{"product_id":"8m0011987-camshaft-position-sensor-for-mercury-mariner-verado-jlm-marine","title":"8M0011987 Camshaft Position Sensor for Mercury Mariner Verado | JLM Marine","description":"\u003ch2\u003e8M0011987 Camshaft Position Sensor for Mercury Mariner Verado Outboards\u003c\/h2\u003e\n\n\u003cp\u003eThis camshaft position sensor is engineered to fit \u003cstrong\u003eMercury Verado\u003c\/strong\u003e and \u003cstrong\u003eMariner\u003c\/strong\u003e outboard engines from 135HP to 400HP, as well as \u003cstrong\u003eMerCruiser Sterndrive Gas Engines 9.0L 552 CID V8\u003c\/strong\u003e. It ensures precise camshaft timing detection for optimal engine performance and reliable ignition control across a wide range of high-performance marine applications.\u003c\/p\u003e\n\n\u003cp\u003eThis sensor directly replaces OEM part numbers \u003cstrong\u003e880609\u003c\/strong\u003e and \u003cstrong\u003e8M0011987\u003c\/strong\u003e, providing a reliable aftermarket solution for maintaining your engine's camshaft position monitoring system.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eDirect replacement for Mercury Mariner part numbers 880609 and 8M0011987\u003c\/li\u003e\n\u003cli\u003eCompatible with Mercury Verado, Mariner outboards (135HP–400HP), and MerCruiser 9.0L V8 sterndrives\u003c\/li\u003e\n\u003cli\u003eEnsures accurate camshaft timing detection for optimal engine performance\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\" style=\"border-collapse:collapse; width:100%;\"\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 Mariner\u003c\/td\u003e\n\u003ctd\u003e880609\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e8M0011987\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\" style=\"border-collapse:collapse; width:100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Verado\u003c\/td\u003e\n\u003ctd\u003eOutboards\u003c\/td\u003e\n\u003ctd\u003e135HP 150HP 175HP 225HP 250HP 275HP 300HP 350HP 400HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003eOutboards\u003c\/td\u003e\n\u003ctd\u003e135HP 150HP 175HP 225HP 250HP 275HP 300HP 350HP 400HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003eSterndrive Gas Engines 9.0L 552 CID V8\u003c\/td\u003e\n\u003ctd\u003eN\/A\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\" style=\"border-collapse:collapse; width:100%;\"\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\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e8M0011987, 880609\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCamshaft Position Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eMercury Verado, Mariner Outboards, MerCruiser Sterndrive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Engine Range\u003c\/td\u003e\n\u003ctd\u003e135HP – 400HP Outboards; 9.0L V8 Sterndrive\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\u003cp\u003eYour package includes:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1× Camshaft Position Sensor\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisconnect the battery:\u003c\/strong\u003e Always disconnect the negative battery terminal before beginning any electrical work to prevent accidental shorts or injury.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocate the camshaft position sensor:\u003c\/strong\u003e Consult your engine's service manual or parts diagram to identify the exact location of the sensor on your specific model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisconnect the electrical connector:\u003c\/strong\u003e Carefully unplug the wiring harness connector from the old sensor. Press any locking tabs if present.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove the mounting hardware:\u003c\/strong\u003e Unscrew the bolt(s) securing the sensor to the engine block or cylinder head using the appropriate socket or wrench.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtract the old sensor:\u003c\/strong\u003e Gently pull the sensor out of its housing. Note the orientation and any O-rings or seals that may need replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect the mounting surface:\u003c\/strong\u003e Clean any debris, oil residue, or old gasket material from the sensor mounting area to ensure a proper seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the new sensor:\u003c\/strong\u003e Insert the new camshaft position sensor into the mounting hole, ensuring correct alignment and orientation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure the sensor:\u003c\/strong\u003e Hand-tighten the mounting bolt(s) first, then torque to manufacturer specifications (typically 8–12 Nm \/ 71–106 in-lbs, but verify in your service manual).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReconnect the electrical connector:\u003c\/strong\u003e Plug the wiring harness connector firmly onto the new sensor until you hear or feel it click into place.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReconnect the battery:\u003c\/strong\u003e Reattach the negative battery terminal and ensure all connections are secure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear any diagnostic codes:\u003c\/strong\u003e Use a marine diagnostic tool to clear any stored fault codes related to the camshaft position sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest the engine:\u003c\/strong\u003e Start the engine and verify smooth operation, checking for warning lights or fault codes. Confirm proper idle and throttle response.\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 camshaft position sensor fits my engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your original part number (880609 or 8M0011987) with our compatibility table. Verify your engine model, horsepower, and year against the fitment chart above. If you're unsure, consult your engine's parts diagram or contact our support team with your engine serial number.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs of a failing camshaft position sensor?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include rough idling, engine stalling, difficulty starting, misfires, reduced power, hesitation during acceleration, and illuminated warning lights or fault codes (often related to ignition timing or sensor circuit faults).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the camshaft position sensor?\u003c\/strong\u003e\u003cbr\u003e\nA: Camshaft position sensors typically do not have a scheduled replacement interval; they should be replaced when they fail or show signs of malfunction. Regular diagnostic scans and monitoring engine performance can help detect sensor issues early.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this sensor on both Verado and standard Mariner outboards?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, this sensor is designed to fit Mercury Verado and Mariner outboards from 135HP to 400HP, as well as MerCruiser 9.0L V8 sterndrive engines. Always verify compatibility with your specific engine model and serial number before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will installation of this sensor require recalibration or programming?\u003c\/strong\u003e\u003cbr\u003e\nA: In most cases, no special programming is required. After installation, clear any stored fault codes with a diagnostic tool and allow the ECU to relearn sensor parameters during normal operation. Consult your service manual for model-specific procedures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM part or an aftermarket replacement?\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":51981004734777,"sku":"23PS385","price":62.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_ba7b40dd-4ae3-499c-bf90-b3838bc31253.jpg?v=1772414367","url":"https:\/\/jlmmarine.com\/products\/8m0011987-camshaft-position-sensor-for-mercury-mariner-verado-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}