Sierra 18-6154A Aluminum Anode Kit for Mercruiser Bravo III (2004 and Newer)

The Sierra 18-6154A is an aluminum anode kit built to protect Mercruiser Bravo III stern drives (2004 and newer) from galvanic corrosion. Sacrificial anodes work by corroding in place of the drive's underwater metal components, so replacing worn anodes on a regular schedule is one of the most important and least expensive things a boat owner can do to protect a drive from costly corrosion damage. This kit is made from aluminum, a common anode material choice for boats that operate in both fresh and brackish water where aluminum offers a good balance of protection and service life compared to zinc.

Sierra manufactures this kit to meet or exceed the performance of the original equipment anodes it replaces, and it is engineered to hold up in the harsh marine environment the drive sees day to day. Because anode wear is a visual, easy-to-check maintenance item, this kit is a straightforward replacement for boat owners performing routine drive maintenance or a service technician working through a haul-out checklist.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6154A
• Material: Aluminum
• Fitment: Mercruiser Bravo III (2004 and newer)
• Item Dimensions: 2.5 x 8.31 x 11.31 inches
• Weight: 2.98 pounds
• UPC: 808282277222, 035514302494

Fitment

• Mercruiser Bravo III drives, 2004 and newer

Frequently Asked Questions

What drive does the Sierra 18-6154A anode kit fit? The 18-6154A is built for Mercruiser Bravo III stern drives, 2004 and newer.

What material are the anodes made from? This kit, part number 18-6154A, uses aluminum anodes rather than zinc.

Why choose aluminum anodes over zinc for a Bravo III drive? Aluminum anodes are a common choice for boats that run in both fresh and brackish water, offering effective corrosion protection across a wider range of water conditions than zinc alone.

How much does the 18-6154A anode kit weigh? The kit weighs 2.98 pounds.

What are the dimensions of the anode kit packaging? The 18-6154A ships at 2.5 x 8.31 x 11.31 inches.

Is this a genuine Sierra part or aftermarket? The 18-6154A is manufactured by Sierra and is engineered to meet or exceed the performance of the original equipment anode it replaces.

How do I know when the anodes need to be replaced? Anodes are a sacrificial component that corrode over time in place of the drive's metal parts; when an anode from the 18-6154A kit is visibly wasted away, it should be replaced to keep the Bravo III drive protected.

What is included in the 18-6154A kit? The 18-6154A is sold as a complete anode kit for the Mercruiser Bravo III drive, ready to install as a set.

Does Sierra offer a warranty on this anode kit? Yes, the 18-6154A is covered under Sierra's standard limited warranty like the rest of Sierra's marine parts line.

Can this anode kit be used on drives other than Bravo III? The 18-6154A is designated for the Mercruiser Bravo III drive, 2004 and newer; no other drive fitment is specified for this kit.