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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

Martyr CMSXAKITZ Zinc Anode Kit – Volvo Penta SX-A / DPS Drive | Saltwater

$70.76 - $70.76
$70.76
$70.76 - $70.76
$70.76
Item locally warehoused

Martyr CMSXAKITZ Zinc Anode Kit – Volvo Penta SX-A / DPS Drive A complete zinc anode service kit for the Volvo Penta SX-A and DPS sterndrive in ful...

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$70.76 - $70.76
$70.76
$70.76 - $70.76
$70.76

Aluminum Side Power Bow Thruster Anode CMT-SGSL565A

$11.82 - $11.82
$11.82
$11.82 - $11.82
$11.82
39 in stock

The Martyr CMT-SGSL565A is an aluminum replacement bow thruster anode for select Sleipner / Side-Power thruster applications. It is designed to pro...

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$11.82 - $11.82
$11.82
$11.82 - $11.82
$11.82

Volvo Penta Zinc Anode 823661

$33.50 - $33.50
$33.50
$33.50
$33.50 - $33.50
$33.50
Only 2 left!

Volvo Penta 823661 is a genuine zinc anode used to help protect selected Volvo Penta engine cooling-system components from galvanic corrosion. Curr...

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$33.50 - $33.50
$33.50
$33.50
$33.50 - $33.50
$33.50
Sold out

Mercury Quicksilver Flat Aluminum Anode Plate | 76214Q5

$46.23 - $46.23
$46.23
$46.23 - $46.23
$46.23
Out of stock

Mercury Quicksilver Flat Aluminum Anode Plate — Part #76214Q5 The Mercury Quicksilver 76214Q5 is a genuine OEM flat aluminum anode plate designed ...

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$46.23 - $46.23
$46.23
$46.23 - $46.23
$46.23
Sold out

Quicksilver 818298Q1 Aluminum Anode — Mercury & Mariner Power Trim Pump Assembly

$43.56 - $43.56
$43.56
$43.56 - $43.56
$43.56
Item locally warehoused

Quicksilver 818298Q1 — Aluminum Sacrificial Anode | Mercury & Mariner Power Trim Pump Assembly Part Number: 818298Q1 (SKU: 710-97-818298Q1) Br...

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$43.56 - $43.56
$43.56
$43.56 - $43.56
$43.56
Sierra 9253 Outboard Maintenance Kit Mercury - Mercury V6, Optimax, 3.0L, 2-Stroke O/B's, Fits with S/N's 1B227000 and up (non-pro models)

Sierra 9253 Outboard Maintenance Kit | Mercury V6 Optimax 3.0L 2-Stroke (S/N 1B227000+, Non-Pro)

$1,082.39 - $1,082.39
$1,082.39
$1,082.39 - $1,082.39
$1,082.39
Item locally warehoused

Complete Service Kit for Mercury V6 Optimax 3.0L 2-Stroke Outboards — One Box.The Sierra 9253 Outboard Maintenance Kit is a complete, one-box servi...

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$1,082.39 - $1,082.39
$1,082.39
$1,082.39 - $1,082.39
$1,082.39
Sierra 9252 Outboard Maintenance Kit Mercury - Mercury V6, Optimax, 2.5L, 2-Stroke O/B's, Fits with S/N's 1B227000 and up (non-pro models)

Sierra 9252 Outboard Maintenance Kit | Mercury V6 Optimax 2.5L 2-Stroke (S/N 1B227000+, Non-Pro)

$647.99 - $647.99
$647.99
$647.99 - $647.99
$647.99
Item locally warehoused

Complete Service Kit for Mercury V6 Optimax 2.5L 2-Stroke Outboards — One Box.The Sierra 9252 Outboard Maintenance Kit is a complete, one-box servi...

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$647.99 - $647.99
$647.99
$647.99 - $647.99
$647.99
Sierra 9251 Outboard Maintenance Kit Mercury - Mercury 75, 90, and 115 HP, Optimax, 1.5L, 2-Stroke O/B's, Fits with S/N's 1B227000 and up

Sierra 9251 Outboard Maintenance Kit | Mercury 75–115 HP Optimax 1.5L 2-Stroke (S/N 1B227000+)

$655.19 - $655.19
$655.19
$655.19 - $655.19
$655.19
Item locally warehoused

Everything You Need for a Full Mercury Optimax Service — One Kit.The Sierra 9251 Outboard Maintenance Kit is a complete, one-box service solution f...

