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.
Match anode material to your water type, then confirm dimensions, mounting style, and exact application.
Always confirm anode material, dimensions, fastener style, and application for your vessel, drive, engine, shaft, or underwater hardware.
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Choose the anode material, kit, or application that matches your water type and the metal component you need to protect.
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.
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.
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.
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.
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.
Martyr Zinc Streamlined Shaft Anode 25mm CMT-X25
Martyr zinc streamlined shaft anode (part #CMT-X25) for 25mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...
View full detailsMartyr Zinc Streamlined Shaft Anode 3in 76mm CMT-X13
Martyr zinc streamlined shaft anode (part #CMT-X13) for 3" (76mm) propeller shafts. Split clamp-on design with streamlined profile to minimize drag...
View full detailsMartyr Zinc Streamlined Shaft Anode 3-1/2in 89mm CMT-X15
Martyr zinc streamlined shaft anode (part #CMT-X15) for 3-1/2" (89mm) propeller shafts. Split clamp-on design with streamlined profile to minimize ...
View full detailsMartyr Zinc Streamlined Shaft Anode 3/4in 19mm CMT-X01
Martyr zinc streamlined shaft anode (part #CMT-X01) for 3/4" (19mm) propeller shafts. Split clamp-on design with streamlined profile to minimize dr...
View full detailsMartyr Zinc Streamlined Shaft Anode 30mm CMT-X30
Martyr zinc streamlined shaft anode (part #CMT-X30) for 30mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...
View full detailsMartyr Zinc Streamlined Shaft Anode 40mm CMT-X40
Martyr zinc streamlined shaft anode (part #CMT-X40) for 40mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...
View full detailsMartyr Zinc Streamlined Shaft Anode 50mm CMT-X50
Martyr zinc streamlined shaft anode (part #CMT-X50) for 50mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...
View full detailsMartyr Zinc Streamlined Shaft Anode 60mm CMT-X60
Martyr zinc streamlined shaft anode (part #CMT-X60) for 60mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...
View full detailsMartyr Zinc Teardrop Hull Anode 5-1/4x2in CMT-T21
Thought for 30s Product TitleMartyr – Zinc Teardrop Hull Anode 5-1/4 x 2 in – CMT-T21 Product DescriptionThe Martyr CMT-T21 is a zinc teardr...
View full detailsMartyr Zinc Teardrop Hull Anode Aluminum Strap 9x3in CMT-ZTSAZ
The Martyr CMT-ZTSAZ is a zinc teardrop hull anode with an aluminum strap for weld-on hull protection. Current Martyr and retailer references descr...
View full detailsMartyr Zinc Skeg Trim Tab Anode Yamaha 225-300HP CMT-61A4537100Z
The Martyr CMT-61A4537100Z is a zinc skeg / trim tab anode for select Yamaha outboards. It cross-references to Yamaha 61A-45371-00-00 and is design...
View full detailsMercury MerCruiser OEM Zinc Anode Assembly Bravo Series 806188A1
The 806188A1 is a genuine Mercury MerCruiser Quicksilver zinc anode assembly / kit. Current Mercury parts references show 806188A1 as an OEM anode ...
View full detailsMercury OEM Aluminum Power Trim Anode Kit V6 OptiMax 818298T1
The 818298T1 is a genuine Mercury MerCruiser Quicksilver aluminum anode kit designed to protect the bottom of the power trim pump assembly from gal...
View full detailsMercury MerCruiser Quicksilver Aluminum Anode Kit Bravo One 888758Q02
The 888758Q02 is a genuine Quicksilver aluminum anode kit for MerCruiser Bravo One sterndrives. Mercury’s official product listing identifies it as...
View full detailsMercury OEM Aluminum Anti-Vent Plate Anode V6 V8 V10 8M0137814 (Pack of 2)
The Mercury 8M0137814 is a genuine OEM aluminum anti-vent plate anode for select Mercury outboard applications. Mercury’s current product reference...
View full detailsVolvo Penta OEM Zinc Anode Kit IPS Pod Drive 21174476
The Volvo Penta 21174476 is a genuine OEM zinc anode kit for select IPS pod drive applications. Current Volvo Penta references identify it as part ...
