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Over 50 years of Trusted Marine Service

Sacrificial Anodes

Marine Sacrificial Anodes & Corrosion Protection

Shop Marine Sacrificial Anodes

Find zinc anodes, aluminum anodes, magnesium anodes, anode kits, shaft anodes, trim tab anodes, engine anodes, outdrive anodes, propeller anodes, and installation hardware for corrosion protection in saltwater, brackish water, and freshwater applications.

Shop Sacrificial Anodes Zinc Anodes Anode Kits
Material Guide

Match anode material to your water type, then confirm dimensions, mounting style, and exact application.

Read Corrosion Protection Guide

Always confirm anode material, dimensions, fastener style, and application for your vessel, drive, engine, shaft, or underwater hardware.

Volvo Penta Mercury / MerCruiser Yanmar Crusader Indmar PCM Shaft Anodes Trim Tab Anodes Outdrive Anodes Propeller Anodes Engine Anodes

Top OEM Anode Searches

Volvo Penta Mercury / MerCruiser Yanmar Crusader Indmar PCM

Highlighted Anode Categories

Zinc AnodesCommon saltwater protection Aluminum AnodesSaltwater and brackish use Magnesium AnodesFreshwater applications Anode KitsMatched service sets Shaft AnodesProp shaft protection Trim Tab AnodesTabs and planes Engine AnodesCooling-system protection Outdrive AnodesSterndrive protection Propeller AnodesProp and hub protection

Browse Fast

Shop by Anode Category

Choose the anode material, kit, or application that matches your water type and the metal component you need to protect.

All Sacrificial Anodes Zinc Anodes Aluminum Anodes Magnesium Anodes Anode Kits Shaft Anodes Installation Hardware

Why It Matters

Anodes Help Protect Underwater Metals from Corrosion

Sacrificial anodes are designed to corrode before more valuable underwater metals such as shafts, propellers, trim tabs, outdrives, thru-hulls, and engine cooling components.

Using the correct anode material and replacing anodes before they are fully consumed helps reduce galvanic corrosion and supports longer component life.

H2O

Match Water Type

Zinc is commonly used for saltwater, aluminum can work in saltwater and brackish water, and magnesium is typically used for freshwater applications.

FIT

Confirm Shape and Size

Check diameter, length, hole spacing, thread, mounting hardware, contact surface, and whether the anode fits a shaft, tab, drive, engine, or propeller.

KIT

Use Kits When Possible

Anode kits help replace multiple matched pieces on a drive or engine at the same time, reducing missed parts during seasonal service.

Parts Desk Guidance

Single Anode or Complete Kit?

If one anode is damaged, missing, or consumed faster than the rest, a single replacement may be enough. For seasonal service or unknown history, a complete anode kit can be the better choice because it refreshes all key protection points together.

Choose zinc anodes For many saltwater applications where zinc is specified by the manufacturer or existing setup.
Choose aluminum anodes For many saltwater and brackish applications, especially where aluminum anodes are specified for drives or kits.
Choose magnesium anodes For freshwater applications where magnesium is required and saltwater exposure is not expected.
Choose anode kits For matched replacement sets on outdrives, engines, trim systems, thrusters, or other grouped applications.

Common Questions

Sacrificial Anode Buying Help

How do I choose the correct anode material?

Start with the water type and manufacturer recommendation. Zinc is often used in saltwater, aluminum is common for saltwater or brackish use, and magnesium is typically for freshwater.

When should sacrificial anodes be replaced?

Replace anodes when they are heavily wasted, loose, damaged, missing, or near half consumed. Inspect them regularly and during seasonal service.

Can I mix zinc, aluminum, and magnesium anodes?

Avoid mixing anode materials on the same bonded system unless the manufacturer specifically allows it. Mixed materials can reduce protection or cause uneven performance.

Why do anode dimensions matter?

Anodes need solid metal-to-metal contact and the correct mounting shape. Wrong dimensions, paint, loose fasteners, or poor contact can prevent proper protection.

Ready to Find Your Part?

Search Zinc, Aluminum, Magnesium Anodes & Kits

Use the collection page or search by water type, brand, application, kit, drive model, shaft size, or existing part number.

