Mercury – Quicksilver Low-Oil Switch Assembly | Engine Protection | Resin-Encapsulated Construction | 856156T04

Overview

There’s a certain calm that settles in when you know your engine is watching out for you as much as you’re watching the horizon. That’s exactly what you feel with the Mercury Marine part number 856156T04 Low-Oil Switch Assembly on board. It’s the kind of quiet confidence that lets you push out a little farther, stay out a little longer, and trust that your engine will speak up when something needs your attention. When you spend your weekends on the water, you learn real quick which parts you can rely on—and this is one of them.

Key Features

• Designed to monitor and signal low-oil conditions before problems occur
• Durable resin-encapsulated switch and cable to protect electrical components
• Built with marine-tested materials for strength and long-term performance
• Engineered for tight, secure fitment within Mercury oil alert systems
• Helps ensure safe operation during both extended runs and short idle sessions

Engine & Boat Compatibility

• Works with a wide range of Mercury outboard engines featuring low-oil alert systems
• Ideal for mid-range to high-horsepower two-stroke and four-stroke platforms
• Suitable for use in fishing boats, pontoons, center consoles, bay boats, runabouts, and family cruisers
• Compatible with Mercury applications requiring the 856156T04 low-oil alert component

Performance & Practical Benefits

You’ll notice the difference this part makes not because it calls attention to itself, but because it quietly does its job trip after trip. A low-oil warning system isn’t something you want guessing; you want it steady, responsive, and trustworthy. The encapsulated construction keeps moisture, vibration, and corrosion at bay, giving the switch a long, healthy life even in rough marine environments. It connects cleanly, communicates clearly, and helps safeguard your engine from the kind of wear that sneaks up on boaters who rely on less dependable components.

Whether you’re easing through a narrow channel or running hard across open water, this assembly helps your system respond the moment oil levels drop. There’s a comfort in that—knowing your engine won’t leave you guessing. It’s a small part with a huge role, and the way it integrates seamlessly into Mercury’s engineering makes every outing feel a bit more secure.

Why Buy OEM

Choosing a genuine Mercury Marine part is one of those decisions seasoned boaters barely have to think about anymore. It just saves time, money, and frustration. Mercury designs these components to match their engines perfectly, so you’re not fighting poor alignment or questionable materials. Aftermarket versions may look similar, but they rarely offer the same long-term reliability that comes from engineers who know the system from the inside out. When you go with OEM, you get a part that installs right the first time, lasts longer, and protects your engine investment without extra fuss.

FAQ

Q1: Which Mercury engines or systems does the Quicksilver 856156T04 Low-Oil Switch Assembly fit?

It’s compatible with many Mercury outboards equipped with oil alert systems that specify this switch assembly. If your engine relies on the 856156T04 part number, this is the correct match.

Q2: What makes this part different from aftermarket alternatives?

This is a genuine Mercury Marine part built with tested materials, precise engineering, and resin encapsulation that holds up far better in harsh marine conditions.

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

Check your engine’s manual or existing switch for the part number. If you see 856156T04, you’re in the right place.

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

Absolutely. Its protected construction and marine-tested durability make it dependable in either environment.

Q5: Is installation straightforward for most boat owners?

Most owners find it simple, especially if they’re familiar with basic electrical connections on Mercury engines. The fit is clean and intuitive.