{"product_id":"sierra-18-0965-adapter-outer-powerhead-gasket-replaces-omc-333879-fits-evinrude-johnson-outboards","title":"Sierra 18-0965 Adapter Outer Powerhead Gasket, Replaces 331598, Evinrude Outboard","description":"\u003cp\u003eThe Sierra 18-0965 is an Adapter Outer Powerhead Gasket engineered as a direct replacement for Evinrude outboard powerheads. This gasket seals the adapter-to-powerhead joint, helping maintain proper compression and preventing leaks at this critical connection point. Built to meet or exceed original equipment quality standards, it is designed as a drop-in replacement for the OEM number it references, making it a straightforward choice when servicing or rebuilding an Evinrude outboard powerhead. The gasket is finished in white and is supplied one per package, matching the original equipment quantity for this application. Because gaskets are wear items that lose their sealing ability over time from heat cycling and compression set, replacing the adapter outer powerhead gasket during any powerhead service or teardown helps restore a proper seal and reduce the risk of leaks or lost compression after reassembly. At 0.3 pounds, it ships and installs easily alongside other gasket set components during a routine powerhead rebuild.\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 18-0965\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Adapter Outer Powerhead Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Evinrude Outboard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity per Package:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999752048\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eEvinrude outboard powerheads\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e331598\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0965 used for?\u003c\/strong\u003e It is an Adapter Outer Powerhead Gasket that seals the adapter-to-powerhead joint on Evinrude outboard powerheads, part number 18-0965.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0965 gasket fit Evinrude outboards?\u003c\/strong\u003e Yes, the Sierra 18-0965 Adapter Outer Powerhead Gasket is built for Evinrude outboard powerhead applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the Sierra 18-0965 replace?\u003c\/strong\u003e The 18-0965 replaces OEM number 331598.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0965 gasket weigh?\u003c\/strong\u003e The Adapter Outer Powerhead Gasket 18-0965 weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-0965 gasket?\u003c\/strong\u003e The 18-0965 Adapter Outer Powerhead Gasket is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package of the 18-0965?\u003c\/strong\u003e One gasket is included per package for part number 18-0965.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0965 genuine OEM or aftermarket?\u003c\/strong\u003e The 18-0965 is an aftermarket Sierra part manufactured to meet or exceed the quality of the original equipment gasket it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the adapter outer powerhead gasket?\u003c\/strong\u003e Replace the 18-0965 gasket any time the powerhead is disassembled for service, since gaskets should not be reused once a joint has been broken.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the Sierra 18-0965 seal properly against the original equipment part?\u003c\/strong\u003e Yes, the 18-0965 is designed as a direct-fit replacement for OEM number 331598 and is built to seal the same adapter-to-powerhead joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the Sierra 18-0965?\u003c\/strong\u003e Ordering the 18-0965 includes the Adapter Outer Powerhead Gasket itself, one per package.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086632667,"sku":"SIE-18-0965","price":25.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0965_lg__43081.1558119798.500.750.jpg?v=1785188751","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0965-adapter-outer-powerhead-gasket-replaces-omc-333879-fits-evinrude-johnson-outboards","provider":"Good Vibes Marina","version":"1.0","type":"link"}