Mercury – 200-Amp Fuse | Electrical Protection Series | Marine-Grade Blue Fuse | 8M0161644

Overview

If you’ve spent enough time around boats, you know that electrical protection isn’t something you appreciate until the moment you need it. A fuse may look small and unassuming, but it stands between your engine and the kind of damage no boater ever wants to experience. That’s why Mercury Marine part 8M0161644 carries so much quiet value. It’s the kind of part you trust without even thinking about it — the safeguard that keeps you running smoothly whether you’re cruising across a glassy bay at sunrise or pushing home through choppy afternoon winds. With the right fuse in place, you can focus on the water, not the wiring.

Key Features

• Genuine 200-amp marine fuse designed for Mercury and MerCruiser applications.
• Blue, easy-to-identify housing for quick visual inspection.
• Built to SAE electrical protection standards.
• Engineered for high-current systems found in modern outboards and sterndrives.
• Durable construction that resists vibration, heat, and corrosion in marine environments.

Engine & Boat Compatibility

• Fits select Mercury outboard models requiring a 200-amp main fuse
• Compatible with many MerCruiser sterndrive engines using high-current distribution systems
• Common on center consoles, pontoons, bowriders, offshore fishing boats, and multi-engine setups
• Suitable for boats with complex electrical accessories, high-output charging systems, or heavy demand circuits

Performance & Practical Benefits

A fuse may not make your engine faster or quieter, but it plays a crucial role in keeping everything running the way it should. When this Mercury 200-amp fuse is installed, you’ll feel the difference not through sound or motion, but in the confidence that your system is properly protected. It’s built to handle the heavy electrical loads of modern rigs — large displays, pumps, lighting, hydraulic steering support, stereo systems, and all the little accessories that make a boat feel complete.

The marine-grade housing offers a tight, secure fit that resists the constant vibration every boat deals with. It doesn’t loosen, rattle, or corrode prematurely. The blue coloring makes it easy to identify when you’re troubleshooting or performing routine maintenance, saving time and removing guesswork. And when a surge does happen — maybe a short, maybe a wiring issue — the fuse responds instantly, protecting the heart of your system before damage can spread.

Installation is straightforward and doesn’t require any special tools beyond what most boat owners already keep onboard. Once installed, the fuse simply does its job silently in the background, offering steady protection season after season.

Why Buy OEM

Electrical components are an area where guessing is expensive. Aftermarket fuses can vary in quality, response time, and construction, and even tiny differences can cause major problems in a marine system. An OEM Mercury Marine part ensures that the fuse matches the exact amperage, melting point, and build quality intended for your engine.

With a genuine Mercury fuse, you get proven reliability, consistent performance, and materials that stand up to harsh conditions. It’s cost-effective in the long run because you’re preventing electrical damage rather than reacting to it. Ask any seasoned boater: when it comes to engine protection, OEM is the practical choice every time.

FAQ

Q1: Which engines does the 8M0161644 fuse fit?

It fits select Mercury outboards and MerCruiser sterndrives that require a 200-amp main fuse.

Q2: What makes this fuse better than aftermarket alternatives?

It’s built to exact electrical standards, tested for marine conditions, and engineered specifically for Mercury systems.

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

Check your existing fuse or your engine’s manual for a 200-amp specification.

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

Yes — the marine-grade design resists corrosion in either environment.

Q5: Is installation straightforward?

Very. Most boaters can replace this fuse using standard tools and basic electrical access.