{"product_id":"head-gasket-for-nissan-tohatsu-40-50-hp-outboard-replaces-oem-3c8010055m-sierra-18-3850","title":"Sierra Head Gasket 18-3850 for Tohatsu Outboard Internal Engine","description":"\u003cp\u003eThe Sierra 18-3850 Head Gasket is a replacement internal engine component designed for Tohatsu outboard engines. It seals the mating surface between the cylinder head and engine block, maintaining proper compression and preventing coolant or combustion leaks that can lead to overheating or power loss. As part of Sierra's internal engine parts line, this head gasket is built to restore a factory-correct seal during a head gasket replacement or full engine rebuild.\u003c\/p\u003e\u003cp\u003eEach unit ships as a single head gasket (1 item per package), identified by Sierra part number 18-3850 and UPC 808282339449. It is intended for technicians and boat owners servicing Tohatsu outboard powerheads who need a properly fitted gasket rather than a generic cut sheet gasket, helping ensure an accurate seal against the cylinder head bolt pattern and coolant\/combustion passages.\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 18-3850\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Tohatsu Outboard Internal Engine Parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282339449\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.27 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eTohatsu outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-3850 head gasket used for?\u003c\/strong\u003e It seals the joint between the cylinder head and engine block on a Tohatsu outboard engine, maintaining compression and preventing coolant or combustion leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3850 head gasket fit Tohatsu outboards?\u003c\/strong\u003e Yes, the Sierra 18-3850 is categorized as a Tohatsu outboard internal engine part and is designed as a head gasket replacement for these engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets are included with part number 18-3850?\u003c\/strong\u003e One head gasket is included per package of Sierra 18-3850.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3850 head gasket?\u003c\/strong\u003e The UPC for this Sierra head gasket is 808282339449.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3850 head gasket weigh?\u003c\/strong\u003e This head gasket weighs 0.27 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3850 an OEM or aftermarket gasket?\u003c\/strong\u003e Sierra 18-3850 is a Sierra-branded replacement head gasket manufactured for servicing Tohatsu outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace this head gasket?\u003c\/strong\u003e A head gasket like the Sierra 18-3850 is typically replaced when a Tohatsu outboard shows signs of a blown gasket, such as compression loss, coolant leakage, or overheating, or during a full cylinder head or powerhead rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat part number should I order for this Tohatsu head gasket?\u003c\/strong\u003e Order Sierra part number 18-3850 for this Tohatsu outboard head gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-3850 head gasket a DIY job?\u003c\/strong\u003e Installing a head gasket involves removing the cylinder head, so it is generally handled by someone comfortable with outboard engine teardown or a marine technician; the Sierra 18-3850 provides the correctly sized gasket for the job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-3850 come with any additional components?\u003c\/strong\u003e No, the package includes only the head gasket itself as the included component.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988166226139,"sku":"SIE-18-3850","price":46.92,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3850__13306.1558185005.500.750.jpg?v=1785188482","url":"https:\/\/www.goodvibesmarina.com\/products\/head-gasket-for-nissan-tohatsu-40-50-hp-outboard-replaces-oem-3c8010055m-sierra-18-3850","provider":"Good Vibes Marina","version":"1.0","type":"link"}