{"product_id":"neutral-switch-shift-8m0052939-fit-mercury-cmd-qsd-4-2-es-270-320-350-jp-3-0l","title":"Neutral Switch Shift 8M0052939 Fit Mercury CMD QSD 4.2 ES 270 320 350, JP (3.0L)","description":"\u003ch2\u003eNeutral Switch Shift for Mercury CMD QSD\u003c\/h2\u003e\u003cp\u003eThis is a replacement neutral switch shift assembly, designed for Mercury CMD QSD engines, including the 4.2 ES series and JP (3.0L) models, rated at 270, 320, and 350 horsepower. This component matches OEM cross-reference 8M0052939 and ensures the engine only starts in neutral for safe shift operation. It is a direct service part for maintaining proper starter lockout in these marine diesel engines.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis neutral switch shift is an electrical safety device that prevents the engine from starting unless the transmission is in neutral. Engineered for Mercury CMD QSD platforms, including the 4.2 ES and JP (3.0L) base engines, this neutral switch shift provides a reliable replacement for a worn original. This part is a direct equivalent to the OEM 8M0052939 neutral switch shift, ensuring seamless integration.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement for OEM part number 8M0052939\u003c\/li\u003e\n\u003cli\u003eDesigned to meet marine industry standards for durability and reliability\u003c\/li\u003e\n\u003cli\u003eSealed housing protects electrical contacts from moisture and salt spray\u003c\/li\u003e\n\u003cli\u003eMeets original performance specifications for shift interlock\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple engine variants within the CMD QSD family\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Mercury CMD QSD 4.2 ES 270 models\u003c\/li\u003e\n\u003cli\u003efor Mercury CMD QSD 4.2 ES 320 models\u003c\/li\u003e\n\u003cli\u003efor Mercury CMD QSD 4.2 ES 350 models\u003c\/li\u003e\n\u003cli\u003efor Mercury CMD QSD JP (3.0L) models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReplacing a defective neutral safety switch during engine service intervals\u003c\/li\u003e\n\u003cli\u003eEnsuring safe startup when docking or maneuvering in tight spaces\u003c\/li\u003e\n\u003cli\u003eUsed by marine technicians as a standard replacement part for CMD QSD engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8M0052939\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNeutral Switch Shift\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCMD QSD 4.2 ES, JP (3.0L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Ratings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e270, 320, 350 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this switch identical to the original 8M0052939? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this item is a direct replacement for the original part number 8M0052939, with the same electrical and mechanical specifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I install this myself? \u003cstrong\u003eA:\u003c\/strong\u003e Installation is straightforward if you have basic mechanical skills, but always disconnect the battery and refer to your engine's service manual for the correct procedure.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Part Outfitters","offers":[{"title":"Default Title","offer_id":46610556387514,"sku":"ZZ3F09048","price":101.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/2476\/1786\/files\/s-l1600_760e9eb0-3d06-47e6-9c23-ce71a864f37f.jpg?v=1789000901","url":"https:\/\/partoutfitters.com\/products\/neutral-switch-shift-8m0052939-fit-mercury-cmd-qsd-4-2-es-270-320-350-jp-3-0l","provider":"Part Outfitters","version":"1.0","type":"link"}