{"product_id":"shrouded-trim-relay-for-mercury-mariner-outboards-replaces-oem-865202t-807057t-sierra-18-5851","title":"Sierra 18-5851 Shrouded Relay, Replaces 865202T 807057T 807057, Mercury\/Mariner Outboard","description":"\u003cp\u003eThe Sierra 18-5851 is a shrouded relay engineered as a direct replacement for Mercury\/Mariner outboard engine electrical systems. The protective shroud housing shields the internal contacts and terminals from moisture, salt spray, and engine bay debris, helping the relay hold up in the harsh marine environment where unshielded automotive-style relays tend to corrode and fail prematurely. This relay is used in Mercury\/Mariner outboard applications to switch higher-current circuits, such as trim or starting systems, using a lower-current control signal, protecting the primary switch or control wiring from load current.\u003c\/p\u003e\u003cp\u003eSierra manufactures this relay to meet or exceed the performance of the original equipment part it replaces, and it is built to the same form, fit, and function as the OEM units carrying part numbers 865202T, 807057T, and 807057. As a direct cross-reference replacement, installation follows the same mounting and wiring configuration as the original relay, with no modification required. Sierra backs this part with its Industry Leading Customer Satisfaction Warranty, covering defects in workmanship and materials for the useful life of the product.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-5851\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Relay, Shrouded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282292539\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury\/Mariner outboard engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury\/Mariner outboard engine applications\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e865202T\u003c\/li\u003e\n\u003cli\u003e807057T\u003c\/li\u003e\n\u003cli\u003e807057\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5851 relay replace?\u003c\/strong\u003e It replaces Mercury\/Mariner part numbers 865202T, 807057T, and 807057, making the Sierra 18-5851 a direct cross-reference for any of those three OEM numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-5851 a direct OEM replacement or will it need modification?\u003c\/strong\u003e The Sierra 18-5851 shrouded relay is a direct replacement for the Mercury\/Mariner 865202T, 807057T, and 807057 relays, designed to match the original mounting and wiring so no modification is needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-5851 relay fit?\u003c\/strong\u003e This shrouded relay is used on Mercury\/Mariner outboard engine applications that originally used the 865202T, 807057T, or 807057 relay.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5851 relay weigh?\u003c\/strong\u003e The Sierra 18-5851 shrouded relay weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the purpose of the shroud on this relay?\u003c\/strong\u003e The shroud housing on the Sierra 18-5851 covers the relay's internal contacts and terminals, helping protect them from moisture and salt exposure in a marine engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5851 covered by a warranty?\u003c\/strong\u003e Yes, the Sierra 18-5851 relay is covered under Sierra's Industry Leading Customer Satisfaction Warranty, which covers defects in workmanship and materials for the useful life of the product.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-5851?\u003c\/strong\u003e Ordering the Sierra 18-5851 includes one shrouded relay, ready to install in place of the Mercury\/Mariner 865202T, 807057T, or 807057 unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5851 use the same UPC across sellers?\u003c\/strong\u003e The Sierra 18-5851 shrouded relay carries UPC 808282292539, which can be used to confirm you are ordering the correct genuine Sierra part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-5851 relay for non-Mercury applications?\u003c\/strong\u003e The Sierra 18-5851 is specified for Mercury\/Mariner outboard applications that used the 865202T, 807057T, or 807057 relay; compatibility outside those applications is not specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy choose the genuine Sierra 18-5851 over a generic relay?\u003c\/strong\u003e The Sierra 18-5851 is engineered to meet or exceed the original equipment part it replaces and includes Sierra's Customer Satisfaction Warranty, unlike unbranded generic relays without that same coverage.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988327936219,"sku":"SIE-18-5851","price":33.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5851__41835.1558185467.500.750.jpg?v=1785188197","url":"https:\/\/www.goodvibesmarina.com\/products\/shrouded-trim-relay-for-mercury-mariner-outboards-replaces-oem-865202t-807057t-sierra-18-5851","provider":"Good Vibes Marina","version":"1.0","type":"link"}