{"product_id":"sierra-oil-drain-screw-1236-47-1236","title":"Sierra Oil Drain Screw – 1236 (47-1236)","description":"\u003csection class=\"product-description\"\u003e\n\n\u003ch2\u003eSierra Oil Drain Screw – Part No. 1236 (SKU: 47-1236)\u003c\/h2\u003e\n\n\u003cp\u003eThe Sierra 1236 Oil Drain Screw is an OEM-quality replacement drain screw for lower unit and gearcase oil service on Cobra-style sterndrive and compatible outboard applications. Designed to restore a secure, leak-free drain point during scheduled gearcase oil changes.\u003c\/p\u003e\n\n\u003ch2\u003ePart Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 47-1236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Gearcase Service Hardware\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Lower Unit \/ Gearcase Lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOMC Cobra sterndrive lower units requiring a drain screw replacement\u003c\/li\u003e\n\u003cli\u003eCompatible outboard gearcases using the same drain screw spec — verify thread pitch and head style against your existing screw before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eService Interval\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eReplace or inspect at every gearcase oil change (typically every 100 hours or annually, per your engine manufacturer's schedule)\u003c\/li\u003e\n\u003cli\u003eReplace immediately if screw shows stripped threads, corrosion, or a damaged seating surface\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAlways replace the drain screw gasket or O-ring (if used in your application) at the same time as the screw — reusing a worn seal is a leading cause of gearcase oil leaks at the drain point\u003c\/li\u003e\n\u003cli\u003eTorque to manufacturer specification — overtightening will strip aluminum gearcase threads\u003c\/li\u003e\n\u003cli\u003eConfirm thread pitch and head style match your existing screw before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest Use:\u003c\/strong\u003e This screw is the go-to replacement when a drain screw is stripped, corroded, or leaking at the seat. Most commonly used during gearcase oil service on Cobra-style drives.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Issues:\u003c\/strong\u003e Customers frequently order this screw without replacing the mating gasket — a copper or fiber sealing washer that is often the actual source of a slow drip at the drain point. We recommend ordering \u003ca href=\"https:\/\/marisolmarine.com\/products\/sierra-oil-drain-screw-gasket-47-4698\"\u003eSierra Oil Drain Screw Gasket 47-4698\u003c\/a\u003e at the same time to complete the service correctly.\u003c\/p\u003e\n\n\u003ch2\u003eRelated Parts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/sierra-oil-drain-screw-gasket-47-4698\"\u003eSierra Oil Drain Screw Gasket – 47-4698\u003c\/a\u003e — Matching drain screw sealing gasket; replace with every oil change\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51037541040164,"sku":"47-1236","price":19.79,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-1236.jpg?v=1783568588","url":"https:\/\/marisolmarine.com\/products\/sierra-oil-drain-screw-1236-47-1236","provider":"Marisol Marine Company","version":"1.0","type":"link"}