Mercury – Low Oil Switch | 2-Stroke Outboards & Jet Drive | OEM Precision | 856156T02

Overview

When you’re out on the water, every sound and signal matters — and knowing your engine’s oil level is one of the most important. The Quicksilver 856156T02 Low Oil Switch gives you that peace of mind. Designed for select Mercury and Mariner 2-Stroke outboards and the 200HP OptiMax Jet Drive, this switch keeps constant watch over your oil reservoir and alerts you when it’s time to refill. It’s a small component that plays a big role in preventing engine damage, giving you the confidence to stay focused on what you love most — the ride, the water, and the open horizon.

Key Features

• Genuine Mercury Marine low oil switch
• Designed for select Mercury and Mariner 2-Stroke outboards and the 200HP OptiMax Jet Drive
• Installs directly into the 2-Stroke oil reservoir tank
• Sends a precise signal to alert the operator when oil levels are low
• Built from marine-grade, corrosion-resistant materials for longevity
• Designed and tested to meet Mercury OEM quality standards
• Simple replacement using common shop tools

Engine & Boat Compatibility

• Fits Mercury and Mariner 2-Stroke outboards
• Compatible with the 200HP OptiMax Jet Drive
• Designed for use with 2-Stroke oil reservoir systems
• Ideal for a variety of setups including bass boats, pontoons, skiffs, and jet boats
• Suitable for both freshwater and saltwater use
• Always refer to your owner’s manual or service manual for exact fitment confirmation

Performance & Practical Benefits

The Mercury 856156T02 Low Oil Switch might be a small part, but it does big work. When oil runs low, this switch immediately signals your system — giving you time to add oil before any harm is done to your engine. That’s the kind of quiet protection that most boaters don’t think about until they need it.

You’ll notice how seamlessly it integrates into your setup. Installation is straightforward and clean, with factory-fit precision that prevents leaks and ensures a solid electrical connection. Once installed, it works quietly in the background, keeping tabs on your oil reservoir and giving you clear feedback through your warning system.

Whether you’re running wide open on a two-stroke Pro XS or easing through shallow water with a jet drive, this switch ensures your engine is always protected. It’s a small investment that guards one of your most valuable assets — your outboard’s life and reliability.

Why Buy OEM

With a part this vital, precision and reliability matter. The Quicksilver 856156T02 is built to the exact specifications of your engine, ensuring that oil level readings are accurate and dependable. Aftermarket versions often fall short in calibration or sealing, leading to false readings or premature failure.

By choosing genuine Mercury OEM parts, you’re choosing the same level of engineering that built your outboard in the first place. OEM components are designed to fit perfectly, resist corrosion, and perform in the demanding conditions marine engines face every day. It’s not just about replacing a part — it’s about preserving performance, avoiding costly repairs, and ensuring your outboard stays dependable for years to come.

FAQ

Q1: Which Mercury engines or systems does the Low Oil Switch fit?

It’s designed for select Mercury and Mariner 2-Stroke outboards and the 200HP OptiMax Jet Drive.

Q2: What makes this part different from aftermarket alternatives?

Quicksilver’s OEM construction ensures precise signaling, better materials, and long-lasting reliability that aftermarket switches can’t match.

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

Check your owner’s manual or service guide for part number 856156T02 to confirm compatibility with your specific outboard.

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

Yes, it’s built from corrosion-resistant materials suited for all marine environments.

Q5: Is installation straightforward for most boat owners?

Absolutely. It installs easily with standard tools and fits directly into your existing oil reservoir system.