{"product_id":"87-814281a5-shift-interrupter-micro-switch-for-mercruiser-3-0l-4-3l-5-0l-5-7l-jlm-marine","title":"87-814281A5 Shift Interrupter Micro Switch for Mercruiser 3.0L 4.3L 5.0L 5.7L | JLM Marine","description":"\u003ch2\u003eShift Interrupter Micro Switch for MerCruiser 3.0L, 4.3L, 5.0L, 5.7L Engines – 87-814281A5\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eShift Interrupter Micro Switch\u003c\/strong\u003e is designed as a direct replacement for MerCruiser sterndrive engines ranging from \u003cstrong\u003e3.0L to 5.7L\u003c\/strong\u003e. It ensures proper shift plate interruption functionality across multiple Alpha and Bravo drive configurations, including GEN+ models from the mid-1990s through early 2000s.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket switch directly replaces OEM part numbers \u003cstrong\u003e87-814281A5\u003c\/strong\u003e and \u003cstrong\u003e814281A5\u003c\/strong\u003e, offering reliable performance for a wide range of MerCruiser V-6 and V-8 engines equipped with 2-barrel and 4-barrel carburetor systems.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with MerCruiser Alpha One, Alpha 4V, and Bravo sterndrive systems\u003c\/li\u003e\n  \u003cli\u003eFits 3.0L I\/L4, 4.3L V-6, 5.0L V-8, and 5.7L V-8 engines\u003c\/li\u003e\n  \u003cli\u003eDirect bolt-on replacement for OEM shift plate micro switch assembly\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\u003eMerCruiser\u003c\/td\u003e\n      \u003ctd\u003e87-814281A5\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMerCruiser\u003c\/td\u003e\n      \u003ctd\u003e814281A5\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\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eEngine\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e3.0L ALPHA ONE\u003c\/td\u003e\n        \u003ctd\u003e3.0L GM 181 I\/L4\u003c\/td\u003e\n        \u003ctd\u003e—\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e3.0L\/LX ALPHA ONE\u003c\/td\u003e\n        \u003ctd\u003e3.0LX GM 181 I\/L4\u003c\/td\u003e\n        \u003ctd\u003e1996-1997\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e3.0L\/LX ALPHA ONE\u003c\/td\u003e\n        \u003ctd\u003e3.0L GM 181 I\/L4\u003c\/td\u003e\n        \u003ctd\u003e1998\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e4.3L CARB ALPHA\/BRAVO\u003c\/td\u003e\n        \u003ctd\u003e4.3L CARB ALPHA\/BRAVO\u003c\/td\u003e\n        \u003ctd\u003e—\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e4.3L ALPHA 4V\u003c\/td\u003e\n        \u003ctd\u003e4.3L (GEN +) (4BBL) Reman\u003c\/td\u003e\n        \u003ctd\u003e—\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e4.3 LX\/LXH ALPHA AND BRAVO (GEN +)\u003c\/td\u003e\n        \u003ctd\u003e4.3LX (GEN +) (2 BBL.) GM 262 V-6\u003c\/td\u003e\n        \u003ctd\u003e1996-1997\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e4.3L ALPHA\/BRAVO (262 CID - GEN +)\u003c\/td\u003e\n        \u003ctd\u003e4.3LH (GEN +) (4 BBL.) GM 262 V-6\u003c\/td\u003e\n        \u003ctd\u003e1998\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.0L\/5.7L ALPHA\/BRAVO GEN+\u003c\/td\u003e\n        \u003ctd\u003e5.7L (2 BBL.) GM 350 V-8\u003c\/td\u003e\n        \u003ctd\u003e1998-2001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.0L \/ 5.7L STERNDRIVE\u003c\/td\u003e\n        \u003ctd\u003e5.7L CARB ALPHA\/BRAVO\u003c\/td\u003e\n        \u003ctd\u003e—\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.0L\/5.7L ALPHA\/BRAVO GEN+\u003c\/td\u003e\n        \u003ctd\u003e5.0L (2 BBL.) GM 305 V-8\u003c\/td\u003e\n        \u003ctd\u003e1998-2001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.7L 2BBL 5.7LX 4BBL 350 MAG ALPHA\/BRAVO\u003c\/td\u003e\n        \u003ctd\u003e350 MAG. ALPHA (4 BBL.) GM 350 V-8\u003c\/td\u003e\n        \u003ctd\u003e1997\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.7L 2BBL 5.7LX 4BBL 350 MAG ALPHA\/BRAVO\u003c\/td\u003e\n        \u003ctd\u003e5.7L (2 BBL.) GM 350 V-8\u003c\/td\u003e\n        \u003ctd\u003e1997\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eYour purchase includes:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Shift Interrupter Micro Switch Assembly\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\u003eDisconnect the battery and ensure the engine is off and cool before beginning work.