23974203 Anode Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta anodes are made to sacrifice themselves in order to protect the drive and propeller from galvanic corrosion. Volvo Penta now recommends aluminium anodes in salt and brackish water instead of the zinc previously recommended for salt water, and is gradually phasing out and replacing most of its zinc anodes with aluminium ones. Aluminium anodes give 30% higher corrosion protection capacity, up to 20-40% longer life span in salt water compared with similarly sized zinc anodes, a lower environmental impact, and are the better choice for brackish water too. Magnesium is the material listed for fresh water. This is the aluminium anode listed for folding propeller hub, 2-blade and 3-blade saildrive folding propellers, and 4-blade shaft folding propellers, supplied for salt and brackish water.

🚤 Compatibility

• Engine Family: D, HS, ZF, MS, MD
• HP Range: 13-480 HP

Full model list at the end of this description.

⚙️ Key Features

• For 2-blade and 3-blade saildrive folding propellers and 4-blade shaft folding propellers
• Aluminium, for salt and brackish water
• 0.159 kg
• 163 applications across the D, HS, ZF, MS and MD series
• Fresh water equivalent is magnesium anode 3858400
• Aluminium anode for Folding propeller hub, 2-blade and 3-blade saildrive folding propellers, and 4-blade shaft folding propellers.
• Listed for salt and brackish water.
• Aluminium anodes give 30% higher corrosion protection capacity than a similarly sized zinc anode.
• Up to 20-40% longer life span in salt water than a similarly sized zinc anode.
• Lower environmental impact, and the better choice for brackish water as well as salt.
• Aluminium anodes can be used for all types of hull material.
• Volvo Penta anodes feature, where needed, an internal reinforcement made from an alloy that does not erode, which also ensures a reliable electrical connection between the anode and the drive.
• Material: aluminium
• Fits: Folding propeller hub, 2-blade and 3-blade saildrive folding propellers, and 4-blade shaft folding propellers
• Aluminium sacrificial anode for the folding propeller hub position
• Fits 2-blade and 3-blade folding propellers on saildrive, and 4-blade folding propellers on shaft
• Position: folding propeller hub
• Water type: Salt and brackish water
• Fits: 2-blade and 3-blade folding propellers on saildrive, and 4-blade folding propellers on shaft

📋 Kit Contents

• 3 × aluminium anode segments - serviced together as 23974203
• 1 × mounting-hardware set - supplied within 23974203; individual hardware numbers are not published

🔌 Function

Sacrifices itself to protect the folding propeller hub and the adjacent underwater metals from galvanic corrosion.

⚠️ Common Signs of Failure

• Segments consumed to around half their original size
• Uneven erosion between the segments
• Cracked, loose or missing segments
• Corrosion appearing on the propeller hub
• Damaged or missing mounting hardware

🛠️ Service Notes

• No hub anode is listed for a 3-blade shaft folding propeller - the catalogue directs those installations to the anode for shaft mounting instead
• Fit onto clean bare metal so the anode is electrically connected to the hub, and leave it unpainted
• If the set has been stored dry, reactivate the faces with emery paper before launching, and keep wire brushes and other steel tools off them
• Salt and brackish water: aluminium (or, on some older drives, cadmium-free zinc marked Zn). Fresh water: magnesium.
• When installing a new anode it is important to have good contact between the anode and the surface to which it is connected.
• If an anode has been exposed to air for a long time it can be covered by a passivating surface film that prevents it working properly; consider reactivating it with emery paper before launching. Do not use sandpaper, a wire brush or other steel tools when cleaning, as these may damage the galvanic protection.
• Water flow, salinity, temperature, pollution levels and stray current considerably affect anode life.
• Read the operator's manual for detailed information on maintaining and replacing anodes.
• Volvo Penta now recommends aluminium anodes in salt and brackish water, in place of the zinc previously recommended for salt water
• Aluminium anodes are listed as giving 30% higher corrosion protection capacity and up to 20-40% longer life in salt water than similarly sized zinc anodes, with lower environmental impact, and as the better choice for brackish water too
• Magnesium is the material listed for fresh water
• For some older drives, cadmium-free zinc anodes, marked Zn, are supplied for salt and brackish water instead of aluminium
• Volvo Penta anodes carry, where needed, an internal reinforcement in an alloy that does not erode, which also keeps a reliable electrical connection between the anode and the drive
• An anode that has been exposed to air for a long time can be covered by a passivating surface film that stops it working properly; consider reactivating it with emery paper before launching the boat
• Refer to the Operator's Manual for maintenance and replacement detail for your own product
• For 3-blade folding propellers on a shaft, use the anode for shaft mounting - no separate hub anode is listed for that combination

