{"product_id":"sierra-18-3803-head-gasket-for-omc-johnson-evinrude-2-cylinder-outboards-replaces-oem-329419-765012","title":"Sierra Head Gasket 18-3803, Replaces OMC 329419, for 2-Cylinder Outboard Engines","description":"\u003cp\u003eThe Sierra 18-3803 Head Gasket is a replacement gasket designed to seal the cylinder head on 2-cylinder outboard engines. It is built to the OEM cross-reference OMC 329419, making it a direct fit for the power head applications that number covers. The gasket has a round shape and a white finish, and is sized to seat correctly between the cylinder head and the power head to maintain proper compression and prevent coolant or combustion leaks at the head joint.\u003c\/p\u003e\u003cp\u003eThis part is intended for service and rebuild work on 2-cylinder outboard power heads, where the head gasket is a wear item that should be replaced any time the cylinder head is removed for inspection, decarbonizing, or repair. Using the correct gasket for the specific engine helps ensure a proper seal and avoids the compression loss, coolant leaks, or blown-gasket failures that come from reusing an old gasket or fitting an incorrect one.\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 18-3803\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999316547\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e 2-cylinder outboard models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e OMC 329419\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2-cylinder outboard power head models only\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 329419\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-3803 head gasket fit?\u003c\/strong\u003e The Sierra 18-3803 head gasket is for 2-cylinder outboard models only, sealing the cylinder head to the power head on those engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-3803 replace?\u003c\/strong\u003e It replaces OMC 329419, so any engine calling for that OEM number can use the Sierra 18-3803 instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-3803 head gasket?\u003c\/strong\u003e It is white and round in shape, matching the factory head gasket profile it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3803 head gasket weigh?\u003c\/strong\u003e The Sierra 18-3803 head gasket weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3803 an OEM-equivalent part?\u003c\/strong\u003e Yes, it is manufactured to match OMC 329419 as a direct cross-reference replacement for that OEM head gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this gasket work on a 4-cylinder or V-engine outboard?\u003c\/strong\u003e No, the 18-3803 head gasket is designated for 2-cylinder models only and should not be used on 4-cylinder or V-configuration outboard power heads.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace this head gasket?\u003c\/strong\u003e The 18-3803 head gasket should be replaced any time the cylinder head is removed from a 2-cylinder outboard power head for service, since the old gasket should not be reused.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the Sierra 18-3803?\u003c\/strong\u003e You receive one Sierra 18-3803 head gasket, sized for a 2-cylinder outboard power head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-3803 come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-3803 head gasket carries a limited warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3803 gasket round or another shape?\u003c\/strong\u003e It is a round gasket, matching the cylinder head bolt pattern and bore layout of the 2-cylinder power heads it fits.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988166062299,"sku":"SIE-18-3803","price":23.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3803_lg__04934.1558125438.500.750.jpg?v=1785188226","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3803-head-gasket-for-omc-johnson-evinrude-2-cylinder-outboards-replaces-oem-329419-765012","provider":"Good Vibes Marina","version":"1.0","type":"link"}