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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

Filters

Zinc OMC Block Anode CMT-393023Z

$17.38 - $17.38
$17.38
$17.38 - $17.38
$17.38
6 in stock

The CMT-393023Z is a zinc block anode designed for OMC, Johnson, and Evinrude outboard and sterndrive gearcases, providing essential protection aga...

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$17.38 - $17.38
$17.38
$17.38 - $17.38
$17.38

Zinc OMC Curved Block Anode CMT-431708Z

$20.19 - $20.19
$20.19
$20.19 - $20.19
$20.19
Only 4 left!

The CMT-431708Z is a curved block zinc anode designed for OMC sterndrive systems, providing essential protection against galvanic corrosion for the...

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$20.19 - $20.19
$20.19
$20.19 - $20.19
$20.19

Mercury Verado Pro Series Aluminum Anode Kit CMT-8M0116590KITA

$114.91 - $114.91
$114.91
$114.91 - $114.91
$114.91
12 in stock

The CMT-8M0116590KITA is a complete aluminum anode kit designed for Mercury Verado Pro Series L6 350–400HP outboards, replacing all factory-install...

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$114.91 - $114.91
$114.91
$114.91 - $114.91
$114.91

Zinc Engine Anode E2 7/16" UNC CMT-EZ2

$7.23 - $7.23
$7.23
$7.23 - $7.23
$7.23
107 in stock

The CMT-EZ2 is a zinc pencil engine anode (E-2 type) with 7/16"-14 UNC thread, designed to protect internal engine cooling passages from galvanic c...

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$7.23 - $7.23
$7.23
$7.23 - $7.23
$7.23

Reliance X-40 Hull Zinc Anode

$41.88 - $41.88
$41.88
$41.88 - $41.88
$41.88
Only 5 left!

The Reliance X-40 is a zinc hull anode designed for bolt-on installation, providing reliable sacrificial corrosion protection for boat hulls and bo...

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$41.88 - $41.88
$41.88
$41.88 - $41.88
$41.88

Zinc OMC Block Anode CMT-984547Z

$76.45 - $76.45
$76.45
$76.45 - $76.45
$76.45
Only 3 left!

The CMT-984547Z is a zinc block anode designed for OMC Cobra sterndrives, providing sacrificial corrosion protection for the transom, gimbal plate,...

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$76.45 - $76.45
$76.45
$76.45 - $76.45
$76.45

Zinc Rudder Anode 5" CMT-R04

$48.00 - $48.00
$48.00
$48.00 - $48.00
$48.00
123 in stock

The CMT-R04 is a 5" zinc rudder anode (R-4 style) designed to protect rudders and trim tabs from galvanic corrosion in saltwater environments. This...

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$48.00 - $48.00
$48.00
$48.00 - $48.00
$48.00

Zinc Rudder Anode 5-1/8" CMT-R05

$74.13 - $74.13
$74.13
$74.13 - $74.13
$74.13
49 in stock

The CMT-R05 is a 5-1/8" zinc rudder anode (R-5 style) designed to protect rudders and trim tabs from galvanic corrosion in saltwater environments. ...

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$74.13 - $74.13
$74.13
$74.13 - $74.13
$74.13

Yamaha Internal Engine Anode 6E5-11325-00-00

$9.85 - $9.85
$9.85
$9.85 - $9.85
$9.85
6 in stock

The Yamaha 6E5-11325-00-00 is a genuine OEM internal zinc engine anode designed to protect internal engine components such as the cylinder head, cr...

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$9.85 - $9.85
$9.85
$9.85 - $9.85
$9.85

Yamaha Internal Engine Anode 6P3-11325-00-00

$22.21 - $22.21
$22.21
$22.21 - $22.21
$22.21
6 in stock

The Yamaha 6P3-11325-00-00 is a genuine OEM internal zinc engine anode designed to protect critical internal engine components such as the cylinder...

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$22.21 - $22.21
$22.21
$22.21 - $22.21
$22.21

Zinc Shaft Anode MDX-5 1-1/4"

$21.40 - $21.40
$21.40
$21.40 - $21.40
$21.40
7 in stock

The MDX-5 is a zinc shaft anode designed for 1-1/4" propeller shafts, providing essential sacrificial protection for inboard running gear. Installe...

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$21.40 - $21.40
$21.40
$21.40 - $21.40
$21.40

Zinc Engine Anode E3 1/2" UNC CMT-EZ3

$8.97 - $8.97
$8.97
$8.97 - $8.97
$8.97
21 in stock

The CMT-EZ3 is a zinc engine anode (E3 style) with 1/2" UNC thread, designed to protect internal engine cooling systems from galvanic corrosion. In...

