{"product_id":"crankshaft-main-bearing-for-sea-doo-sport-18-300-1630-2026","title":"Crankshaft Main Bearing for Sea-Doo Sport 18-300 1630 2026","description":"\u003ch2\u003eCrankshaft Main Bearing for Sea-Doo\u003c\/h2\u003e\u003cp\u003eThis crankshaft main bearing is a replacement engine component that supports the crankshaft inside the 1630 Rotax engine used across Sea-Doo Sport 18-300 models. A crankshaft main bearing helps keep the crank rotating on a stable axis and protects the block from excessive wear and vibration. It is intended for riders and mechanics rebuilding or servicing the 1630 engine on 2026 Sea-Doo Sport 18-300 machines.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis crankshaft main bearing is a service part for the 1630 engine found in Sea-Doo Sport 18-300 watercraft built for the 2026 model year. The bearing carries radial load from the crankshaft and helps maintain correct alignment inside the crankcase during operation. It is a direct-fit replacement component for rebuilds, refreshes, and routine engine repair on these machines.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBuilt to support radial load on the crankshaft of the 1630 engine\u003c\/li\u003e\n\u003cli\u003ePrecision sizes for proper oil clearance and smooth rotation\u003c\/li\u003e\n\u003cli\u003eHardened bearing surfaces for resistance to wear under load\u003c\/li\u003e\n\u003cli\u003eDesigned for the 1630 Rotax engine architecture used in Sea-Doo Sport 18-300\u003c\/li\u003e\n\u003cli\u003eSold as a single crankshaft main bearing for rebuild or service work\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Sea-Doo Sport 18-300 1630 (2026)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEngine rebuilds and bottom-end refreshes on 1630-powered Sea-Doo Sport 18-300\u003c\/li\u003e\n\u003cli\u003eReplacing worn or out-of-spec main bearings during crankshaft service\u003c\/li\u003e\n\u003cli\u003eShop and DIY repair work on Sea-Doo Sport 18-300 watercraft\u003c\/li\u003e\n\u003cli\u003ePreventive maintenance on high-hour 1630 engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCrankshaft Main Bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1630 Rotax\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003efor Sea-Doo Sport 18-300 (2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 Bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to replace all main bearings at once? \u003cstrong\u003eA:\u003c\/strong\u003e When the engine is apart for a rebuild, it is good practice to replace all main bearings together so wear stays even across the crankshaft. Confirm the correct bearing size against your engine's service data before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I install this without machining the crankcase? \u003cstrong\u003eA:\u003c\/strong\u003e In most cases this bearing installs as a direct replacement if the crankcase journals are within spec. If the case shows scoring or out-of-round wear, have it checked before assembly.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":51065780863062,"sku":"OO1C08533","price":35.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_ebc7d4dd-9bda-4d17-b188-8e4d82fe98e6.jpg?v=1794394810","url":"https:\/\/www.solidspare.com\/products\/crankshaft-main-bearing-for-sea-doo-sport-18-300-1630-2026","provider":"Solid Spare","version":"1.0","type":"link"}