Mercury – Quicksilver Oil Sensor Switch | Engine Monitoring System | Marine-Grade Electrical | 12886A6

Overview

When you spend enough time on the water, you learn to trust the quiet things — like a warning light that comes on when it should. The Mercury Marine 12886A6 Quicksilver Oil Sensor Switch is one of those parts that quietly does its job, protecting your engine without ever calling attention to itself. Built for select Mercury and Mariner 30–250 horsepower TwoStroke outboards, it monitors oil pressure so you can focus on running, not worrying. It’s a small part that adds a big layer of confidence every time you start your motor.

Key Features

• Purpose: Monitors engine oil pressure and activates warning systems when levels drop.
• Material: Constructed with marine-grade electrical components for corrosion resistance and accuracy.
• Design Detail: Compact, durable housing built to Mercury Marine OEM specifications for exact fit and reliable signal transmission.
• Performance: Provides precise, real-time pressure readings for consistent engine protection.
• Ease of Use: Installs easily using standard tools with plug-and-play wiring design.
• Compatibility: Designed for select Mercury and Mariner 30–250HP TwoStroke outboards, including Jet, SeaPro, BigFoot, Marathon, EFI, and carbureted models.

Engine & Boat Compatibility

• Fits Mercury and Mariner 30–250HP TwoStroke outboards.
• Compatible with Jet, Marathon, SeaPro, BigFoot, EFI, and carbureted engine configurations.
• Common on bay boats, pontoons, runabouts, and small offshore rigs that depend on steady oil flow for reliability.
• Ideal for both freshwater and saltwater use.

Performance & Practical Benefits

You’ll never see this part working, but you’ll appreciate what it does every time you run your boat. The 12886A6 Oil Sensor Switch ensures your engine’s warning system gets the right information, alerting you instantly if pressure drops. That split second of notice can make all the difference between a quick fix and a costly rebuild.

The sensor’s durable marine-grade design resists corrosion, vibration, and high heat — all the challenges that come with real boating. Once installed, it delivers accurate readings trip after trip, helping your engine run strong and protected. It’s one of those “install it and forget it” parts that quietly safeguards everything else.

Why Buy OEM

Oil pressure sensors are one of those components where precision matters most. The Quicksilver 12886A6 is a genuine Mercury Marine part, designed specifically for your outboard’s oil monitoring system. Aftermarket sensors might look similar, but even small variations can cause false readings or unreliable warnings — something you never want to second-guess while on the water.

With an OEM sensor, you’re getting the correct calibration, the right materials, and a fit that seals perfectly. It’s built to withstand the same salt, spray, and heat as the rest of your Mercury engine. When reliability is the goal, sticking with genuine Mercury parts isn’t just smart — it’s peace of mind.

FAQ

Q1: Which engines does the Oil Sensor Switch fit?
It fits select Mercury and Mariner 30–250HP TwoStroke outboards, including Jet, SeaPro, BigFoot, Marathon, EFI, and carbureted versions.

Q2: What makes this sensor better than aftermarket options?
It’s made to Mercury Marine’s OEM standards, offering exact fit and accurate readings under marine conditions.

Q3: How can I confirm it fits my engine?
Check your owner’s or service manual or verify the part number (12886A6) matches your original component.

Q4: Can it be used in saltwater applications?
Yes. The sealed, corrosion-resistant housing is designed for both saltwater and freshwater use.

Q5: Is installation easy?
Yes. Most boaters can install this sensor using basic hand tools — it’s a quick job that delivers lasting protection.