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$655.19 - $655.19
$655.19
$655.19 - $655.19
$655.19
Mercruiser Bravo III Anode Kit - Magnesium

Mercruiser Bravo III Anode Kit - Magnesium

$230.79 - $230.79
$230.79
$230.79 - $230.79
$230.79
Item locally warehoused

Mercruiser Bravo III Anode Kit - Magnesium

$230.79 - $230.79
$230.79
$230.79 - $230.79
$230.79
Mercruiser Alpha I Generation II Anode Kit - Aluminum

Mercruiser Alpha I Generation II Anode Kit - Aluminum

$156.59 - $156.59
$156.59
$156.59 - $156.59
$156.59
Item locally warehoused

Mercruiser Alpha I Generation II Anode Kit - Aluminum

$156.59 - $156.59
$156.59
$156.59 - $156.59
$156.59
Mercruiser Alpha I Generation II Anode Kit - Magnesium

MerCruiser Alpha One Gen II Magnesium Anode Kit – 18-6158M / 47-6158M

$276.89 - $276.89
$276.89
$276.89 - $276.89
$276.89
Item locally warehoused

MerCruiser Alpha One Gen II Magnesium Anode Kit – 18-6158M / 47-6158MThis magnesium sacrificial anode kit is designed to protect MerCruiser Alpha O...

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$276.89 - $276.89
$276.89
$276.89 - $276.89
$276.89
Mercruiser Bravo III Anode Kit - Aluminum

Mercruiser Bravo III Anode Kit - Aluminum

$128.39 - $128.39
$128.39
$128.39 - $128.39
$128.39
Item locally warehoused

Mercruiser Bravo III Anode Kit - Aluminum

$128.39 - $128.39
$128.39
$128.39 - $128.39
$128.39
Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

$8.60 - $8.60
$8.60
$8.60 - $8.60
$8.60
Item locally warehoused

Streamlined Rudder Anodes w/Slotted Hardware - Zinc

$8.60 - $8.60
$8.60
$8.60 - $8.60
$8.60
Martyr CMSZ1Z Sea Strainer Zinc Anode

Martyr CMSZ1Z Sea Strainer Zinc Anode

$13.32 - $13.32
$13.32
$13.32 - $13.32
$13.32
Item locally warehoused

Sea Strainer Anode

$13.32 - $13.32
$13.32
$13.32 - $13.32
$13.32
Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

$19.31 - $19.31
$19.31
$19.31 - $19.31
$19.31
Item locally warehoused

Streamlined Rudder Anodes w/Slotted Hardware - Zinc

$19.31 - $19.31
$19.31
$19.31 - $19.31
$19.31
Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

$27.29 - $27.29
$27.29
$27.29 - $27.29
$27.29
Item locally warehoused

Streamlined Rudder Anodes w/Slotted Hardware - Zinc

$27.29 - $27.29
$27.29
$27.29 - $27.29
$27.29
Martyr V17 Zinc Anode For Volvo Penta

Martyr V17 Zinc Anode For Volvo Penta

$15.53 - $15.53
$15.53
$15.53 - $15.53
$15.53
Item locally warehoused

Volvo zinc medium ring anode, zinc.Replaces OEM #875806-4.

$15.53 - $15.53
$15.53
$15.53 - $15.53
$15.53
Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/2" x 1-1/2"

Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/2" x 1-1/2"

$4.82 - $4.82
$4.82
$4.82 - $4.82
$4.82
Item locally warehoused

Zinc Pencil Only w/o Plug

$4.82 - $4.82
$4.82
$4.82 - $4.82
$4.82
Martyr Aluminum Anode Kit For Volvo Penta SX Engine (Contains 1-3855411, 1-3854130 and Fastening Hardware)

Martyr Aluminum Anode Kit For Volvo Penta SX Engine (Contains 1-3855411, 1-3854130 and Fastening Hardware)

$77.90 - $77.90
$77.90
$77.90 - $77.90
$77.90
Item locally warehoused

Volvo Anode Kit - For Salt And Brackish Water

$77.90 - $77.90
$77.90
$77.90 - $77.90
$77.90
Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