Shop All Anodes Corrosion Guide Volvo Penta Mercury / MerCruiser Yanmar Crusader Indmar PCM

Filters

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Martyr Limited Clearance Shaft Anode With Stainless Steel Allen Head, Zinc

Martyr Limited Clearance Shaft Anode With Stainless Steel Allen Head, Zinc

$23.09 - $23.09
$23.09
$23.09 - $23.09
$23.09
In stock

Limited Clearance Shaft Anode w/Allen Screw

$23.09 - $23.09
$23.09
$23.09 - $23.09
$23.09
Martyr 875821 Anode For Volvo Penta

Martyr 875821 Anode For Volvo Penta

$32.22 - $32.22
$32.22
$32.22 - $32.22
$32.22
In stock

Volvo duo prop ring anode, aluminum.

$32.22 - $32.22
$32.22
$32.22 - $32.22
$32.22
Martyr Limited Clearance Shaft Anode With Stainless Steel Allen Head, Zinc

Martyr Limited Clearance Shaft Anode With Stainless Steel Allen Head, Zinc

$23.09 - $23.09
$23.09
$23.09 - $23.09
$23.09
In stock

Limited Clearance Shaft Anode w/Allen Screw

$23.09 - $23.09
$23.09
$23.09 - $23.09
$23.09
Bravo III Anode Kit - Zinc

Bravo III Anode Kit - Zinc

$82.73 - $82.73
$82.73
$82.73 - $82.73
$82.73
In stock

Bravo III 2004-present.Bravo 3 Kit Includes:CM762145 Trim TabCM821630C2 Driveshaft HousingCM806190 Trim Ram (2)CM762144 Trim TabCM865182C Prop Nut

$82.73 - $82.73
$82.73
$82.73 - $82.73
$82.73
Martyr CMM24 Zinc Hull Anode .7" x 1.92" x 4.36"

Martyr CMM24 Zinc Hull Anode .7" x 1.92" x 4.36"

$12.69 - $12.69
$12.69
$12.69 - $12.69
$12.69
In stock

Hull Anode - Zinc.Hole dimension is the distance between holes.

$12.69 - $12.69
$12.69
$12.69 - $12.69
$12.69
Martyr 852835 Anode For Volvo Penta

Martyr 852835 Anode For Volvo Penta

$30.89 - $30.89
$30.89
$30.89 - $30.89
$30.89
In stock

Volvo transom bar anode, magnesium.

$30.89 - $30.89
$30.89
$30.89 - $30.89
$30.89
Martyr 852835 Anode For Volvo Penta

Martyr 852835 Anode For Volvo Penta

$37.16 - $37.16
$37.16
$37.16 - $37.16
$37.16
In stock

Volvo transom bar anode, zinc.

$37.16 - $37.16
$37.16
$37.16 - $37.16
$37.16
Bravo III Anode Kit - Aluminum

Bravo III Anode Kit - Aluminum

$72.23 - $72.23
$72.23
$72.23 - $72.23
$72.23
In stock

Bravo III 2004-present.Bravo 3 Kit Includes:CM762145 Trim TabCM821630C2 Driveshaft HousingCM806190 Trim Ram (2)CM762144 Trim TabCM865182C Prop Nut

$72.23 - $72.23
$72.23
$72.23 - $72.23
$72.23
Martyr 76214 Anode For Mercury Mercruiser

Martyr 76214 Anode For Mercury Mercruiser

$17.63 - $17.63
$17.63
$17.63 - $17.63
$17.63
In stock

Martyr 76214 Anode For Mercury Mercruiser.Outboard Skeg Anode.

