Mercury BLMX 12.3X9 87818A45

Mercury – Black Max 3-Blade Aluminum Propeller | 12.25" Diameter x 9" Pitch | Right-Hand Rotation | 3-Blade | Aluminum | Phantom Black Finish | 87818A45 Overview Ask any boater what they want from their prop, and most will say the same thing, smooth performance they can trust. The Mercury Black Max 3-Blade Aluminum Propeller ( 87818A45) delivers exactly that. It’s not about flash or fancy talk, it’s about a prop that simply works, trip after trip. When you ease out of the marina or open up across calm morning water, you’ll feel its steady grip and balanced thrust doing what Mercury props do best: making every ride feel confident and controlled. Key Features Diameter and Pitch: 12.25 " Diameter x 9 " Pitch Rotation: Right-Hand Rotation Blade Count: 3-Blade Design for smooth acceleration and predictable handling Material: Patented Mercalloy Aluminum Alloy – durable, flexible, and impact-resistant Finish: Mercury Phantom Black glossy enamel for corrosion resistance and sharp appearance Hub System: Includes Flo-Torq Reflex Hub Kit (835257K12) for impact absorption and drivetrain protection Design Details: Balanced blade geometry ensures smooth lift and efficient thrust in all conditions Engine & Boat Compatibility This Mercury propeller fits a wide range of smaller outboards, making it a reliable choice for recreational and work boats alike. Designed for Mercury and Mariner 25–30 HP FourStroke BigFoot/Command Thrust outboards Fits 30 HP TwoStroke and 30 HP FourStroke (2005 and earlier) models Compatible with 40–60 HP FourStroke outboards Ideal for small runabouts, fishing boats, and pontoons that demand steady performance and reliability Performance Benefits The Black Max 3-Blade Aluminum Propeller with a 9-inch pitch is built for quick lift and responsive control — perfect for smaller boats that need solid push without overloading the motor. You’ll feel its clean bite the moment you hit the throttle, pulling your boat onto plane with confidence and staying steady through corners. I t’s a prop that grips without struggle, providing a smooth ride even when the water gets unpredictable. At cruising speed, it holds its pace effortlessly, delivering efficient performance that keeps fuel consumption in check. T he Mercalloy aluminum construction strikes the right balance between strength and forgiveness — it’s tough enough to handle light impacts but flexible enough to prevent serious damage. The Phantom Black enamel gives it a sleek, protective finish that stands up well in both saltwater and freshwater. It’s a prop that performs as well on the last day of the season as it did on the first. Why this prop is a smart real-world choice: Mercury OEM quality: Designed, tested, and proven for perfect engine pairing. Reliable and easy to maintain: Built from strong yet forgiving Mercalloy aluminum. Cost-effective vs. stainless: Great performance at a more accessible price. Versatile fit across multiple setups: Ideal for a wide range of smaller Mercury outboards and boat styles. FAQ Q1: Which Mercury engines does the Mercury Black Max 3-Blade Propeller fit? It fits Mercury and Mariner 25–30 HP FourStroke BigFoot/Command Thrust, 30 HP TwoStroke, 30 HP FourStroke (2005 and earlier), and 40–60 HP FourStroke outboards. Q2: What makes this propeller different from other Mercury options? This model is built with Mercury’s proprietary Mercalloy aluminum alloy, providing the ideal mix of durability, performance, and flexibility. It also includes the Flo-Torq Reflex Hub Kit for added drivetrain protection. Q3: How do I know if this pitch or size is right for my boat? A 12.25 " diameter and 9 " pitch are perfect for smaller boats that need quick acceleration, strong low-end power, and smooth cruising control. Q4: Can this prop be used in both saltwater and freshwater? Yes. Its Phantom Black enamel finish resists corrosion and wear in both environments, making it a solid all-purpose option. Q5: What hub system does it use? It comes equipped with Mercury’s Flo-Torq Reflex Hub Kit (835257K12) , which absorbs impact and protects your engine’s drivetrain from sudden shocks.

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