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$8.97 - $8.97
$8.97
$8.97 - $8.97
$8.97

Zinc Engine Anode E4 1/2" UNC CMT-EZ4

$12.27 - $12.27
$12.27
$12.27 - $12.27
$12.27
7 in stock

The CMT-EZ4 is a zinc engine anode (E4 style) with 1/2" UNC thread, designed to protect internal engine cooling systems from galvanic corrosion. In...

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$12.27 - $12.27
$12.27
$12.27 - $12.27
$12.27

Zinc Shaft Anode MDX-7 1-1/2"

$21.66 - $21.66
$21.66
$21.66 - $21.66
$21.66
8 in stock

The MDX-7 is a sacrificial zinc shaft-style anode designed to protect outboard and inboard drivetrain components from galvanic corrosion. Installed...

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$21.66 - $21.66
$21.66
$21.66 - $21.66
$21.66

Yamaha Zinc Internal Engine Anode 67F-11325-01-00

$22.78 - $22.78
$22.78
$22.78 - $22.78
$22.78
8 in stock

The Yamaha 67F-11325-01-00 is a genuine OEM internal zinc engine anode designed to protect critical internal components such as the cylinder head a...

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$22.78 - $22.78
$22.78
$22.78 - $22.78
$22.78

Yamaha Internal Anode Grommet 67F-11328-01-00

$3.16 - $3.16
$3.16
$3.16 - $3.16
$3.16
8 in stock

Yamaha OEM Grommet, Anode 67F-11328-01-00 Price not available•See merchants Price not available•See merchants Yamaha I...

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$3.16 - $3.16
$3.16
$3.16 - $3.16
$3.16

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

$4.91 - $4.91
$4.91
$4.91 - $4.91
$4.91
17 in 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

Zinc Rudder Anode 1-7/8" CMT-R01

$9.44 - $9.44
$9.44
$9.44 - $9.44
$9.44
51 in stock

The CMT-R01 is a 1-7/8" round zinc rudder anode designed to protect rudders and trim tabs from galvanic corrosion. This two-piece “pancake” style a...

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$9.44 - $9.44
$9.44
$9.44 - $9.44
$9.44

Aluminum Side Power Propeller Anode CMT-SGSP626A

$19.17 - $19.17
$19.17
$19.17 - $19.17
$19.17
21 in stock

The CMT-SGSP626A is a marine-grade aluminum propeller anode designed specifically for Side-Power (Sleipner) thruster propeller systems. Mounted dir...

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$19.17 - $19.17
$19.17
$19.17 - $19.17
$19.17

Yamaha Engine Anode 68V-11325-01-00

$43.13 - $43.13
$43.13
$43.13 - $43.13
$43.13
8 in stock

The Yamaha 68V-11325-01-00 is a genuine OEM internal engine anode designed to protect critical engine components from galvanic corrosion. Installed...

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$43.13 - $43.13
$43.13
$43.13 - $43.13
$43.13

Yamaha Anode 6AW-1132L-00-00

$22.66 - $22.66
$22.66
$22.66 - $22.66
$22.66
8 in stock

The Yamaha 6AW-1132L-00-00 is a genuine OEM internal engine anode designed to protect critical internal components from galvanic corrosion. Install...

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$22.66 - $22.66
$22.66
$22.66 - $22.66
$22.66

Zinc Engine Anode E1 3/8" UNC CMT-EZ1

$5.63 - $5.63
$5.63
$5.63 - $5.63
$5.63
103 in stock

The CMT-EZ1 is a zinc engine anode with 3/8" UNC thread, designed to protect internal engine cooling passages and components from galvanic corrosio...

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$5.63 - $5.63
$5.63
$5.63 - $5.63
$5.63

Zinc Rudder Anode 3-3/4" 64157

$27.17 - $27.17
$27.17
$27.17 - $27.17
$27.17
42 in stock

The 64157 is a 3-3/4" zinc rudder anode designed to protect rudders and associated underwater hardware from galvanic corrosion. This two-piece (cla...

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$27.17 - $27.17
$27.17
$27.17 - $27.17
$27.17

Zinc Pencil Anode Plug ED0090802150-S Lombardini ZF 1/4 BSPT

$58.78 - $58.78
$58.78
$58.78 - $58.78
$58.78
Only 1 left!

The ED0090802150-S is a zinc anode plug used as a pencil-anode style corrosion-protection part in marine engine cooling systems. Current references...

