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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

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Canada Metals Martyr Diver's Dream Hull Anode Zinc 12x6x1/2 CMDIVERZ

$84.62 - $84.62
$84.62
$84.62
$84.62 - $84.62
$84.62
Out of stock

Canada Metals Martyr CMDIVERZ is a Diver's Dream hull anode sized 12" x 6" x 1/2" with slotted holes. Current product listings identify it under LN...

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$84.62 - $84.62
$84.62
$84.62
$84.62 - $84.62
$84.62
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Yanmar Zinc Engine Anode – 119574-18790-01

$15.41 - $15.41
$15.41
$15.41
$15.41 - $15.41
$15.41
Out of stock

Yanmar 119574-18790-01 is a zinc pencil-style engine anode used in select Yanmar marine diesel applications. Public listings consistently identify ...

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$15.41 - $15.41
$15.41
$15.41
$15.41 - $15.41
$15.41
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Yanmar Zinc Anode 119574-44150

$13.40 - $13.40
$13.40
$13.40
$13.40 - $13.40
$13.40
Out of stock

Yanmar 119574-44150 is a genuine OEM zinc engine anode used in Yanmar marine diesel cooling-system applications. It is commonly described as a smal...

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$13.40 - $13.40
$13.40
$13.40
$13.40 - $13.40
$13.40
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Martyr Zinc Prop Nut Anode Style H Spare 194-CMPNZH

$87.03 - $87.03
$87.03
$87.03
$87.03 - $87.03
$87.03
Out of stock

Martyr CMPNZH is a zinc replacement propeller nut anode for Style H applications. Current product listings identify it under LNS SKU 194-CMPNZH and...

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$87.03 - $87.03
$87.03
$87.03
$87.03 - $87.03
$87.03
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Zinc Pencil Anode 3/8" NPT x 1/2" x 2" – CMT-E1

$11.56 - $11.56
$11.56
$11.56
$11.56 - $11.56
$11.56
Out of stock

Martyr CMT-E1 is a zinc pencil anode sized 3/8" NPT x 1/2" x 2", used to help protect marine engine cooling passages, heat exchangers, and related ...

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$11.56 - $11.56
$11.56
$11.56
$11.56 - $11.56
$11.56
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Martyr Zinc Teardrop Hull Anode 3-1/2x1-3/4in CMT-T20

$10.60 - $10.60
$10.60
$10.60
$10.60 - $10.60
$10.60
Out of stock

Martyr zinc teardrop hull anode (part #CMT-T20), 3-1/2" × 1-3/4". Universal sacrificial zinc anode for keel, hull, or flat surface mounting on stee...

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$10.60 - $10.60
$10.60
$10.60
$10.60 - $10.60
$10.60
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Mercury MerCruiser OEM Aluminum Anti-Vent Plate Flat Anode 76214T5

$52.30 - $52.30
$52.30
$52.30
$52.30 - $52.30
$52.30
Out of stock

The 76214T5 is a genuine Mercury MerCruiser Quicksilver aluminum anode plate designed to fit into the anti-ventilation plate trim tab anode cavity ...

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$52.30 - $52.30
$52.30
$52.30
$52.30 - $52.30
$52.30
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Mercury MerCruiser \ OEM Aluminum Prop Nut Anode Kit Bravo III \ 865182Q01

$40.24 - $40.24
$40.24
$40.24
$40.24 - $40.24
$40.24
Out of stock

The 865182Q01 is a genuine Mercury MerCruiser Quicksilver aluminum prop nut anode kit for Bravo III sterndrives. Mercury identifies it as the prop ...

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$40.24 - $40.24
$40.24
$40.24
$40.24 - $40.24
$40.24
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Zinc Transom Bracket Anode Yamaha V4 V6 2-Stroke 6G5-45251-02-00

$49.60 - $49.60
$49.60
$49.60
$49.60 - $49.60
$49.60
Out of stock

The Yamaha 6G5-45251-02-00 is a genuine OEM transom bracket anode for select Yamaha outboard applications. It is designed to help protect the outbo...

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$49.60 - $49.60
$49.60
$49.60
$49.60 - $49.60
$49.60
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Aluminum Rudder Anode 3-3/4" CMR03AL 194-CMR03AL

$15.63 - $15.63
$15.63
$15.63
$15.63 - $15.63
$15.63
Out of stock

The CMR03AL (194-CMR03AL) is a marine-grade aluminum rudder anode sized at 3-3/4", providing sacrificial cathodic protection for rudder assemblies,...

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$15.63 - $15.63
$15.63
$15.63
$15.63 - $15.63
$15.63
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Zinc Engine Anode E1H 3/8" UNC CMT-EZ1H

$4.91 - $4.91
$4.91
$4.91
$4.91 - $4.91
$4.91
Out of stock

The CMT-EZ1H is a zinc engine anode (E1H style) with 3/8" UNC thread, designed to protect internal engine cooling systems from galvanic corrosion. ...

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$4.91 - $4.91
$4.91
$4.91
$4.91 - $4.91
$4.91
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Zinc Rudder Anode 3-3/4" CMT-R03

$27.86 - $27.86
$27.86
$27.86
$27.86 - $27.86
$27.86
Out of stock

The CMT-R03 is a 3-3/4" zinc rudder anode (R-3 style) designed to protect rudders and trim tabs from galvanic corrosion in saltwater environments. ...

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$27.86 - $27.86
$27.86
$27.86
$27.86 - $27.86
$27.86
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Mercury OEM Aluminum Anode Plate V6 V8 FourStroke 175-300HP 8M0111654

$59.99 - $59.99
$59.99
$59.99
$59.99 - $59.99
$59.99
Out of stock

Mercury / MerCruiser Quicksilver Anode Plate — 8M0111654 The Mercury Quicksilver 8M0111654 Anode Plate is a genuine OEM sacrificial corrosion anod...

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$59.99 - $59.99
$59.99
$59.99
$59.99 - $59.99
$59.99
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