{"product_id":"oil-filter-westerbeke-47-237800","title":"Sierra 47-237800 Oil Filter – Westerbeke Marine Diesel Engine","description":"\u003ch2\u003eSierra 47-237800 Oil Filter – Westerbeke Marine Diesel Engine\u003c\/h2\u003e\u003cp\u003eA direct-fit replacement oil filter for compatible Westerbeke marine diesel engines, built to Sierra’s marine-grade specifications. Westerbeke diesels are workhorses found on sailboats, trawlers, and liveaboard vessels — and keeping the oil filtration system in top condition is one of the most important steps in protecting engine longevity. This filter is engineered to maintain proper oil flow and filtration efficiency through the full service interval, trapping wear-causing contaminants before they reach critical engine components.\u003c\/p\u003e\u003cp\u003eSierra’s marine oil filters meet or exceed OEM specifications for filtration media quality, bypass valve performance, and thread fit. Always verify fitment against your specific Westerbeke engine model and service manual before ordering.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDirect-fit replacement for compatible Westerbeke marine diesel engines\u003c\/li\u003e\n\u003cli\u003eMeets or exceeds OEM filtration specifications\u003c\/li\u003e\n\u003cli\u003eQuality filtration media for effective contaminant removal\u003c\/li\u003e\n\u003cli\u003eCorrect bypass valve rating for marine diesel service intervals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest Use Case\u003c\/h3\u003e\u003cp\u003eThe practical choice for sailors, trawler owners, and liveaboards performing routine oil changes on their Westerbeke diesel auxiliary engine or generator. Particularly useful for boaters who service their own engines and want a reliable, marine-rated aftermarket filter at a lower cost than the OEM part. Cross-reference your Westerbeke engine model number against Sierra’s application guide before installation to confirm fitment.\u003c\/p\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eIf your vessel runs a Westerbeke engine, you may also need impeller service kits — see the \u003ca href=\"\/products\/impeller-kit-westerbeke-sierra-47-233307\"\u003eSierra 47-233307 Impeller Kit for Westerbeke\u003c\/a\u003e or the \u003ca href=\"\/products\/impeller-kit-westerbeke-sierra-47-233306\"\u003eSierra 47-233306 Impeller Kit for Westerbeke\u003c\/a\u003e, as well as the \u003ca href=\"\/products\/westerbeke-impeller-kit-48500-raw-water-pump-service-kit\"\u003eWesterbeke Impeller Kit 48500 – Raw Water Pump Service Kit\u003c\/a\u003e. For Onan generator oil filter needs, see the \u003ca href=\"\/products\/sierra-47-237804-oil-filter-onan-marine-generator\"\u003eSierra 47-237804 Oil Filter – Onan Marine Generator\u003c\/a\u003e. For a universal full-flow marine oil filter option, see the \u003ca href=\"\/products\/full-flow-oil-filter-20-micron-seachoice-50-21021\"\u003eFull-Flow Oil Filter – 20-Micron – Seachoice 50-21021\u003c\/a\u003e.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199647580196,"sku":"47-237800","price":20.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-237800.jpg?v=1785611129","url":"https:\/\/marisolmarine.com\/products\/oil-filter-westerbeke-47-237800","provider":"Marisol Marine Company","version":"1.0","type":"link"}