View full detailsVolvo Penta OEM Anode SX Sterndrive 3586461
Volvo Penta 3586461 is a genuine OEM anode for select SX single-prop and DP-S / DP-SM duo-prop sterndrive applications. Volvo Penta’s parts shop id...
View full detailsVolvo Penta OEM Zinc Anode Kit SX Sterndrive 3588770
The Volvo Penta 3588770 is a genuine OEM zinc anode kit for select SX sterndrive applications. It is designed to provide sacrificial corrosion prot...
View full detailsMartyr Zinc Anode Lewmar 140TT Thruster 140mm CMT-589150Z
The Martyr CMT-589150Z is a zinc bow thruster anode for Lewmar 140TT thruster applications. It is designed to help protect the thruster and nearby ...
View full detailsZinc Streamlined Shaft Anode 60mm X60MM
This zinc streamlined shaft anode is designed for 60 mm propeller shafts and is used to help protect the shaft and running gear from galvanic corro...
View full detailsMax Prop Universal Zinc Anode 70mm MP70-U
Max Prop Universal Sacrificial Zinc Anode – Part No. MP70-U Protect your Max Prop from galvanic corrosion with the MP70-U Universal Sacrificial Zin...
View full detailsYamaha OEM Zinc Bracket Anode F15-F70 VF150 VF175 65W-45251-00-00
The Yamaha 65W-45251-00-00 is a genuine OEM bracket anode for select Yamaha outboard applications. It is designed to help protect the outboard brac...
View full detailsYamaha OEM Zinc Gearcase Cube Anode F30 F40 F50 F60 67C-45251-00-00
The Yamaha 67C-45251-00-00 is a genuine OEM zinc trim tab bracket anode for select Yamaha outboard applications. It is commonly described as a cube...
View full detailsYanmar OEM Zinc Anode Screw 27210-200300
The Yanmar 27210-200300 is a genuine OEM zinc anode screw used as an internal engine corrosion-protection part on select Yanmar marine diesel appli...
View full detailsMartyr Zinc Rudder Anode Set 5 Inch CMR04S
The Martyr CMR04S is a zinc rudder anode set designed to help protect rudders and trim tabs from galvanic corrosion in saltwater use. Current produ...
View full detailsAluminum Anode Kit MerCruiser Bravo One B1KA
The B1KA is an aluminum anode kit for MerCruiser Bravo One sterndrives. Current fitment references consistently describe this kit for 1988 and newe...
View full detailsMercury OEM Aluminum Power Trim Anode Verado L6 V8 880653
Quicksilver 880653 Aluminum Power Trim Assembly Anode for Mercury Verado & SeaPro Outboards Protect critical trim components from corrosion wit...
View full detailsYamaha OEM Zinc Internal Anode 63P-11325-11-00
The Yamaha 63P-11325-11-00 is a genuine OEM internal anode used on select Yamaha outboard applications. Current Yamaha parts references identify it...
View full detailsYamaha OEM Zinc Gearcase Trim Tab Anode 6CE-45373-00-00
Yamaha OEM Zinc Gearcase Trim Tab Anode 6CE-45373-00-00 Product DescriptionThe Yamaha 6CE-45373-00-00 is a genuine OEM gearcase trim tab anode for ...
View full detailsOMC OEM Anode and Screw Kit Johnson Evinrude V6 5010190
The OMC 5010190 is a genuine OEM anode and screw kit for select Johnson / Evinrude outboard applications. Current OEM parts listings identify 50101...
View full detailsMartyr Zinc Handlebar Anode Yamaha Outboard CM6G54525101Z
The Martyr CM6G54525101Z is a zinc handlebar-style transom bracket anode for select Yamaha outboard applications. It is commonly cross-referenced t...
View full detailsVolvo Penta OEM Aluminum Anode Kit IPS-A IPS3 23172846
The Volvo Penta 23172846 is a genuine OEM aluminum anode kit for select IPS-A marine propulsion applications. Current parts references identify it ...
