Sierra 18-6160A Mercruiser Bravo II & III Anode Kit - Aluminum

Protect your Mercruiser Bravo II or III sterndrive from the harsh effects of galvanic corrosion with this high-performance aluminum anode kit. Designed for boaters who demand reliability in saltwater, brackish, or freshwater environments, this kit delivers superior protection without compromising on durability or ease of use. Whether you're prepping for a long offshore trip or routine maintenance, swapping out worn anodes keeps your outdrive running smoothly and extends its lifespan significantly.

Engineered for Maximum Protection

Aluminum anodes excel in a wide range of water conditions, offering better efficiency than zinc in low-salinity areas while holding up well against the aggressive corrosion of saltwater. They attract corrosive elements away from critical components like the propeller shaft, gear case, and trim rams, acting as a sacrificial barrier. Boaters often notice less pitting and erosion on their drives after consistent use, saving thousands in potential repair costs down the line.

Perfect Fit for Mercruiser Bravo Drives

This kit is tailored specifically for Mercruiser Bravo II and Bravo III sterndrives, ensuring a seamless replacement for OEM parts. It covers all essential anode locations: the gear case, trim cylinder, and transom assembly. No guesswork needed—everything aligns perfectly with factory specs, making it a go-to choice for DIY mechanics and professional marine techs alike.

Kit Contents and Quality Build

• Gear case anode for comprehensive lower unit protection
• Trim cylinder anodes to shield hydraulic components
• Transom anode for upper assembly safeguarding
• Premium aluminum construction for optimal electrochemical performance
• Precision-machined for exact OEM fitment

Each piece undergoes rigorous testing to meet or exceed marine industry standards, providing peace of mind whether you're hauling gear for fishing charters or weekend cruises.

Step-by-Step Installation Guide

Replacing anodes is a straightforward task that most boat owners can handle in under an hour with basic tools. Here's how:

1. Power down and remove your boat from the water or tilt the drive for access.
2. Clean the mounting surfaces thoroughly to ensure good contact.
3. Remove old anodes using a wrench or socket set—note their positions.
4. Apply marine-grade anti-seize to threads and install new anodes, torquing to spec (typically 15-20 ft-lbs; check your service manual).
5. Inspect nearby zincs or straps for wear and reconnect any grounding wires.
6. Lower the drive, launch, and monitor for the first few outings.

Pro tip: Always wear gloves to avoid skin contact with residue, and double-check electrical grounds to maximize anode effectiveness.

Smart Maintenance Practices

To get the most from your anodes, inspect them every 3-6 months or after 50 hours of use, depending on water salinity. Look for erosion greater than 50%—that's your cue to replace. Pair this kit with a proper shaft brush and hull cleaner routine for all-around corrosion defense. In high-conductivity waters, consider adding a corrosion monitor to track performance in real-time.

Why Boaters Trust This Setup

Backed by years of real-world testing on everything from center consoles to sport yachts, this aluminum kit strikes the ideal balance of protection, longevity, and value. It's not just a replacement—it's an upgrade that keeps your Mercruiser humming through seasons of heavy use. Skip the guesswork of mismatched parts and invest in reliability that matches the open water's demands.