{"product_id":"865982077-exhaust-riser-screw-for-mercury-mercruiser-357-383-4-3l-5-0l-5-7l-6-2l-jlm-marine","title":"865982077 Exhaust Riser Screw for Mercury Mercruiser 357 383 4.3L 5.0L 5.7L 6.2L | JLM Marine","description":"\u003ch2\u003e865982077 Exhaust Riser Screw for Mercury Mercruiser 357 383 4.3L 5.0L 5.7L 6.2L\u003c\/h2\u003e\n\n\u003cp\u003eThis exhaust riser screw is engineered for \u003cstrong\u003eMercury Mercruiser\u003c\/strong\u003e sterndrive and inboard applications, including \u003cstrong\u003e357, 383, 4.3L, 5.0L, 5.7L, and 6.2L\u003c\/strong\u003e engines with Alpha and Bravo drive configurations. Designed to secure exhaust risers reliably, this fastener meets the demanding conditions of marine environments.\u003c\/p\u003e\n\n\u003cp\u003eThis screw directly replaces Mercury Mercruiser OEM part numbers \u003cstrong\u003e10-865982077\u003c\/strong\u003e and \u003cstrong\u003e865982077\u003c\/strong\u003e, ensuring compatibility across a wide range of performance and standard models.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eThread specification: \u003cstrong\u003e.375 - 16 X 10.500\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuitable for both Alpha and Bravo sterndrive systems as well as inboard configurations\u003c\/li\u003e\n\u003cli\u003ePrecision-manufactured for secure exhaust riser mounting\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\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\u003eMercury Mercruiser\u003c\/td\u003e\n\u003ctd\u003e10-865982077\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mercruiser\u003c\/td\u003e\n\u003ctd\u003e865982077\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\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\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003e350 MAG MPI HORIZON ALPHA\/BRAVO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e357 Alpha 4V\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e357 Mag Bravo 4V\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e377 MAG MPI BRAVO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e383 Mag Inboard 4V\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e383 MAG STROKER\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e383 MAG STROKER BRAVO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e383 MAG STROKER INBOARD\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e383 Mag Bravo 4V\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e385 Performance Tuned\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e4.3L MPI ALPHA\/BRAVO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e4.3L CARB ALPHA\/BRAVO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e5.0L MPI ALPHA\/BRAVO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e5.0L CARB ALPHA\/BRAVO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e5.7L CARB ALPHA\/BRAVO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e5.7L MPI HORIZON MIE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e5.7L MPI MIE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e6.2L MPI HORIZON MIE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e6.2L MPI MIE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMX 6.2L MPI HORIZON MIE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMX 6.2L MPI MIE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMX 6.2L MPI BRAVO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMX 6.2L MPI HORIZON BRAVO\u003c\/td\u003e\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\u003eThread Size\u003c\/td\u003e\n\u003ctd\u003e.375 - 16 X 10.500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eExhaust Riser Mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Drive Systems\u003c\/td\u003e\n\u003ctd\u003eAlpha, Bravo, Inboard\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\u003cspan style=\"color:red;\"\u003e1 X Screw\u003c\/span\u003e\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 ignition is off before beginning work.\u003c\/li\u003e\n\u003cli\u003eRemove the old or damaged exhaust riser screw carefully to avoid cross-threading the mounting hole.\u003c\/li\u003e\n\u003cli\u003eInspect the threaded hole in the exhaust manifold or riser flange for debris, corrosion, or damage.\u003c\/li\u003e\n\u003cli\u003eClean the threads thoroughly using a wire brush and apply anti-seize compound to prevent future corrosion.\u003c\/li\u003e\n\u003cli\u003eAlign the new screw with the mounting hole and hand-thread it several turns to confirm proper engagement.\u003c\/li\u003e\n\u003cli\u003eTighten the screw to the manufacturer's specified torque using a calibrated torque wrench.\u003c\/li\u003e\n\u003cli\u003eDouble-check alignment and secure fitment of the exhaust riser assembly.\u003c\/li\u003e\n\u003cli\u003ePerform a visual inspection after installation and re-torque fasteners after the first engine run if recommended.\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 confirm this screw fits my Mercury Mercruiser engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your engine model with the compatibility table above. If your engine is a 357, 383, 4.3L, 5.0L, 5.7L, or 6.2L with Alpha or Bravo drive, and uses OEM part number 865982077 or 10-865982077, this screw will fit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the correct torque specification for this exhaust riser screw?\u003c\/strong\u003e\u003cbr\u003e\nA: Refer to your Mercury Mercruiser service manual for the exact torque value for your engine model. Over-tightening can strip threads, while under-tightening may cause exhaust leaks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Should I use anti-seize compound during installation?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, applying marine-grade anti-seize compound to the threads is highly recommended to prevent corrosion and facilitate future removal in saltwater and freshwater environments.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I inspect or replace exhaust riser screws?\u003c\/strong\u003e\u003cbr\u003e\nA: Inspect exhaust riser fasteners annually or during routine manifold\/riser replacement. Replace any screws showing corrosion, thread damage, or that fail to torque properly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM or aftermarket part?\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":51981041107257,"sku":"24SW050","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_61e0314e-5043-4a1c-801f-7f041519dd67.jpg?v=1772414885","url":"https:\/\/jlmmarine.com\/products\/865982077-exhaust-riser-screw-for-mercury-mercruiser-357-383-4-3l-5-0l-5-7l-6-2l-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}