873179 Magnesium Anode | 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 magnesium anode listed for transom shield, 200-280 drives; Transom shield, 280 drive, supplied for fresh water.

🚤 Compatibility

• Engine Family: AQ, AQAD, B, AQD

Full model list at the end of this description.

⚙️ Key Features

• Transom shield anode for single prop 200-280 and duo prop 280 drives
• Magnesium, for fresh water
• 0.268 kg
• 44 applications across AQ, AQAD, B and AQD
• Salt and brackish water equivalent is zinc anode 832598
• Magnesium anode for Transom shield, 200-280 drives; Transom shield, 280 drive.
• Listed for fresh 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: magnesium
• Fits: Transom shield, 200-280 drives; Transom shield, 280 drive
• Magnesium sacrificial anode for the transom shield position
• Fits the Aquamatic single prop 200-280 drives and the duo prop 280 drive
• Position: transom shield
• Water type: Fresh water
• Fits: the Aquamatic single prop 200-280 drives and the duo prop 280 drive

🔌 Function

Corrodes in place of the drive and transom shield, giving up its own metal so theirs is left alone.

⚠️ Common Signs of Failure

• Anode wasted away, deeply pitted or more than half gone
• Anode still looking new after a season, showing it is not electrically bonded
• White powdery deposit or flaking across the surface
• Corrosion or paint blistering starting on the drive itself
• Anode loose on its fixings

🛠️ Service Notes

• Magnesium is the fresh water specification - a boat kept in salt or brackish water takes zinc anode 832598 for these positions
• Never paint an anode or its seating face; it must have bare metal contact to work
• Renew it once about half consumed rather than waiting for it to disappear
• 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

🔄 Supersession & Cross Reference

Aftermarket / Verified Equivalents

• Tecnoseal: 00707MG

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta B230, B230E, B230F, B230FB, B230FX
• Volvo Penta AQ225D, AQ225E, AQ225B, AQ225C
• Volvo Penta 230A, 230B, 250A, 250B
• Volvo Penta AQ170B, AQ170C, AQ170A
• Volvo Penta AQ200D, AQ200C, AQ200B
• Volvo Penta AQ125B, AQ125A
• Volvo Penta AQ130C, AQ130D
• Volvo Penta AQ131A, AQ131D
• Volvo Penta AQ255A, AQ255B
• Volvo Penta AQ260A, AQ260B
• Volvo Penta AQ271B, AQ271D
• Volvo Penta AQAD40B, AQAD40A
• Volvo Penta AQD21A, AQD21B
• Volvo Penta AQ120B
• Volvo Penta AQ140A
• Volvo Penta AQ145A
• Volvo Penta AQ165A
• Volvo Penta AQ175A
• Volvo Penta AQ190A
• Volvo Penta AQ290A
• Volvo Penta AQAD30A
• Volvo Penta AQD40A