{"product_id":"head-decarbonizing-gasket-kit-fits-volvo-penta-md7a-md7b-replaces-876431-875613","title":"Head Decarbonizing Gasket Kit – Fits Volvo Penta MD7A MD7B (Replaces 876431, 875613)","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eHead Decarbonizing Gasket Kit\u003c\/strong\u003e is designed for Volvo Penta MD7A and MD7B marine engine models, starting from serial number 35145. This aftermarket replacement provides all necessary gaskets to perform head decarbon service, ensuring proper sealing and engine performance during routine maintenance.\u003c\/p\u003e\n\u003cp\u003eThis kit directly replaces Volvo Penta part numbers 876431, 875613, and 876430, as well as Crom Marine 121047 and 121046, and Orbitrade 21431 and 21430.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete gasket set for head decarbonizing service\u003c\/li\u003e\n  \u003cli\u003eCompatible with Volvo Penta MD7A and MD7B engines\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement built to OEM specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\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\u003e876431\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e875613\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e876430\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCrom Marine\u003c\/td\u003e\n        \u003ctd\u003e121047\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCrom Marine\u003c\/td\u003e\n        \u003ctd\u003e121046\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOrbitrade\u003c\/td\u003e\n        \u003ctd\u003e21431\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOrbitrade\u003c\/td\u003e\n        \u003ctd\u003e21430\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\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\u003eMD7A\u003c\/td\u003e\n        \u003ctd\u003eS\/N: 35145 and up\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003eMD7B\u003c\/td\u003e\n        \u003ctd\u003eS\/N: 35145 and up\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eHead Decarbonizing Service\u003c\/dd\u003e\n  \u003cdt\u003eEngine Family\u003c\/dt\u003e\n  \u003cdd\u003eVolvo Penta MD7 Series\u003c\/dd\u003e\n  \u003cdt\u003eCompatible Models\u003c\/dt\u003e\n  \u003cdd\u003eMD7A, MD7B\u003c\/dd\u003e\n  \u003cdt\u003eSerial Number Range\u003c\/dt\u003e\n  \u003cdd\u003e35145 and above\u003c\/dd\u003e\n  \u003cdt\u003eOEM Reference\u003c\/dt\u003e\n  \u003cdd\u003e876431, 875613\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003e1 × Head Decarb Decarbonizing Gasket Kit\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure engine is completely cool and disconnect battery before starting work.\u003c\/li\u003e\n  \u003cli\u003eRemove cylinder head according to manufacturer service manual procedures.\u003c\/li\u003e\n  \u003cli\u003eClean all mating surfaces thoroughly, removing carbon deposits and old gasket material.\u003c\/li\u003e\n  \u003cli\u003eInspect cylinder head and block for warping, cracks, or damage before reassembly.\u003c\/li\u003e\n  \u003cli\u003eInstall new gaskets from this kit in the correct orientation per service manual.\u003c\/li\u003e\n  \u003cli\u003eTorque cylinder head bolts to manufacturer specifications in the proper sequence.\u003c\/li\u003e\n  \u003cli\u003eAllow adequate cure time if sealant is used before starting the engine.\u003c\/li\u003e\n  \u003cli\u003eCheck for leaks and proper operation after installation and initial run-in.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhich Volvo Penta MD7 engines does this kit fit?\u003c\/summary\u003e\n  \u003cp\u003eThis gasket kit fits Volvo Penta MD7A and MD7B marine engines with serial numbers 35145 and above. Verify your engine serial number before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is included in this decarbonizing kit?\u003c\/summary\u003e\n  \u003cp\u003eThe kit includes all necessary gaskets required for head decarbonizing service on MD7A and MD7B engines. Compare contents with your service manual to confirm completeness for your specific procedure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should I perform head decarbonizing service?\u003c\/summary\u003e\n  \u003cp\u003eDecarbonizing intervals depend on engine hours, fuel quality, and operating conditions. Consult your Volvo Penta service manual for recommended maintenance schedules. Signs that service is needed include loss of power, rough idle, or excessive smoke.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I reuse the old gaskets?\u003c\/summary\u003e\n  \u003cp\u003eNo, gaskets are designed for single use. Reusing old gaskets can result in leaks, improper sealing, and engine damage. Always replace gaskets when performing head service.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need sealant with these gaskets?\u003c\/summary\u003e\n  \u003cp\u003eFollow your engine's service manual recommendations. Some gaskets require sealant while others are installed dry. Using sealant incorrectly can cause leaks or gasket failure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat torque specifications should I use for reassembly?\u003c\/summary\u003e\n  \u003cp\u003eAlways follow the torque values and tightening sequence specified in the Volvo Penta service manual for your engine model. Incorrect torque can lead to leaks or head gasket failure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003eManufacturer-Direct Value — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":51025805803835,"sku":"23GK325","price":58.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/12_fe38977a-38b3-4d97-964a-39cf3ec30ea3.jpg?v=1772959268","url":"https:\/\/seasierra.com\/products\/head-decarbonizing-gasket-kit-fits-volvo-penta-md7a-md7b-replaces-876431-875613","provider":"SeaSierra","version":"1.0","type":"link"}