$53.12 - $53.12
$53.12
$53.12 - $53.12
$53.12
Item locally warehoused

Streamlined Rudder Anodes w/Slotted Hardware - Zinc

$53.12 - $53.12
$53.12
$53.12 - $53.12
$53.12
Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

Martyr Rudder/Trim Tab Zinc Anode With Stainless Steel Slotted Head

$73.38 - $73.38
$73.38
$73.38 - $73.38
$73.38
Item locally warehoused

Streamlined Rudder Anodes w/Slotted Hardware - Zinc

$73.38 - $73.38
$73.38
$73.38 - $73.38
$73.38
Martyr Aluminum Anode Kit For Mercury 75-80-90-100-115HP Engines

Martyr Aluminum Anode Kit For Mercury 75-80-90-100-115HP Engines

$44.82 - $44.82
$44.82
$44.82 - $44.82
$44.82
Item locally warehoused

Volvo Anode Kits - For Salt And Brackish Water

$44.82 - $44.82
$44.82
$44.82 - $44.82
$44.82
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$24.45 - $24.45
$24.45
$24.45 - $24.45
$24.45
Item locally warehoused

Zinc Pencils With Plug

$24.45 - $24.45
$24.45
$24.45 - $24.45
$24.45
Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/2" x 2"

Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/2" x 2"

$4.82 - $4.82
$4.82
$4.82 - $4.82
$4.82
Item locally warehoused

Zinc Pencil Only w/o Plug

$4.82 - $4.82
$4.82
$4.82 - $4.82
$4.82
Martyr Magnesium Anode Kit For Mercury 75-80-90-100-115HP Engines

Martyr Magnesium Anode Kit For Mercury 75-80-90-100-115HP Engines

$49.99 - $49.99
$49.99
$49.99 - $49.99
$49.99
Item locally warehoused

Volvo Anode Kits - For Fresh Water

$49.99 - $49.99
$49.99
$49.99 - $49.99
$49.99
Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/2" x 1-3/4"

Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/2" x 1-3/4"

$5.13 - $5.13
$5.13
$5.13 - $5.13
$5.13
Item locally warehoused

Zinc Pencil Only w/o Plug

$5.13 - $5.13
$5.13
$5.13 - $5.13
$5.13
Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/2" x 1-1/4"

Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/2" x 1-1/4"

$6.18 - $6.18
$6.18
$6.18 - $6.18
$6.18
Item locally warehoused

Zinc Pencil Only w/o Plug

$6.18 - $6.18
$6.18
$6.18 - $6.18
$6.18
Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/4" x 2"

Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1/4" x 2"

$5.13 - $5.13
$5.13
$5.13 - $5.13
$5.13
Item locally warehoused

Zinc Pencil Only w/o Plug

$5.13 - $5.13
$5.13
$5.13 - $5.13
$5.13
Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 3/8" x 1-3/4"

Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 3/8" x 1-3/4"

$3.98 - $3.98
$3.98
$3.98 - $3.98
$3.98
Item locally warehoused

Zinc Pencil Only w/o Plug

$3.98 - $3.98
$3.98
$3.98 - $3.98
$3.98
Martyr 872793 Zinc Anode For Volvo Penta

Martyr 872793 Zinc Anode For Volvo Penta

$16.37 - $16.37
$16.37
$16.37 - $16.37
$16.37
Item locally warehoused

Volvo transom triangle anode.Replaces OEM #872793.

$16.37 - $16.37
$16.37
$16.37 - $16.37
$16.37
Martyr Aluminum Anode Kit For Mercury F30-F40-F60HP Engines

Martyr Aluminum Anode Kit For Mercury F30-F40-F60HP Engines

$35.06 - $35.06
$35.06
$35.06 - $35.06
$35.06
Item locally warehoused

Volvo Anode Kits - For Salt And Brackish Water

$35.06 - $35.06
$35.06
$35.06 - $35.06
$35.06
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$9.86 - $9.86
$9.86
$9.86 - $9.86
$9.86
Item locally warehoused

Zinc Pencils With Plug

$9.86 - $9.86
$9.86
$9.86 - $9.86
$9.86
Martyr Line Cutter Zinc Anode, Model C,D,E