$17.63 - $17.63
$17.63
$17.63 - $17.63
$17.63
Bravo III Anode Kit - Magnesium

Bravo III Anode Kit - Magnesium

$142.19 - $142.19
$142.19
$142.19 - $142.19
$142.19
In stock

Bravo III 2004-present.Bravo 3 Kit Includes:CM762145 Trim TabCM821630C2 Driveshaft HousingCM806190 Trim Ram (2)CM762144 Trim TabCM865182C Prop Nut

$142.19 - $142.19
$142.19
$142.19 - $142.19
$142.19
Mercruiser Bravo II & III Anode Kit - Magnesium

Mercruiser Bravo II & III Anode Kit - Magnesium

$115.49 - $115.49
$115.49
$115.49 - $115.49
$115.49
In stock

Fits Bravo II 1989-present, Bravo III 1989-2003.Bravo 23 Kit IncludesCM762145 Trim TabCM821630C2 Driveshaft HousingCM806190 Trim Ram (2)

$115.49 - $115.49
$115.49
$115.49 - $115.49
$115.49
Mercruiser Bravo II & III Anode Kit - Zinc

Mercruiser Bravo II & III Anode Kit - Zinc

$73.49 - $73.49
$73.49
$73.49 - $73.49
$73.49
In stock

Fits Bravo II 1989-present, Bravo III 1989-2003.Bravo 23 Kit IncludesCM762145 Trim TabCM821630C2 Driveshaft HousingCM806190 Trim Ram (2)

$73.49 - $73.49
$73.49
$73.49 - $73.49
$73.49
Walter Keel Anode, Zinc, 3-1/4" L x 3-1/4" W x 1-1/8" H

Walter Keel Anode, Zinc, 3-1/4" L x 3-1/4" W x 1-1/8" H

$18.79 - $18.79
$18.79
$18.79 - $18.79
$18.79
In stock

Zinc: For use in salt water

$18.79 - $18.79
$18.79
$18.79 - $18.79
$18.79
Martyr 832598 Anode For Volvo Penta

Martyr 832598 Anode For Volvo Penta

$32.12 - $32.12
$32.12
$32.12 - $32.12
$32.12
In stock

Volvo transom plate anode, zinc.

$32.12 - $32.12
$32.12
$32.12 - $32.12
$32.12
Mercruiser Bravo I Anode Kit - Zinc

Mercruiser Bravo I Anode Kit - Zinc

$77.90 - $77.90
$77.90
$77.90 - $77.90
$77.90
In stock

Includes:CM762145 Trim TabCM806188 Bearing CarrierCM821630C2 Driveshaft HousingCM806190 Trim Ram (2)

$77.90 - $77.90
$77.90
$77.90 - $77.90
$77.90
Mercruiser Bravo II & III Anode Kit - Aluminum

Mercruiser Bravo II & III Anode Kit - Aluminum

$72.86 - $72.86
$72.86
$72.86 - $72.86
$72.86
In stock

Fits Bravo II 1989-present, Bravo III 1989-2003.Bravo 23 Kit IncludesCM762145 Trim TabCM821630C2 Driveshaft HousingCM806190 Trim Ram (2)

$72.86 - $72.86
$72.86
$72.86 - $72.86
$72.86
Martyr Anode Kit For Volvo Penta DPH Engine (Contains 1-3588745, 1-3863206 and Fastening Hardware)

Martyr Anode Kit For Volvo Penta DPH Engine (Contains 1-3588745, 1-3863206 and Fastening Hardware)

$62.99 - $62.99
$62.99
$62.99 - $62.99
$62.99
In stock

CMDPHKIT Includes:CM3588745 (1)CM3863206 (1)SXA/DPS Drive Anode Kit.Comes complete with anodes, hardware and install instructions.

$62.99 - $62.99
$62.99
$62.99 - $62.99
$62.99
Martyr 852835 Anode For Volvo Penta

Martyr 852835 Anode For Volvo Penta

$32.22 - $32.22
$32.22
$32.22 - $32.22
$32.22
In stock

Volvo transom bar anode, aluminum.

$32.22 - $32.22
$32.22
$32.22 - $32.22
$32.22
Martyr CMDPHKITZ Anode Kit For Volvo Penta DPH Engine (Contains 1-3588745, 1-3863206 and Fastening Hardware)

Martyr CMDPHKITZ Anode Kit For Volvo Penta DPH Engine (Contains 1-3588745, 1-3863206 and Fastening Hardware)

$73.17 - $73.17
$73.17
$73.17 - $73.17
$73.17
In stock

CMDPHKIT Includes:CM3588745 (1)CM3863206 (1)SXA/DPS Drive Anode Kit.Comes complete with anodes, hardware and install instructions.