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$58.78 - $58.78
$58.78
$58.78 - $58.78
$58.78

Aluminum Streamline Shaft Anode 1" CMT-X03AL

$12.69 - $12.69
$12.69
$12.69 - $12.69
$12.69
24 in stock

The CMT-X03AL is an aluminum streamline shaft anode designed for 1" propeller shafts, providing reliable sacrificial corrosion protection for inboa...

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$12.69 - $12.69
$12.69
$12.69 - $12.69
$12.69

Aluminum Rudder Anode 5" CMT-R04AL

$33.43 - $33.43
$33.43
$33.43 - $33.43
$33.43
26 in stock

Marine-grade aluminum rudder anode designed to provide reliable cathodic protection for your vessel's rudder assembly in saltwater environments. Th...

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$33.43 - $33.43
$33.43
$33.43 - $33.43
$33.43

Aluminum Rudder Anode 2-13/16" CMT-R02AL

$12.07 - $12.07
$12.07
$12.07 - $12.07
$12.07
22 in stock

The CMT-R02AL is a 2-13/16" aluminum rudder anode designed to protect rudders and submerged metal components from galvanic corrosion. Manufactured ...

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$12.07 - $12.07
$12.07
$12.07 - $12.07
$12.07

Aluminum Propeller Nut Anode 7/8" CMT-PNDAF14

$79.68 - $79.68
$79.68
$79.68 - $79.68
$79.68
Only 1 left!

The CMT-PNDAF14 is a 7/8" aluminum propeller nut anode designed to protect propeller nuts, shafts, and surrounding running gear from galvanic corro...

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$79.68 - $79.68
$79.68
$79.68 - $79.68
$79.68

Aluminum Hull Anode with Stainless Steel Strap 5" x 2-1/4" x 1" CMT-Z06SA

$31.91 - $31.91
$31.91
$31.91 - $31.91
$31.91
Only 3 left!

The CMT-Z06SA is a marine-grade aluminum hull anode with integrated stainless steel strap, designed to provide effective galvanic corrosion protect...

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$31.91 - $31.91
$31.91
$31.91 - $31.91
$31.91

Aluminum Hull Anode CMT-ZHC2AA

$29.58 - $29.58
$29.58
$29.58 - $29.58
$29.58
9 in stock

The CMT-ZHC2AA is a marine-grade aluminum hull anode designed to protect hull-mounted metal components from galvanic corrosion. Engineered for long...

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$29.58 - $29.58
$29.58
$29.58 - $29.58
$29.58

Martyr CMT-Z04AA Aluminum Hull Anode with Aluminum Strap – 6" x 3-1/2" x 1"

$40.80 - $40.80
$40.80
$40.80 - $40.80
$40.80
24 in stock

Martyr CMT-Z04AA Aluminum Hull Anode with Aluminum Strap – 6" × 3-1/2" × 1" Part Number CMT-Z04AA Brand Martyr Anodes Official Part Type Hu...

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$40.80 - $40.80
$40.80
$40.80 - $40.80
$40.80

Aluminum Hull Anode with Aluminum Strap 5" x 2-1/4" x 1" CMT-Z06AA

$31.91 - $31.91
$31.91
$31.91 - $31.91
$31.91
51 in stock

The CMT-Z06AA is a marine-grade aluminum hull anode with integrated aluminum strap, designed to provide effective galvanic corrosion protection for...

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$31.91 - $31.91
$31.91
$31.91 - $31.91
$31.91

Aluminum Hull Anode with Aluminum Strap 12" x 3" x 1-1/4" CMT-Z03AA

$71.28 - $71.28
$71.28
$71.28 - $71.28
$71.28
33 in stock

The CMT-Z03AA is a large-format aluminum hull anode with integrated aluminum strap, designed to deliver maximum corrosion protection for hulls and ...

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$71.28 - $71.28
$71.28
$71.28 - $71.28
$71.28

Aluminum Hull Anode 4" Style B Round 1/2" Hole CMT-H2B4375GA

$35.92 - $35.92
$35.92
$35.92 - $35.92
$35.92
45 in stock

The CMT-H2B4375GA is a 4" round Style B aluminum hull anode with a 1/2" center mounting hole, designed to protect bonded underwater metals from gal...

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$35.92 - $35.92
$35.92
$35.92 - $35.92
$35.92

Aluminum Donut Shaft Anode 1-1/2" CMT-C07AL

$29.48 - $29.48
$29.48
$29.48 - $29.48
$29.48
10 in stock

The CMT-C07AL is a 1-1/2" aluminum donut shaft anode designed to protect propeller shafts and running gear from galvanic corrosion. This two-pi...