\u003c\/li\u003e\n  \u003cli\u003eLocate the shift plate assembly on your MerCruiser sterndrive unit.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the wiring harness from the old micro switch by carefully unplugging the connector.\u003c\/li\u003e\n  \u003cli\u003eRemove the mounting screws securing the old switch to the shift plate.\u003c\/li\u003e\n  \u003cli\u003eLift the old switch away from the assembly and inspect the mounting surface for debris or corrosion.\u003c\/li\u003e\n  \u003cli\u003ePosition the new shift interrupter micro switch onto the mounting surface, aligning the screw holes.\u003c\/li\u003e\n  \u003cli\u003eInstall and tighten the mounting screws securely, but do not overtighten to avoid damaging the switch housing.\u003c\/li\u003e\n  \u003cli\u003eReconnect the wiring harness connector to the new switch, ensuring a firm click or secure fit.\u003c\/li\u003e\n  \u003cli\u003eVerify that the switch lever or actuator properly contacts the shift mechanism when engaged.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and test the shift function in both forward and reverse to confirm proper interruption.\u003c\/li\u003e\n  \u003cli\u003eCheck for any error codes or warning lights on the dash after installation.\u003c\/li\u003e\n  \u003cli\u003eIf the engine fails to start or shift properly, recheck all connections and switch alignment before operating.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I confirm this micro switch fits my MerCruiser engine?\u003c\/strong\u003e\u003cbr\u003e\nCheck the compatible engine models table above for your specific engine displacement (3.0L, 4.3L, 5.0L, or 5.7L) and year range. Verify that your sterndrive is an Alpha One, Alpha 4V, or Bravo configuration, and cross-reference your current OEM part number (87-814281A5 or 814281A5).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are the signs that my shift interrupter switch is failing?\u003c\/strong\u003e\u003cbr\u003e\nCommon symptoms include the engine failing to start when the shift lever is in neutral, difficulty shifting into gear, or the engine starting in gear (a serious safety hazard). You may also experience intermittent starting issues or warning lights related to the shift system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow often should I replace the shift interrupter micro switch?\u003c\/strong\u003e\u003cbr\u003e\nThis switch does not have a fixed replacement interval and should be replaced only when it fails or exhibits signs of malfunction. Regular inspection during annual maintenance is recommended, especially if you notice erratic shifting or starting behavior.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I install this switch myself, or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nInstallation is straightforward for those with basic mechanical skills and tools. However, because this switch is a critical safety component that prevents the engine from starting in gear, professional installation is recommended if you are unfamiliar with sterndrive electrical systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between this aftermarket switch and the OEM part?\u003c\/strong\u003e\u003cbr\u003e\nThis 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\u003eHow fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nWe 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\u003eWhat is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nThis 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":51981005259065,"sku":"23SH367","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_a838f38c-d78e-4798-8e71-cdbf81c7646b.jpg?v=1772414382","url":"https:\/\/jlmmarine.com\/products\/87-814281a5-shift-interrupter-micro-switch-for-mercruiser-3-0l-4-3l-5-0l-5-7l-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}