{"product_id":"325974-303879-upper-motor-mount-for-johnson-evinrude-omc-jlm-marine","title":"325974 303879 Upper Motor Mount for Johnson Evinrude OMC | JLM Marine","description":"\u003ch2\u003eUpper Motor Mount for Johnson Evinrude OMC Outboards – 20 25 30 35 HP\u003c\/h2\u003e\n\n\u003cp\u003eThis premium aftermarket upper motor mount is engineered to fit Johnson Evinrude OMC outboard engines ranging from 18 to 35 HP. Designed to absorb vibration and securely support your motor, this rubber mount ensures smooth operation and extended engine life across multiple model years from the 1970s through the 1990s.\u003c\/p\u003e\n\n\u003cp\u003eThis part directly replaces OEM part numbers \u003cstrong\u003e325974\u003c\/strong\u003e, \u003cstrong\u003e303879\u003c\/strong\u003e, and \u003cstrong\u003e778211\u003c\/strong\u003e, providing a reliable solution for restoring proper motor mounting and reducing wear on your outboard components.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eDurable rubber construction designed to withstand marine environments\u003c\/li\u003e\n\u003cli\u003eDirect replacement for multiple OEM part numbers\u003c\/li\u003e\n\u003cli\u003eEssential component for vibration dampening and motor stability\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\u003eJohnson Evinrude OMC\u003c\/td\u003e\n\u003ctd\u003e325974\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson Evinrude OMC\u003c\/td\u003e\n\u003ctd\u003e303879\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson Evinrude OMC\u003c\/td\u003e\n\u003ctd\u003e778211\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 Johnson\/Evinrude owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/johnson-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eJohnson\/Evinrude Serial Number Guide\u003c\/a\u003e.\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\u003eRated HP\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\u003eJohnson Evinrude\u003c\/td\u003e\n\u003ctd\u003e18 HP\u003c\/td\u003e\n\u003ctd\u003e1971-1973\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson Evinrude\u003c\/td\u003e\n\u003ctd\u003e20 HP\u003c\/td\u003e\n\u003ctd\u003e1986, 1988, 1989, 1991, 1992, 1996\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson Evinrude\u003c\/td\u003e\n\u003ctd\u003e25 HP\u003c\/td\u003e\n\u003ctd\u003e1971-1976, 1979-1983\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson Evinrude\u003c\/td\u003e\n\u003ctd\u003e35 HP\u003c\/td\u003e\n\u003ctd\u003e1976, 1979-1983\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eUpper Motor Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eRubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Numbers Replaced\u003c\/td\u003e\n\u003ctd\u003e325974, 303879, 778211\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eJohnson Evinrude OMC 18-35 HP Outboards\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 order includes:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Rubber Upper Motor Mount (OEM 325974)\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\u003eSupport the engine using an appropriate hoist or lifting device to relieve tension on the motor mounts.\u003c\/li\u003e\n\u003cli\u003eLocate the upper motor mount on your Johnson Evinrude outboard; it is typically positioned between the motor and the mounting bracket.\u003c\/li\u003e\n\u003cli\u003eRemove the fasteners (bolts or nuts) securing the old upper motor mount. Keep hardware if reusable.\u003c\/li\u003e\n\u003cli\u003eCarefully extract the worn or damaged rubber mount from its position.\u003c\/li\u003e\n\u003cli\u003eInspect the mounting surfaces for corrosion, damage, or debris and clean as necessary.\u003c\/li\u003e\n\u003cli\u003ePosition the new upper motor mount in the same orientation as the original.\u003c\/li\u003e\n\u003cli\u003eInsert and hand-tighten the mounting fasteners to hold the mount in place.\u003c\/li\u003e\n\u003cli\u003eTorque the fasteners to the manufacturer's specifications using a calibrated torque wrench.\u003c\/li\u003e\n\u003cli\u003eGently lower the engine back into position and remove the lifting device.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery and start the engine to check for proper alignment and vibration reduction.\u003c\/li\u003e\n\u003cli\u003eInspect all connections after the first few hours of operation to ensure everything remains secure.\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 upper motor mount fits my engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your engine's HP and model year with the compatibility table above. Additionally, verify that your original mount matches OEM part numbers 325974, 303879, or 778211.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my motor mount needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include excessive engine vibration, unusual noise during operation, visible cracks or deterioration in the rubber, and misalignment of the motor on the transom.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my motor mounts?\u003c\/strong\u003e\u003cbr\u003e\nA: Motor mounts should be inspected annually and typically replaced every 3–5 years depending on usage and environmental conditions. Replace immediately if cracking, hardening, or separation of the rubber is observed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this mount myself or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nA: If you have basic mechanical skills and the proper tools (including a hoist to support the engine), you can install this mount yourself. However, professional installation is recommended to ensure correct alignment and torque specifications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM part or aftermarket?\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":51981003882809,"sku":"23MM470","price":36.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/s-l1600_5b620405-3836-4b52-92d7-21460c368f68.webp?v=1772414307","url":"https:\/\/jlmmarine.com\/products\/325974-303879-upper-motor-mount-for-johnson-evinrude-omc-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}