practical Benefits

This sensor brings clarity to what’s happening deep inside your cooling system. A good water pressure reading can warn you of blockages, weak pumps, or intake issues before they ever turn into real trouble. Once installed, the sensor gives steady, predictable readings — no flickering, no mysterious drops, just reliable feedback you can trust.

You’ll notice how cleanly it ties into your existing harness and how securely it locks into place. The sealed body resists corrosion and holds up to constant heat cycles, while the internal design delivers smooth, accurate pressure signals back to your gauges or engine control system. The result is simple: your boat feels more predictable, and you feel more in control.

Whether you’re running in shallow water, chasing tides, or spending long days offshore, having a dependable water pressure reading helps protect your engine from overheating or running starved of cooling water. It’s a small component with a huge role in keeping your motor healthy.

Why Buy OEM

When it comes to sensors, precision matters — and that’s where genuine Mercury Marine parts stand apart. With part number 881879T11, you’re getting a direct-fit replacement built to match your engine’s original calibration. Aftermarket versions might look similar, but they rarely match the consistency, signal quality, or durability of Mercury’s engineering.

Choosing OEM saves money over time because it eliminates the guesswork. The sensor fits right, reads right, and lasts. If a fellow boater asked which option to go with, this is the part I’d recommend every time — not because it’s flashy, but because it just works, season after season.

FAQ

Q1: Which engines does the Quicksilver Water Pressure Sensor fit?

It fits Mercury and Mariner outboards from seventy-five to three hundred horsepower, along with MerCruiser V6 and V8 multi-port fuel injection engines.

Q2: What makes this different from aftermarket sensors?

The accuracy and long-term consistency are noticeably better. OEM sensors deliver steady, reliable readings that match your engine’s original specifications.

Q3: How do I know if this is the correct replacement?

Check your owner’s manual or verify your part number. If your engine falls within the listed ranges, this is likely the correct Mercury Marine part.

Q4: Can this be used in both saltwater and freshwater?

Yes. It’s designed to withstand corrosion and constant exposure in either environment.

Q5: Is installation straightforward?

Most boat owners with basic tools can replace the sensor without trouble. The connector and mounting point are simple and accessible.