$73.17 - $73.17
$73.17
$73.17 - $73.17
$73.17
Martyr CMDIVER Hull Anode 1/2" x 6" x 12", Zinc

Martyr CMDIVER Hull Anode 1/2" x 6" x 12", Zinc

$84.62 - $84.62
$84.62
$84.62 - $84.62
$84.62
In stock

Diver's Dream Hull Anode

$84.62 - $84.62
$84.62
$84.62 - $84.62
$84.62
Martyr CMDIVERMINI Hull Anode 6" x 4" x 1/2", Magnesium

Martyr CMDIVERMINI Hull Anode 6" x 4" x 1/2", Magnesium

$36.69 - $36.69
$36.69
$36.69 - $36.69
$36.69
In stock

Diver's Dream Hull Anode

$36.69 - $36.69
$36.69
$36.69 - $36.69
$36.69
Martyr CMDIVER Hull Anode 1/2" x 6" x 12", Magnesium

Martyr CMDIVER Hull Anode 1/2" x 6" x 12", Magnesium

$86.09 - $86.09
$86.09
$86.09 - $86.09
$86.09
In stock

Diver's Dream Hull Anode

$86.09 - $86.09
$86.09
$86.09 - $86.09
$86.09
Martyr CMDIVERMINI Hull Anode 6" x 4" x 1/2", Zinc

Martyr CMDIVERMINI Hull Anode 6" x 4" x 1/2", Zinc

$35.48 - $35.48
$35.48
$35.48 - $35.48
$35.48
In stock

Diver's Dream Hull Anode

$35.48 - $35.48
$35.48
$35.48 - $35.48
$35.48
Martyr 832598 Anode For Volvo Penta

Martyr 832598 Anode For Volvo Penta

$26.19 - $26.19
$26.19
$26.19 - $26.19
$26.19
In stock

Volvo transom plate anode, magnesium.

$26.19 - $26.19
$26.19
$26.19 - $26.19
$26.19
Mercruiser Bravo I Anode Kit - Magnesium

Mercruiser Bravo I Anode Kit - Magnesium

$129.29 - $129.29
$129.29
$129.29 - $129.29
$129.29
In stock

Includes:CM762145 Trim TabCM806188 Bearing CarrierCM821630C2 Driveshaft HousingCM806190 Trim Ram (2)

$129.29 - $129.29
$129.29
$129.29 - $129.29
$129.29
Martyr 832598 Anode For Volvo Penta

Martyr 832598 Anode For Volvo Penta

$23.72 - $23.72
$23.72
$23.72 - $23.72
$23.72
In stock

Volvo transom plate anode, aluminum.

$23.72 - $23.72
$23.72
$23.72 - $23.72
$23.72
Mercruiser Bravo I Anode Kit - Aluminum

Mercruiser Bravo I Anode Kit - Aluminum

$83.04 - $83.04
$83.04
$83.04 - $83.04
$83.04
In stock

Includes:CM762145 Trim TabCM806188 Bearing CarrierCM821630C2 Driveshaft HousingCM806190 Trim Ram (2)

$83.04 - $83.04
$83.04
$83.04 - $83.04
$83.04
Martyr CMDIVERH Hull Anode 1" x 6" x 12", Aluminum

Martyr CMDIVERH Hull Anode 1" x 6" x 12", Aluminum

$115.17 - $115.17
$115.17
$115.17 - $115.17
$115.17
In stock

Diver's Dream Hull Anode

$115.17 - $115.17
$115.17
$115.17 - $115.17
$115.17
Martyr CMDIVERH Hull Anode 1" x 6" x 12", Zinc

Martyr CMDIVERH Hull Anode 1" x 6" x 12", Zinc

$174.92 - $174.92
$174.92
$174.92 - $174.92
$174.92
In stock

Diver's Dream Hull Anode

$174.92 - $174.92
$174.92
$174.92 - $174.92
$174.92
Martyr CMDIVER Hull Anode 1/2" x 6" x 12", Aluminum