View full detailsVolvo Penta OEM Zinc Tie Bar Steering Anode DPH DPR 3807400
Volvo Penta OEM Zinc Tie Bar Steering Anode DPH DPR 3807400 Product DescriptionThe Volvo Penta 3807400 is a genuine OEM zinc tie bar steering anode...
View full detailsVolvo Penta OEM Aluminum Cavitation Plate Anode DPI DPH DPR 23520859
The Volvo Penta 23520859 is a genuine OEM aluminum anode for select Volvo Penta sterndrive applications. Volvo Penta’s official parts shop identifi...
View full detailsVolvo Penta OEM Aluminum Anode Kit 290 DP SP Series 23986753
The Volvo Penta 23986753 is a genuine OEM aluminum anode kit for select Volvo Penta sterndrive applications. Volvo Penta lists 23986753 as an anode...
View full detailsVolvo Penta Sacrificial Zinc Anode – Part 3861634
Volvo Penta Sacrificial Zinc Anode – Part No. 3861634 Product DescriptionProtect your sterndrive from galvanic corrosion with the genuine Volvo Pen...
View full detailsVolvo Penta Sacrificial Zinc Anode – Part 3863193
Volvo Penta Sacrificial Zinc Anode – Part No. 3863193 Product DescriptionKeep your sterndrive protected with the genuine Volvo Penta 3863193 alumin...
View full detailsMartyr Aluminum Prop Anode Side-Power 31180 CMT-SGSP31180A
The Martyr CMT-SGSP31180A is an aluminum replacement anode for Side-Power / Sleipner thruster applications using the 31180-style prop anode. It is ...
View full detailsYamaha Outboard Anode – 67F-11325-00-00 – Sacrificial Zinc Anode
Yamaha Outboard Sacrificial Zinc Anode – Part 67F-11325-00-00 Key features and specs Yamaha part number: 67F-11325-00-00. Product type: internal...
View full detailsZinc Hull Plate Anode 4-5/8" x 2-1/2" CMT-ZHC2AZ
The CMT-ZHC2AZ (Martyr CMZHC2AZ) is a compact bolt-on zinc hull plate anode designed to protect underwater hull surfaces and bonded metal component...
View full detailsZinc Hull Plate Anode 6-1/4" x 2-3/4" CMT-ZHC3AZ
The CMT-ZHC3AZ (Martyr CMZHC3AZ) is a bolt-on zinc hull plate anode designed to protect underwater hull surfaces from galvanic corrosion. Installed...
View full detailsYamaha Zinc Crankcase Anode 68V-11325-02-00
The Yamaha 68V-11325-02-00 is a genuine OEM zinc crankcase anode designed to protect internal engine components from galvanic corrosion. Installed ...
View full detailsYamaha Magnesium Anode 6AW-1132P-00-00
The Yamaha 6AW-1132P-00-00 is a genuine OEM internal engine anode (often referred to as “Anode 5”) designed to protect cylinder head and crankcase ...
View full detailsYamaha Zinc Crankcase Anode 6G8-11325-00-00
The Yamaha 6G8-11325-00-00 is a genuine OEM zinc crankcase anode designed to protect internal engine components from galvanic corrosion. Instal...
View full detailsBennett Trim Tab Aluminum Anode Kit A 194-CMBNT1AA
The 194-CMBNT1AA (commonly referenced as CMBNT1AKITA kit A) is an aluminum trim tab anode kit designed specifically for Bennett trim tab systems. T...
View full detailsYamaha Zinc Crankcase Anode 63P-11325-01-00
The Yamaha 63P-11325-01-00 is a genuine OEM zinc anode designed to protect Yamaha outboard engines from galvanic corrosion. Commonly used as a cran...
View full detailsVolvo Penta Aluminum Anode Kit 23164609
The Volvo Penta 23164609 is a genuine OEM aluminum anode kit engineered to protect Volvo Penta drive systems and underwater components from galvani...
View full detailsVolvo Penta Aluminum Anode Kit 23615636
The Volvo Penta 23615636 is a genuine OEM aluminum anode kit designed for 130 and 150 series saildrives, providing corrosion protection for the low...
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