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$29.48 - $29.48
$29.48
$29.48 - $29.48
$29.48

Aluminum Diver's Dream Hull Anode 1/2" x 4" x 6" CMT-DIVERMINIA

$33.80 - $33.80
$33.80
$33.80 - $33.80
$33.80
34 in stock

The CMT-DIVERMINIA is a low-profile aluminum hull anode designed specifically for diver-installed corrosion protection. Its slim 1/2" profile allow...

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$33.80 - $33.80
$33.80
$33.80 - $33.80
$33.80

Aluminum Diver's Dream Hull Anode 1/2" x 12" x 6" CMT-DIVERA

$64.96 - $64.96
$64.96
$64.96 - $64.96
$64.96
20 in stock

The CMT-DIVERA is a large-format low-profile aluminum hull anode designed for maximum corrosion protection on vessels requiring extended coverage. ...

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$64.96 - $64.96
$64.96
$64.96 - $64.96
$64.96

Aluminum Bolt-On Round Plate Anode 4" x 1" CMT-RP4A

$54.28 - $54.28
$54.28
$54.28 - $54.28
$54.28
7 in stock

The CMT-RP4A is a 4" diameter aluminum bolt-on round plate anode designed to provide reliable corrosion protection for hulls and underwater metal c...

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$54.28 - $54.28
$54.28
$54.28 - $54.28
$54.28

Aluminum Bennett Trim Tab Anode CMT-BNT1AKITA

$39.76 - $39.76
$39.76
$39.76 - $39.76
$39.76
14 in stock

The CMT-BNT1AKITA is a complete aluminum trim tab anode kit designed specifically for Bennett trim tab systems. Engineered to protect trim tabs and...

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$39.76 - $39.76
$39.76
$39.76 - $39.76
$39.76

Zinc Streamline Shaft Anode 1-1/2" CMT-X07

$28.01 - $28.01
$28.01
$28.01 - $28.01
$28.01
9 in stock

The CMT-X07 is a streamlined zinc shaft anode designed for 1-1/2" propeller shafts, providing reliable sacrificial corrosion protection for inboard...

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$28.01 - $28.01
$28.01
$28.01 - $28.01
$28.01

Max Prop Zinc Anode 83mm (83maxprop)

$15.49 - $15.49
$15.49
$15.49 - $15.49
$15.49
Only 5 left!

The 83mm Max Prop zinc anode is a sacrificial propeller anode designed specifically for Max-Prop feathering propellers with an 83mm hub. It protect...

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$15.49 - $15.49
$15.49
$15.49 - $15.49
$15.49

Aluminum Rudder Anode 3-3/4" CMT-R03AL

$16.52 - $16.52
$16.52
$16.52 - $16.52
$16.52
6 in stock

The CMT-R03AL is a 3-3/4" aluminum rudder anode (R-3 style) designed to protect rudders and trim tabs from galvanic corrosion. This compact clamshe...

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$16.52 - $16.52
$16.52
$16.52 - $16.52
$16.52

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

$27.86 - $27.86
$27.86
$27.86 - $27.86
$27.86
210 in 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

Mercury MerCruiser Aluminum Anode 8M0001734

$149.83 - $149.83
$149.83
$149.83 - $149.83
$149.83
Only 4 left!

OEM Aluminum Anode for Mercury MerCruiser Marine Engines Genuine Mercury MerCruiser aluminum anode provides essential corrosion protection for ster...

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$149.83 - $149.83
$149.83
$149.83 - $149.83
$149.83

Mercury MerCruiser Quicksilver Verado Power Trim Transom Anode – 97-8M0012083

$40.67 - $40.67
$40.67
$40.67 - $40.67
$40.67
Only 3 left!

The Mercury 97-8M0012083 is a genuine OEM aluminum anode designed specifically for Verado outboards, providing critical corrosion protection for th...

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$40.67 - $40.67
$40.67
$40.67 - $40.67
$40.67
Sold out

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

$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
Sold out

Mercury MerCruiser Bravo Trim Cylinder Anode 8M011349

$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99
Only 4 left!

The Mercury Quicksilver 8M011349 Trim Cylinder Anode is a genuine OEM sacrificial corrosion anode designed for MerCruiser Bravo sterndrive trim...

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$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99

Zinc Streamline Shaft Anode 7/8" | CMT-X02

$21.73 - $21.73
$21.73
$21.73 - $21.73
$21.73
52 in stock

Premium zinc streamline shaft anode designed for 7/8" propeller shafts. This hydrodynamic streamline design minimizes drag while providing essentia...

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$21.73 - $21.73
$21.73
$21.73 - $21.73
$21.73