{"product_id":"838929-zinc-pencil-anode-for-volvo-penta-d19-d21-d27-d29-d30-d31-d32-d40-d41-d42-2001-2002-2003-jlm-marine","title":"838929 Zinc Pencil Anode for Volvo Penta D19 D21 D27 D29 D30 D31 D32 D40 D41 D42 2001 2002 2003 | JLM Marine","description":"\u003ch2\u003eZinc Pencil Anode for Volvo Penta D19 D21 D27 D29 D30 D31 D32 D40 D41 D42 2001 2002 2003\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003ezinc pencil anode\u003c\/strong\u003e is designed to protect critical engine components on \u003cstrong\u003eVolvo Penta marine diesel engines\u003c\/strong\u003e, including the D-series (D19, D21, D27, D29, D30, D31, D32, D40, D41, D42) and 2001, 2002, 2003 models. It provides galvanic corrosion protection for oil coolers, intercoolers, and cylinder heads in saltwater and brackish water environments.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket replacement directly replaces \u003cstrong\u003eVolvo Penta OEM part numbers 838929, 804107, 800476, 858501, 3838499\u003c\/strong\u003e, as well as \u003cstrong\u003eSierra 18-6001\u003c\/strong\u003e and \u003cstrong\u003eGLM 12789\u003c\/strong\u003e, ensuring seamless fitment and reliable performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMaterial: \u003cstrong\u003eZinc\u003c\/strong\u003e – optimized for saltwater use\u003c\/li\u003e\n  \u003cli\u003eThread options: \u003cstrong\u003e7\/16 UNC\u003c\/strong\u003e and \u003cstrong\u003eM8\u003c\/strong\u003e for versatile installation\u003c\/li\u003e\n  \u003cli\u003eDiameter: \u003cstrong\u003e15 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\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\u003e804107\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\u003e858501\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003e3838499\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\u003eGLM\u003c\/td\u003e\n      \u003ctd\u003e12789\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003eModel\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\u003eD19\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003eD21\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003eD27\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003eD29\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003eD30\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003eD31\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003eD32\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003eD40\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003eD41\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003eD42\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003e2001\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003e2002\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n      \u003ctd\u003e2003\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\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\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003eZinc\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDiameter\u003c\/td\u003e\n      \u003ctd\u003e15 mm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eThread Type\u003c\/td\u003e\n      \u003ctd\u003e7\/16 UNC, M8\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eOil Cooler, Intercooler, Cylinder Head\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Number\u003c\/td\u003e\n      \u003ctd\u003e838929\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Zinc Pencil Anode\u003c\/strong\u003e\u003c\/span\u003e (OEM #838929)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is completely cool and the cooling system is depressurized before beginning work.\u003c\/li\u003e\n  \u003cli\u003eLocate the existing zinc pencil anode on the oil cooler, intercooler, or cylinder head (consult your engine manual for exact locations).\u003c\/li\u003e\n  \u003cli\u003eUse an appropriate wrench to carefully unthread and remove the old anode. Inspect the threads for damage or debris.\u003c\/li\u003e\n  \u003cli\u003eClean the mounting hole and surrounding area to remove any corrosion or old sealant residue.\u003c\/li\u003e\n  \u003cli\u003eApply a small amount of anti-seize compound to the threads of the new zinc anode to ease future removal.\u003c\/li\u003e\n  \u003cli\u003eThread the new anode into the mounting hole by hand first to ensure proper alignment and avoid cross-threading.\u003c\/li\u003e\n  \u003cli\u003eTighten the anode to the manufacturer's specified torque using a torque wrench (typically \u003cstrong\u003e15–20 Nm\u003c\/strong\u003e; verify in your service manual).\u003c\/li\u003e\n  \u003cli\u003eRefill the cooling system if any coolant was drained, and bleed air from the system per manufacturer procedures.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and check for leaks around the anode installation points.\u003c\/li\u003e\n  \u003cli\u003eInspect the anode regularly (every \u003cstrong\u003e100–200 hours\u003c\/strong\u003e or annually) and replace when more than 50% depleted.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if this anode fits my Volvo Penta engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Check the Compatible Engine Models table above for your engine model (D19, D21, D27, D29, D30, D31, D32, D40, D41, D42, 2001, 2002, 2003). Cross-reference the OEM part numbers (838929, 804107, 800476, 858501, 3838499) with your engine's parts list or service manual to confirm fitment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the zinc pencil anode?\u003c\/strong\u003e\u003cbr\u003e\nA: Inspect the anode every \u003cstrong\u003e100–200 operating hours\u003c\/strong\u003e or at least once per season. Replace it when more than 50% of the zinc material has eroded. In saltwater or high-use conditions, more frequent replacement may be necessary.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my anode needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Visible erosion or pitting of the zinc material, corrosion appearing on nearby engine components (oil cooler, intercooler, cylinder head), or coolant leaks around the anode installation point all indicate it's time to replace the anode.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this zinc anode in freshwater?\u003c\/strong\u003e\u003cbr\u003e\nA: Zinc anodes are optimized for \u003cstrong\u003esaltwater and brackish water\u003c\/strong\u003e environments. For freshwater use, aluminum or magnesium anodes are generally recommended. Consult your engine manual for the correct anode material for your operating environment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between OEM and aftermarket anodes?\u003c\/strong\u003e\u003cbr\u003e\nA: 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\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: 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\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: 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\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\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\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\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":51983452602681,"sku":"24ZA014","price":22.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Aad266f2b1935454fa3748e894c1b32a6o.webp?v=1772505276","url":"https:\/\/jlmmarine.com\/ru\/products\/838929-zinc-pencil-anode-for-volvo-penta-d19-d21-d27-d29-d30-d31-d32-d40-d41-d42-2001-2002-2003-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}