{"product_id":"sierra-18-1236-omc-cobra-drain-screw","title":"Sierra 18-1236 OMC Cobra Drain Screw 40-50HP 1989-1997 OEM 309243","description":"\u003ch2\u003eSierra 18-1236 OMC Drain Screw\u003c\/h2\u003e\n\n\u003cp\u003eThe Sierra 18-1236 Drain Screw is a replacement lower unit drain screw for select OMC, Johnson, and Evinrude applications. Designed to replace OEM part number 309243, this drain screw fits OMC Sterndrive \/ Cobra drive applications and select 40HP to 50HP outboards from 1989-1997.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSierra replacement OMC drain screw\u003c\/li\u003e\n  \u003cli\u003ePart number: 18-1236\u003c\/li\u003e\n  \u003cli\u003eReplaces OEM part number 309243\u003c\/li\u003e\n  \u003cli\u003eFits select OMC Sterndrive \/ Cobra drive applications\u003c\/li\u003e\n  \u003cli\u003eFits select Johnson \/ Evinrude 40HP to 50HP applications from 1989-1997\u003c\/li\u003e\n  \u003cli\u003eUsed for lower unit \/ gearcase drain plug service\u003c\/li\u003e\n  \u003cli\u003eDesigned for compatible marine drive and outboard gearcase applications\u003c\/li\u003e\n  \u003cli\u003eUseful for replacing worn, missing, damaged, or corroded drain screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment \/ Product Details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 18-1236\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Drain screw \/ drain plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Select OMC Sterndrive \/ Cobra drive and Johnson \/ Evinrude lower unit drain screw applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Types:\u003c\/strong\u003e OMC Sterndrive \/ Cobra drive applications and select Johnson \/ Evinrude outboard gearcase applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHP Range:\u003c\/strong\u003e Select 40HP to 50HP outboard applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eYear Range:\u003c\/strong\u003e 1989-1997 for listed 40HP to 50HP outboard applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Applications:\u003c\/strong\u003e OMC Sterndrive \/ Cobra drives where OEM 309243 is specified\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Replacement Number:\u003c\/strong\u003e 309243\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAssembly Location:\u003c\/strong\u003e Lower unit \/ gearcase drain screw location\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment Note:\u003c\/strong\u003e Match Sierra 18-1236 or OEM 309243 to your drive model, outboard model, horsepower, year range, gearcase diagram, owner’s manual, or service manual before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExpanded Fitment\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOMC Sterndrive \/ Cobra Drives:\u003c\/strong\u003e Select applications where OEM drain screw 309243 is specified\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJohnson \/ Evinrude 40HP Outboards:\u003c\/strong\u003e Select 1989-1997 applications where OEM 309243 is specified\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJohnson \/ Evinrude 50HP Outboards:\u003c\/strong\u003e Select 1989-1997 applications where OEM 309243 is specified\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eV6 OMC \/ Cobra Applications:\u003c\/strong\u003e Select drive applications where Sierra 18-1236 or OEM 309243 is required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy You Should Buy\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrect Sierra replacement drain screw for applications requiring 18-1236\u003c\/li\u003e\n  \u003cli\u003eReplaces OMC OEM part number 309243\u003c\/li\u003e\n  \u003cli\u003eDesigned for compatible OMC Cobra drive and 40HP to 50HP lower unit applications\u003c\/li\u003e\n  \u003cli\u003eUseful during gearcase oil changes, lower unit service, and routine maintenance\u003c\/li\u003e\n  \u003cli\u003eHelps replace worn or damaged drain screws that can affect proper gearcase sealing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOMC Cobra drive drain screw replacement\u003c\/li\u003e\n  \u003cli\u003eOMC Sterndrive gearcase service\u003c\/li\u003e\n  \u003cli\u003eJohnson 40HP to 50HP lower unit drain screw replacement\u003c\/li\u003e\n  \u003cli\u003eEvinrude 40HP to 50HP lower unit service\u003c\/li\u003e\n  \u003cli\u003eGearcase oil drain plug replacement\u003c\/li\u003e\n  \u003cli\u003eApplications requiring Sierra 18-1236 or OEM 309243\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhat is Sierra 18-1236?\u003c\/strong\u003e Sierra 18-1236 is a replacement OMC drain screw for select Cobra drive and 40HP to 50HP outboard applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhat OEM part number does this replace?\u003c\/strong\u003e This drain screw replaces OEM part number 309243.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhat horsepower range does this fit?\u003c\/strong\u003e This part fits select 40HP to 50HP outboard applications from 1989-1997 where OEM 309243 is specified.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhat drive applications does this fit?\u003c\/strong\u003e It fits select OMC Sterndrive \/ Cobra drive applications where the parts diagram calls for OEM 309243.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhat engine types does this fit?\u003c\/strong\u003e This part fits select OMC Cobra drive applications and select Johnson \/ Evinrude outboard gearcase applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhere is this screw used?\u003c\/strong\u003e It is used at the lower unit \/ gearcase drain screw location on compatible applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIs this for every OMC or Johnson \/ Evinrude gearcase?\u003c\/strong\u003e No. Match by OEM part number 309243, model, year, horsepower, and gearcase diagram.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHow should I confirm fitment?\u003c\/strong\u003e Match Sierra 18-1236 or OEM 309243 to your drive model, outboard model, horsepower, year range, owner’s manual, service manual, or gearcase parts diagram before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48565681651944,"sku":"47-1236","price":12.79,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/9927\/6776\/files\/47-1236.jpg?v=1779302205","url":"https:\/\/wakeboss.com\/products\/sierra-18-1236-omc-cobra-drain-screw","provider":"Wakeboss","version":"1.0","type":"link"}