Mercury – Prop Nut, Front | V12 Contra-Rotating Prop System | Brass | 8M0176914

Overview

When you run a V12 outboard, you expect everything behind the transom to feel rock solid. There’s a certain confidence that comes from knowing each part — even the small ones you rarely see — is built to handle serious water and serious power. The Mercury Prop Nut 8M0176914 is one of those pieces. It’s not flashy, but it quietly holds the heart of your propulsion system together, keeping both props working in perfect rhythm no matter where you’re running. Offshore chop, long coastal runs, slow trolling passes — it just does its job, and that peace of mind is worth more than most people realize.

Key Features

• Secures the front propeller in a Mercury V12 contra-rotating prop system
• Constructed from hardened, durable brass for long-term strength
• Precision-machined to withstand extremely high torque loads
• Designed to exceed Mercury Marine’s rigorous performance standards
• Mercury Marine part number 8M0176914

Engine & Boat Compatibility

This genuine Mercury Marine part is engineered for:

• Mercury 7.6L V12 600hp Verado outboards
• Mercury 7.6L V12 500hp SeaPro outboards
• Ideal on offshore center consoles, heavy commercial vessels, large multi-engine boats, premium cruising hulls, and performance fishing platforms

Performance & Practical Benefits

Running a V12 isn’t like running any other outboard. The torque is massive, the hydrodynamics are unique, and the dual-prop setup demands absolute stability. The front prop nut is the anchor point that keeps everything tight and balanced. With this brass nut installed, the prop feels secure and responsive, especially when you push the throttle hard from a standstill or make long high-speed runs.

What you’ll notice most is the smoothness — that steady, deliberate bite as both props dig in without chatter or slip. A secure prop nut also means less vibration transferring up through the hull, which translates to a quieter, cleaner ride. And since this nut is built from hardened marine-grade brass, it resists the wear and corrosion that can develop under constant load. It’s exactly the kind of durability you want protecting a multi-figure investment in propulsion.

Installation is straightforward. The threads engage cleanly, the torque holds consistently, and the fit feels like it was designed for your engine — because it was.

Why Buy OEM

On a system as advanced as the Mercury V12, there’s no room for guesswork. An aftermarket prop nut might look similar, but the metallurgy, torque rating, and machining tolerances rarely match OEM standards. This nut is built by the same engineers who designed the prop system itself, so you know it seats properly, holds under load, and protects your gearbox and props from unnecessary stress.

Buying genuine OEM is really about protecting performance, safety, and long-term reliability. When you’re running V12 horsepower, that’s not optional — it’s essential.

FAQ

Q1: Which engines does this prop nut fit?

It fits Mercury 7.6L V12 500hp SeaPro and 600hp Verado outboards.

Q2: What makes it better than aftermarket versions?

OEM brass, exact torque specs, and factory machining ensure proper fitment and long-term strength.

Q3: How do I confirm it’s the correct replacement?

Match the part number and confirm compatibility with your owner’s manual or existing hardware.

Q4: Is it suitable for freshwater and saltwater?

Yes — the brass construction provides strong corrosion resistance in both environments.

Q5: Is installation simple for most owners?

Yes, as long as you have the correct torque specs and basic tools.