Mercury Anode 856581C

Mercury – Aluminum Anode Assembly for Sport Jet Engines | Corrosion Protection | Marine-Grade Aluminum | 856581C Overview If you’ve ever run a Sport Jet hard through shallow rivers, fast-moving channels, or long stretches of open lake, you know how much your engine relies on every component working in harmony. Corrosion isn’t dramatic—it doesn’t shout or shake the boat—but it quietly eats away at the parts you depend on. That’s why a solid anode gives you such peace of mind. With the Mercury Marine part number 856581C Aluminum Anode Assembly in place, you know your jet pump and internal components have the protection they need, whether you’re carving through saltwater flats or idling upriver at sunrise. It’s the kind of shield you install once and rely on all season long. Key Features Protects critical metal components from galvanic corrosion Made from marine-grade aluminum for balanced performance in both fresh and saltwater Designed to sacrifice itself to preserve engine and jet pump surfaces Precision-fit casting for stable, secure mounting Built to meet Mercury’s engineering standards for long-term durability Engine & Boat Compatibility Fits Mercury 120XR2 Sport Jet (serial numbers 0E145580–0E379999) Fits Mercury 175XR2 Sport Jet (0F345000–0E433153) Also compatible with: 200 Direct Fuel Injection (0E379931–0E428850) 200 Direct Fuel Injection M2 (0E379931–0E423075) 210 Carbureted M2 (0E370718–0E426999) 240 Electronic Fuel Injection (0E406400 and up) 240 Electronic Fuel Injection M2 (0E370718 and up) 250 Direct Fuel Injection (0E407100 and up) 250 Direct Fuel Injection M2 (0E407100 and up) Ideal for jet boats, river runners, sport boats, and shallow-water performance hulls Performance & Practical Benefits A good anode doesn’t change how your engine sounds or feels—what it changes is your confidence. With the 856581C installed, your Sport Jet system gains a dependable layer of protection that quietly works every minute your boat sits in the water. The aluminum material reacts predictably, offering steady sacrificial protection without wearing down prematurely or leaving the engine vulnerable. The fit is tight and secure, which makes installation painless and gives you that immediate sense of “this part was made for my engine.” Once installed, you don’t have to babysit it. It holds up to vibration, constant water flow, and the tough conditions jet boats routinely face. Whether you run through brackish inlets or pure freshwater lakes, the aluminum alloy keeps corrosion under control. In real use, it feels like insurance—the good kind. You’ll notice fewer worries about pitting, less anxiety about unseen damage, and more freedom to enjoy your boat the way it was meant to be enjoyed. It’s one of those simple parts that plays a huge role in keeping your investment healthy. Why Buy OEM Corrosion protection isn’t something to gamble on. A genuine Mercury Marine part like the 856581C isn’t just shaped right—it’s engineered with the correct alloy blend, casting quality, and mounting accuracy your Sport Jet requires. Aftermarket anodes may look similar, but too often the metal composition is off, causing either accelerated wear or inadequate protection. With OEM, you’re getting long-term reliability, precise fitment, and the assurance that the part was built specifically for your jet drive system. It’s the kind of purchase seasoned boaters make without hesitation because it simply works better and lasts longer. FAQ Q1: Which engines does the Mercury 856581C Aluminum Anode Assembly fit? It fits Mercury Sport Jet models including 120XR2, 175XR2, and multiple 200, 210, 240, and 250 series engines listed by serial range. Q2: What makes this anode better than aftermarket versions? Mercury uses a precise aluminum alloy blend that delivers the correct rate of sacrificial protection, ensuring your engine and jet pump are shielded properly. Q3: How do I know if this is the correct replacement? Match your engine’s serial range and part number. If your model lists 856581C, you’ve got the right fit. Q4: Can it be used in both freshwater and saltwater? Yes, marine-grade aluminum performs exceptionally well in both environments, making it a versatile choice for mixed-use boating. Q5: Is installation straightforward? Absolutely. Most boaters find it quick and simple thanks to the precise OEM fit and clean mounting design

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