{"product_id":"sierra-18-3050-water-pump-impeller-for-johnson-evinrude-2-5-4-hp-outboards-ultra-excel-replaces-omc-386084","title":"Sierra 18-3050 Impeller with Key for Johnson\/Evinrude 2.5, 3, 4, Ultra, Excel Outboards, Replaces OMC 386084","description":"\u003cp\u003eThe Sierra 18-3050 is a water pump impeller designed for Johnson\/Evinrude (OMC\/BRP) outboards, fitting the 2.5, 3, and 4 horsepower models as well as the Ultra and Excel lines. The impeller is the wear component inside the outboard's water pump housing that draws raw water in to cool the engine, and it is one of the most common maintenance replacement parts on a small outboard. This unit ships with a key included, so it is ready to install alongside the pump housing, gaskets, and other water pump service parts without needing to source the key separately. The impeller body is made of alloy steel. As a Sierra part, the 18-3050 is built as a direct equivalent to the OMC impeller it replaces, letting owners restore proper cooling water flow using a part number matched to the original engine specification rather than a generic substitute. Because a worn or cracked impeller is a leading cause of overheating on small outboards, keeping a correctly sized replacement like the 18-3050 on hand is a standard part of routine outboard maintenance for the 2.5, 3, and 4 HP Johnson\/Evinrude Ultra and Excel models.\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 18-3050\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Impeller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Impeller, Key\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor\/Finish:\u003c\/strong\u003e Unfinished\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e OMC 386084\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999237156\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude (OMC\/BRP) outboards: 2.5, 3, 4 HP, Ultra, Excel\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 386084\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat outboards does the Sierra 18-3050 impeller fit?\u003c\/strong\u003e The Sierra 18-3050 is designed for Johnson\/Evinrude (OMC\/BRP) outboards rated 2.5, 3, and 4 horsepower, as well as the Ultra and Excel models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3050 a direct OEM replacement?\u003c\/strong\u003e Yes, the Sierra 18-3050 replaces OMC part number 386084, making it a direct equivalent for that OEM impeller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the impeller come with the key needed for installation?\u003c\/strong\u003e Yes, the 18-3050 ships with a key included, so it is ready to install without sourcing the key separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-3050 impeller made of?\u003c\/strong\u003e The Sierra 18-3050 impeller is made of alloy steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3050 impeller weigh?\u003c\/strong\u003e The Sierra 18-3050 impeller weighs 0.05 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color or finish does the 18-3050 impeller have?\u003c\/strong\u003e The 18-3050 has an unfinished color\/finish, as supplied from the factory.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-3050?\u003c\/strong\u003e Ordering the Sierra 18-3050 gets you the impeller plus the installation key.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace this impeller?\u003c\/strong\u003e A worn, cracked, or brittle impeller reduces raw water flow and is a common cause of overheating in small Johnson\/Evinrude outboards, so replacing the 18-3050 on schedule keeps the cooling system working properly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3050 the same part as the 18-3051 impeller?\u003c\/strong\u003e No, the 18-3050 and 18-3051 are separate Sierra part numbers replacing different OEM impellers, so buyers should confirm which OEM number their engine calls for before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3050 impeller work for both port and starboard installations?\u003c\/strong\u003e The 18-3050 is a water pump impeller and is not a side-specific part; it is used within the outboard's single water pump housing rather than mounted on a specific side.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat brand makes the 18-3050 impeller?\u003c\/strong\u003e The 18-3050 impeller is manufactured by Sierra.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-3050?\u003c\/strong\u003e The Sierra 18-3050 impeller carries UPC 030999237156.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988137390299,"sku":"SIE-18-3050","price":13.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3050_lg__16034.1558123452.500.750.jpg?v=1785188298","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3050-water-pump-impeller-for-johnson-evinrude-2-5-4-hp-outboards-ultra-excel-replaces-omc-386084","provider":"Good Vibes Marina","version":"1.0","type":"link"}