Martyr CMDIVER Hull Anode 1/2" x 6" x 12", Aluminum

$60.15 - $60.15
$60.15
$60.15 - $60.15
$60.15
In stock

Diver's Dream Hull Anode

$60.15 - $60.15
$60.15
$60.15 - $60.15
$60.15
Martyr CM6H14525102Z Yamaha Transom Bar Anode, Zinc

Martyr CM6H14525102Z Yamaha Transom Bar Anode, Zinc

$38.73 - $38.73
$38.73
$38.73 - $38.73
$38.73
In stock

Aluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water

$38.73 - $38.73
$38.73
$38.73 - $38.73
$38.73
Martyr Anode Kit For Mercury Alpha I Generation II Drives 1991-Present (Contains 1-762145, 1-806105, 1-821629, 1-821631, 2-806189 and Fastening Hardware)

Martyr Anode Kit For Mercury Alpha I Generation II Drives 1991-Present (Contains 1-762145, 1-806105, 1-821629, 1-821631, 2-806189 and Fastening Hardware)

$144.69 - $144.69
$144.69
$144.69 - $144.69
$144.69
In stock

Includes:CM762145 Trim TabCM806105 Bearing CarrierCM821629C Driveshaft HousingCM821631 Gimbal HousingCM806189 Trim Ram (2)

$144.69 - $144.69
$144.69
$144.69 - $144.69
$144.69
Martyr CM6H14525102A Yamaha Transom Bar Anode, Aluminum

Martyr CM6H14525102A Yamaha Transom Bar Anode, Aluminum

$26.87 - $26.87
$26.87
$26.87 - $26.87
$26.87
In stock

Aluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water

$26.87 - $26.87
$26.87
$26.87 - $26.87
$26.87
Martyr Anode Kit For Mercury Alpha I Generation II Drives 1991-Present (Contains 1-762145, 1-806105, 1-821629, 1-821631, 2-806189 and Fastening Hardware)

Martyr Anode Kit For Mercury Alpha I Generation II Drives 1991-Present (Contains 1-762145, 1-806105, 1-821629, 1-821631, 2-806189 and Fastening Hardware)

$87.66 - $87.66
$87.66
$87.66 - $87.66
$87.66
In stock

Includes:CM762145 Trim TabCM806105 Bearing CarrierCM821629C Driveshaft HousingCM821631 Gimbal HousingCM806189 Trim Ram (2)

$87.66 - $87.66
$87.66
$87.66 - $87.66
$87.66
Martyr BRP OMC Cobra Anode Kit, Aluminum

Martyr BRP OMC Cobra Anode Kit, Aluminum

$75.17 - $75.17
$75.17
$75.17 - $75.17
$75.17
In stock

Comes complete with 3 anodes, hardware and installation instructions .CMCOBRAKIT BRP OMC Cobra Kit- Includes: CM984513 (1), CM393023 (1), CM431708 (1)

$75.17 - $75.17
$75.17
$75.17 - $75.17
$75.17
Martyr Grouper Anode With 15' Cable

Martyr Grouper Anode With 15' Cable

$152.99 - $152.99
$152.99
$152.99 - $152.99
$152.99
In stock

15' of cable Do Not connect to batteryMagnesium (Freshwater use only)

$152.99 - $152.99
$152.99
$152.99 - $152.99
$152.99
Martyr BRP OMC Cobra Anode Kit, Magnesium

Martyr BRP OMC Cobra Anode Kit, Magnesium

$78.49 - $78.49
$78.49
$78.49 - $78.49
$78.49
In stock

Comes complete with 3 anodes, hardware and installation instructions .CMCOBRAKIT BRP OMC Cobra Kit- Includes: CM984513 (1), CM393023 (1), CM431708 (1)

$78.49 - $78.49
$78.49
$78.49 - $78.49
$78.49
Martyr Grouper Anode With 15' Cable

