{"product_id":"volvo-penta-diesel-engine-pencil-zinc-anode-fits-volvo-penta-md-tmd-tamd-d-series-replaces-838929","title":"Volvo Penta Diesel Engine Pencil Zinc Anode – Fits Volvo Penta MD\/TMD\/TAMD\/D Series (Replaces 838929)","description":"\u003ch2\u003eVolvo Penta Diesel Engine Pencil Zinc Anode – Fits MD\/TMD\/TAMD\/D Series (Replaces 838929)\u003c\/h2\u003e\n\u003cp\u003eThis high-purity zinc pencil anode is designed to protect critical marine engine components from galvanic corrosion. It is engineered to fit a wide range of Volvo Penta marine diesel engines, including the MD40A, TMD40, D4, D6, D9, D11, TAMD60–75, TAMD103, TAMD122, TAMD162C, TAMD163 series, and 2001\/2002\/2003 series.\u003c\/p\u003e\n\u003cp\u003eThis component serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring broad compatibility for maintenance and repairs.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation Method:\u003c\/strong\u003e Simple screw-in design\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFuel Compatibility:\u003c\/strong\u003e Diesel\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIncluded Parts:\u003c\/strong\u003e One pencil zinc anode with plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e800476\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e804107\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e858501\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-6001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMartyr\u003c\/td\u003e\n\u003ctd\u003eCM838929Z\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCAM\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eOEM Part No.\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eMD40A\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTMD40\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eD4 Series\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eD6 Series\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eD9 Series\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eD11 Series\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD60\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD63\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD70\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD74\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD75\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD103\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD122A\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD122P\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eD12C\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD162C\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD163A-A\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eTAMD163P-A\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e2001 Series\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003eFor salt water cooled versions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e2002 Series\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003eFor salt water cooled versions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e2003 Series\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003eFor salt water cooled versions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eAQAD30A\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eAQAD31A\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eAD31A\/B\/D\/XD\/P\/L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e838929\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePencil Zinc Anode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDiesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMale thread 7\/16\" UNC with M8 internal thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-purity zinc alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Color\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMetallic zinc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45mm length × 14mm diameter (1-3\/4\" × 9\/16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.045 kg (0.10 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7\/16\" UNC external, M8 internal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-30°C to 60°C (-22°F to 140°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther Technical Attributes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMeets MIL Spec 18001-J (Military specification for sacrificial zinc anodes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cp\u003e1 x \u003cspan style=\"color:red;\"\u003eZinc Pencil Anode (838929)\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTurn Off the Engine:\u003c\/strong\u003e Ensure the engine is completely cool and the battery is disconnected before beginning work.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLocate the Old Anode:\u003c\/strong\u003e Find the existing pencil anode on your engine block or cooling system. It will look like a bolt or plug.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRemove the Old Anode:\u003c\/strong\u003e Using an appropriately sized wrench, unscrew and remove the old anode plug. Be prepared for some water to drain out.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInspect and Clean:\u003c\/strong\u003e Clean the threads in the engine housing to remove any old sealant or corrosion.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstall the New Anode:\u003c\/strong\u003e Screw the new pencil anode in by hand until it is snug. Finish by tightening it gently with a wrench. Do not overtighten.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCheck for Leaks:\u003c\/strong\u003e Reconnect the battery, start the engine, and check for any leaks around the new anode plug.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this anode fits my engine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The best way is to check your engine's service manual for the correct part number. You can also compare our listed part numbers (Volvo Penta 838929, 800476, etc.) and compatible models in the tables above against your current part.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the purpose of a zinc anode?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: A zinc anode is a sacrificial metal that protects the vital metal components of your engine's cooling system from galvanic corrosion, which occurs when different metals are in contact in a conductive fluid like salt water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my engine's pencil anode?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Replacement intervals depend heavily on your operating conditions (salt vs. fresh water, water temperature). We recommend inspecting your anodes at least every 3-6 months. Replace the anode when it is 50% or more corroded or dissolved.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that an anode needs replacing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: A worn anode will be visibly pitted, crumbling, or significantly smaller than its original size. If the anode is missing entirely, it must be replaced immediately to prevent engine damage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: OEM vs. Aftermarket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n    \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51313339138361,"sku":"24ZA014*5","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/24ZA014_5.png?v=1758708608","url":"https:\/\/jlmmarine.com\/ru\/products\/volvo-penta-diesel-engine-pencil-zinc-anode-fits-volvo-penta-md-tmd-tamd-d-series-replaces-838929","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}