{"product_id":"yanmar-impeller-kit-119578-42750","title":"Yanmar Seawater Pump Impeller Kit 119578-42750","description":"\u003cp\u003eThe \u003cstrong\u003eYanmar 119578-42750 Impeller Kit\u003c\/strong\u003e is a genuine-style seawater pump service kit for select Yanmar marine diesel engines, most commonly the \u003cstrong\u003e6LY3\u003c\/strong\u003e series. It is used to service the raw-water pump impeller, helping maintain proper seawater flow through the cooling system and reducing the risk of overheating. The kit is commonly listed with the impeller, cover O-ring, and cover screws\/pins needed for routine seawater pump service.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSeawater pump impeller service kit\u003c\/li\u003e\n\u003cli\u003eGenuine Yanmar part reference: \u003cstrong\u003e119578-42750\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eUsed for raw-water pump \/ seawater pump maintenance\u003c\/li\u003e\n\u003cli\u003eHelps restore cooling-water flow through the seawater pump\u003c\/li\u003e\n\u003cli\u003eCommon kit contents include:\n\u003cul\u003e\n\u003cli\u003eImpeller\u003c\/li\u003e\n\u003cli\u003eCover O-ring\u003c\/li\u003e\n\u003cli\u003eCover plate screws \/ pins, quantity \u003cstrong\u003e6\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eSupporting component references include \u003cstrong\u003e119578-42560\u003c\/strong\u003e cover O-ring and \u003cstrong\u003e119578-42570\u003c\/strong\u003e cover pins \/ screws\u003c\/li\u003e\n\u003cli\u003eReplaces earlier Yanmar references including \u003cstrong\u003e119574-42552\u003c\/strong\u003e in supported applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis impeller kit is most strongly associated with Yanmar \u003cstrong\u003e6LY3\u003c\/strong\u003e marine diesel engines, including \u003cstrong\u003e6LY3-ETP, 6LY3-STC, 6LY3-STP, 6LY3-UTC, and 6LY3-UTP\u003c\/strong\u003e models. Some catalog references also list 24V variants of these 6LY3 engines. Additional cross-reference sources show broader 6LYA and 6LY2 family associations, but fitment should be confirmed by the exact seawater pump and engine serial number before ordering.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eSeawater pump impeller fitment depends on the exact Yanmar engine model, seawater pump assembly, pump cover style, and serial number range. Confirm compatibility using the engine serial number and current pump parts diagram before ordering. Some references specifically list this kit for \u003cstrong\u003e6LY3-ETP \/ 6LY3-STP \/ 6LY3-UTP\u003c\/strong\u003e, while another reference notes it is \u003cstrong\u003enot suitable for 6LY440 or 6LY2A\u003c\/strong\u003e models, so pump-level verification is important.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace the impeller during scheduled seawater pump service, after overheating, after dry running, or when the impeller vanes are cracked, stiff, worn, missing, or permanently bent. A weak or damaged impeller can reduce cooling-water flow and may lead to engine overheating.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eInspect the pump cover, O-ring groove, cover screws, cam, wear plate, pump body, and shaft condition while the pump is open. Lubricate the new impeller as specified, install it in the correct rotation, and confirm the cover O-ring is seated properly before tightening the cover hardware evenly. After startup, verify seawater discharge and check for leaks at the pump cover.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e119578-42750\u003c\/li\u003e\n\u003cli\u003eYanmar 119578-42750\u003c\/li\u003e\n\u003cli\u003eYM11957842750\u003c\/li\u003e\n\u003cli\u003e119574-42552\u003c\/li\u003e\n\u003cli\u003e119574-42550\u003c\/li\u003e\n\u003cli\u003e119574-42550-01\u003c\/li\u003e\n\u003cli\u003e119574-42551\u003c\/li\u003e\n\u003cli\u003eRelated kit component: \u003cstrong\u003e119578-42560\u003c\/strong\u003e cover O-ring\u003c\/li\u003e\n\u003cli\u003eRelated kit component: \u003cstrong\u003e119578-42570\u003c\/strong\u003e cover pins \/ screws, quantity 6\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis kit is best matched by the seawater pump assembly, not just the engine family. The 6LY series has several closely related models, and cross-references are not always consistent, so confirming the pump diagram before ordering helps avoid the wrong impeller kit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"YAN","offers":[{"title":"Default Title","offer_id":43564302565412,"sku":"119578-42750","price":167.77,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/ff9fa2ac-b101-4b7c-b640-dad05703ccfb.png?v=1777957763","url":"https:\/\/marisolmarine.com\/products\/yanmar-impeller-kit-119578-42750","provider":"Marisol Marine Company","version":"1.0","type":"link"}