Mercury – Float Switch | Fuel Level System | Marine-Grade Construction | 8M6000359

Overview

If you’ve spent any amount of time running a Mercury outboard, you know how much trust you place in the gauges at your helm. When the water stretches out in every direction and the shoreline shrinks behind you, you want to know exactly how much fuel you’ve got left—and you want that number to be right. The Mercury Float Switch 8M6000359 is one of those small, behind-the-scenes parts that quietly keeps you confident. It delivers the kind of accuracy and consistency that lets you enjoy the ride instead of second-guessing your fuel system.

This isn’t a part you think about often, but when it works flawlessly, you feel it. That confidence, especially miles from home, is worth its weight in gold.

Key Features

• Designed to properly monitor fuel level in compatible Mercury outboards
• Marine-tested construction for long-term durability
• Provides up to one million switch cycles for lasting reliability
• Float arrives pre-positioned at the upper float stop
• Built to Mercury Marine part number 8M6000359 specifications for exact fit and function

Engine & Boat Compatibility

• Fits Mercury 75–115hp FourStroke outboards
  • Serial numbers 1B366823–2B094995
• Fits L4 135–175hp Verado outboards
  • Serial numbers 1B227000–2B576734
• Fits L6 200–300hp Verado outboards
  • Serial numbers 0T980000–2B144122
• Common on:
  • Center consoles
  • Pontoon boats
  • Aluminum fishing boats
  • Runabouts and sport boats

Performance & Practical Benefits

A dependable float switch doesn’t just report fuel level—it affects how relaxed you feel every time you push the throttle. With this Mercury Marine part installed, movement inside the tank translates smoothly and accurately to your fuel gauge. No sudden drops. No erratic readings. Just a steady, honest picture of what you’ve got left.

You’ll notice how confidently you can plan longer runs, how much easier it is to track usage, and how reassuring it feels during those low-idle moments heading back through a narrow channel. The construction is solid and marine-ready, built to handle tank slosh, vibration, and years of hard use. Once in place, it works quietly in the background, doing exactly what it’s meant to do every single time.

Installation is straightforward, and because it’s engineered to Mercury’s exact specs, it fits cleanly without fighting or improvising. It’s the kind of part you replace once and trust for seasons to come.

Why Buy OEM

Fuel systems aren’t the place to roll the dice. An aftermarket switch might fit, but it often won’t match Mercury’s precision, and that can mean inaccurate readings, premature failure, or electrical issues. With an OEM Mercury Marine part, you’re getting the real thing—built, tested, and refined for these exact engines.

You’re also protecting your investment. Accurate fuel monitoring reduces unexpected shutdowns, helps prevent running the tank too low, and keeps you in control. When you’re miles offshore, that accuracy matters a whole lot more than saving a couple bucks on a knockoff part.

FAQ

Q1: Which engines does the Float Switch 8M6000359 fit?

It fits Mercury 75–115hp FourStroke, L4 135–175hp Verado, and L6 200–300hp Verado outboards within the specified serial ranges.

Q2: What makes this different from aftermarket alternatives?

OEM accuracy, long life expectancy, and testing specifically for Mercury fuel systems.

Q3: How do I know if this is the right switch for my setup?

Check your serial number range or confirm with your owner’s manual.

Q4: Can it be used in both saltwater and freshwater environments?

Absolutely. It’s built for harsh marine conditions of all kinds.

Q5: Is installation straightforward?

Yes. Most boat owners with basic tools can replace it without difficulty.