Martyr Line Cutter Zinc Anode, Model C,D,E

$32.22 - $32.22
$32.22
$32.22 - $32.22
$32.22
Item locally warehoused

Line Cutter Zinc Anode

$32.22 - $32.22
$32.22
$32.22 - $32.22
$32.22
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$24.14 - $24.14
$24.14
$24.14 - $24.14
$24.14
Item locally warehoused

Zinc Pencils With Plug

$24.14 - $24.14
$24.14
$24.14 - $24.14
$24.14
Martyr 875812 Zinc Anode For Volvo Penta

Martyr 875812 Zinc Anode For Volvo Penta

$42.62 - $42.62
$42.62
$42.62 - $42.62
$42.62
Item locally warehoused

Volvo saildrive ring anode, zinc.

$42.62 - $42.62
$42.62
$42.62 - $42.62
$42.62
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$7.97 - $7.97
$7.97
$7.97 - $7.97
$7.97
Item locally warehoused

Zinc Pencils With Plug

$7.97 - $7.97
$7.97
$7.97 - $7.97
$7.97
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$13.85 - $13.85
$13.85
$13.85 - $13.85
$13.85
Item locally warehoused

Zinc Pencils With Plug

$13.85 - $13.85
$13.85
$13.85 - $13.85
$13.85
Martyr 838929 Zinc Anode For Volvo Penta

Martyr 838929 Zinc Anode For Volvo Penta

$9.02 - $9.02
$9.02
$9.02 - $9.02
$9.02
Item locally warehoused

Volvo pencil anode, zinc.

$9.02 - $9.02
$9.02
$9.02 - $9.02
$9.02
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$9.86 - $9.86
$9.86
$9.86 - $9.86
$9.86
Item locally warehoused

Zinc Pencils With Plug

$9.86 - $9.86
$9.86
$9.86 - $9.86
$9.86
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$8.49 - $8.49
$8.49
$8.49 - $8.49
$8.49
Item locally warehoused

Zinc Pencils With Plug

$8.49 - $8.49
$8.49
$8.49 - $8.49
$8.49
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$21.30 - $21.30
$21.30
$21.30 - $21.30
$21.30
Item locally warehoused

Zinc Pencils With Plug

$21.30 - $21.30
$21.30
$21.30 - $21.30
$21.30
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$9.12 - $9.12
$9.12
$9.12 - $9.12
$9.12
Item locally warehoused

Zinc Pencils With Plug

$9.12 - $9.12
$9.12
$9.12 - $9.12
$9.12
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$9.86 - $9.86
$9.86
$9.86 - $9.86
$9.86
Item locally warehoused

Zinc Pencils With Plug

$9.86 - $9.86
$9.86
$9.86 - $9.86
$9.86
Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

Martyr Engine Cooling System Zinc Anode Complete With Brass Plug

$11.12 - $11.12
$11.12
$11.12 - $11.12
$11.12
Item locally warehoused

Zinc Pencils With Plug

$11.12 - $11.12
$11.12
$11.12 - $11.12
$11.12
Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 3/4" x 3-3/8"

Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 3/4" x 3-3/8"

$10.70 - $10.70
$10.70
$10.70 - $10.70
$10.70
Item locally warehoused

Zinc Pencil Only w/o Plug

$10.70 - $10.70
$10.70
$10.70 - $10.70
$10.70
Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1-1/2" x 5/8"

Martyr Engine Cooling System Replacement Zinc Anode (Brass Plug Not Included), 1-1/2" x 5/8"

$6.08 - $6.08
$6.08
$6.08 - $6.08
$6.08
Item locally warehoused

Zinc Pencil Only w/o Plug

$6.08 - $6.08
$6.08
$6.08 - $6.08
$6.08
Martyr CM68V1132501A Yamaha Internal Anode, Aluminum

Martyr CM68V1132501A Yamaha Internal Anode, Aluminum

$20.15 - $20.15
$20.15
$20.15 - $20.15
$20.15
Item locally warehoused

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

$20.15 - $20.15
$20.15
$20.15 - $20.15
$20.15
Martyr 823661 Zinc Anode For Volvo Penta

Martyr 823661 Zinc Anode For Volvo Penta

$16.16 - $16.16
$16.16
$16.16 - $16.16
$16.16
Item locally warehoused

Volvo pencil anode, zinc

$16.16 - $16.16
$16.16
$16.16 - $16.16
$16.16