Martyr Grouper Anode With 15' Cable

$90.92 - $90.92
$90.92
$90.92 - $90.92
$90.92
In stock

15' of cable Do Not connect to batteryAluminum for salt and brackish water

$90.92 - $90.92
$90.92
$90.92 - $90.92
$90.92
Martyr Anode Kit For Mercury Alpha I Generation II Drives 1991-Present (Contains 1-762145, 1-806105, 1-821629, 1-821631, 2-806189 and Fastening Hardware)

Martyr Anode Kit For Mercury Alpha I Generation II Drives 1991-Present (Contains 1-762145, 1-806105, 1-821629, 1-821631, 2-806189 and Fastening Hardware)

$107.82 - $107.82
$107.82
$107.82 - $107.82
$107.82
In stock

Includes:CM762145 Trim TabCM806105 Bearing CarrierCM821629C Driveshaft HousingCM821631 Gimbal HousingCM806189 Trim Ram (2)

$107.82 - $107.82
$107.82
$107.82 - $107.82
$107.82
Martyr 984547 Anode For BRP (OMC/Johnson Evinrude)

Martyr 984547 Anode For BRP (OMC/Johnson Evinrude)

$63.72 - $63.72
$63.72
$63.72 - $63.72
$63.72
In stock

Zinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water

$63.72 - $63.72
$63.72
$63.72 - $63.72
$63.72
Mercruiser Al;pha I Gen I Anode Kit, Aluminum

Mercruiser Al;pha I Gen I Anode Kit, Aluminum

$45.14 - $45.14
$45.14
$45.14 - $45.14
$45.14
In stock

Includes:CM31640 Trim TabCM55989 Gimbal Housing (2)CM821631 Gimbal Housing

$45.14 - $45.14
$45.14
$45.14 - $45.14
$45.14
Martyr CM6G54525101A Yamaha Transom Handle Anode, Aluminum

Martyr CM6G54525101A Yamaha Transom Handle Anode, Aluminum

$32.43 - $32.43
$32.43
$32.43 - $32.43
$32.43
In stock

Aluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water

$32.43 - $32.43
$32.43
$32.43 - $32.43
$32.43
Martyr Grouper Anode With 15' Cable

Martyr Grouper Anode With 15' Cable

$127.04 - $127.04
$127.04
$127.04 - $127.04
$127.04
In stock

15' of cable Do Not connect to batteryZinc for saltwater

$127.04 - $127.04
$127.04
$127.04 - $127.04
$127.04
Martyr CM6G54525101Z Yamaha Transom Handle Anode, Zinc

Martyr CM6G54525101Z Yamaha Transom Handle Anode, Zinc

$70.86 - $70.86
$70.86
$70.86 - $70.86
$70.86
In stock

Aluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water

$70.86 - $70.86
$70.86
$70.86 - $70.86
$70.86
Martyr 984547 Anode For BRP (OMC/Johnson Evinrude)

Martyr 984547 Anode For BRP (OMC/Johnson Evinrude)

$57.74 - $57.74
$57.74
$57.74 - $57.74
$57.74
In stock

Zinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water

$57.74 - $57.74
$57.74
$57.74 - $57.74
$57.74
Mercruiser Al;pha I Gen I Anode Kit, Magnesium

Mercruiser Al;pha I Gen I Anode Kit, Magnesium

$93.89 - $93.89
$93.89
$93.89 - $93.89
$93.89
In stock

Includes:CM31640 Trim TabCM55989 Gimbal Housing (2)CM821631 Gimbal Housing

$93.89 - $93.89
$93.89
$93.89 - $93.89
$93.89
Martyr 984513 Anode For BRP (OMC/Johnson Evinrude)

Martyr 984513 Anode For BRP (OMC/Johnson Evinrude)

$40.62 - $40.62
$40.62
$40.62 - $40.62
$40.62
In stock

Zinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water

$40.62 - $40.62
$40.62
$40.62 - $40.62
$40.62
Martyr CM6G54525101M Yamaha Transom Handle Anode, Magnesium

Martyr CM6G54525101M Yamaha Transom Handle Anode, Magnesium

$70.49 - $70.49
$70.49
$70.49 - $70.49
$70.49
In stock

Aluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water

$70.49 - $70.49
$70.49
$70.49 - $70.49
$70.49