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 23974203 → Supersedes 3858399

OEM / Related Numbers

• 3858399 earlier number superseded by this part
• 3584247 related reference
• 3858955 related reference
• 3858400 magnesium alternative
• Boatanode24: VP023, 9230AL
• Tecnoseal magnesium fresh-water alternative: 00728MGKIT

Aftermarket / Verified Equivalents

• Tecnoseal aluminium: 00728AL, 00728ALKIT
• Martyr aluminium: CM3858399KITA
• Sierra aluminium: CM3858399A
• Orbitrade: 19499-1
• Tecnoseal: 00728AL
• Martyr: CM3858399A

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D4-260I-C, D4-260I-D, D4-260I-E, D4-260I-F, D4-180I-C, D4-225I-C, D4-180I-D, D4-225I-D, D4-180I-E, D4-225I-E, D4-180I-F, D4-225I-F, D4-300I-C, D4-300I-D, D4-300I-E, D4-300I-F, D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-145I-G, D4-175 VG
• Volvo Penta D6-280I-D, D6-310I-D, D6-280I-E, D6-310I-E, D6-300I-F, D6-330I-C, D6-330I-D, D6-280I-C, D6-310I-C, D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300I-G, D6-330I-F, D6-370I-F, D6-435I-C, D6-435I-D, D6-435I-E, D6-435I-F, D6-330I-E
• Volvo Penta 130SR-C, 130S, 130S-C, 130S-B, 130SR, 130SR-A, 130SR-B, 150S, 150S-B, 150SR, 150SR-B, 130S-D, 130SR-D, 150S-D, 150SR-D, 150S-C, 150SR-C
• Volvo Penta D2-40, D2-40B, D2-40F, D2-55, D2-55B, D2-55C, D2-55D, D2-55E, D2-55F, D2-50F, D2-75, D2-75B, D2-75C, D2-75F, D2-60F
• Volvo Penta D3-110I-C, D3-130I-C, D3-220I-G, D3-110I-G, D3-150I-G, D3-170I-G, D3-200I-G, D3-110I-H, D3-160I-C, D3-190I-C, D3-150I-H, D3-170I-H, D3-200I-H, D3-220I-H
• Volvo Penta HS63AE, HS63VE, HS63V, HS63IVE, HS63AE-A, HS63C, HS63IV, HS63IVE-D, HS63AE-D, HS63AE-C, HS63A
• Volvo Penta D1-30, D1-30B, D1-30F, D1-13, D1-13B, D1-13F, D1-20, D1-20B, D1-20F
• Volvo Penta ZF280IVE, ZF280AE, ZF280A, ZF280IV, ZF280, ZF280AE-B
• Volvo Penta HS45A, HS45AE, HS45A-B, HS45AE-B, HS45AE-C
• Volvo Penta HS25A, HS25A-B, HS25, HS25AE-A
• Volvo Penta MS10A-A, MS10A-B, MS10L-A, MS10L-B
• Volvo Penta MS15L-A, MS15A-A, MS15A-B, MS15L-B
• Volvo Penta D9A2F, D9A2H, D9A2K
• Volvo Penta HS85AE, HS85IVE, HS85IVE-A
• Volvo Penta MD2010B, MD2010-C, MD2010-D
• Volvo Penta MD2020B, MD2020-C, MD2020-D
• Volvo Penta MD2030B, MD2030-C, MD2030-D
• Volvo Penta MD2040B, MD2040-C, MD2040-D
• Volvo Penta MS25L, MS25A-A, MS25A
• Volvo Penta ZF63, ZF63-E, ZF63C
• Volvo Penta HS68A-A, HS68IV-A
• Volvo Penta HS80AE
• Volvo Penta ZF25