{"product_id":"quicksilver-replacement-composite-float-8673-for-mercury-3-9-150hp-outboards-oem-fit-restores-fuel-control","title":"Quicksilver Replacement Composite Float 8673 for Mercury 3.9–150hp Outboards — OEM Fit Restores Fuel Control","description":"\u003cp\u003e\u003cstrong\u003eThe Quicksilver 8673 replacement composite float restores proper carburetor fuel control in select Mercury 3.9–150hp 2-stroke outboard engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen a carburetor float fails—sinking, leaking, or sticking—fuel level and engine performance suffer. The Quicksilver 8673 is a direct-fit composite float designed for specified Mercury 2-stroke 3.9–150 horsepower outboards, manufactured to meet Mercury Marine original equipment specifications. It’s intended as a like-for-like replacement to help return reliable fuel metering and reduce fuel overflow or starvation issues that can cause hard starting, rough idling, or flooding.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and carburetors use the Quicksilver 8673 float?\u003c\/h3\u003e\n\u003cp\u003eThis float fits select Mercury 2-stroke outboards in the 3.9 to 150 horsepower range. Always confirm compatibility using your owner’s or service manual and the engine’s parts diagram before ordering. If your parts listing cites the 8673 float number, this Quicksilver unit is the OEM-quality replacement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for specific Mercury 2-stroke 3.9–150hp models\u003c\/li\u003e\n  \u003cli\u003eIntended as a direct replacement for floated carburetor assemblies listed in parts diagrams\u003c\/li\u003e\n  \u003cli\u003eCheck engine serial and model numbers against service manuals for exact fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does replacing the float improve outboard performance?\u003c\/h3\u003e\n\u003cp\u003eA healthy float maintains the correct fuel level inside the carburetor bowl so the engine receives the right air-fuel mixture. Replacing a worn or damaged float reduces fuel overflow, prevents flooding, and helps stabilize idle and throttle response. It’s a small part with a direct effect on drivability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePrevents fuel overflow and wet spark plugs\u003c\/li\u003e\n  \u003cli\u003eHelps maintain consistent idle and acceleration\u003c\/li\u003e\n  \u003cli\u003eReduces risk of fuel starvation at various engine loads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I inspect or replace while servicing the carburetor?\u003c\/h3\u003e\n\u003cp\u003eWhen you remove a faulty float, it’s a good practice to inspect the float needle, seat, gaskets, and carburetor bowl for wear or debris. Replacing associated seals and gaskets at the same time avoids repeated disassembly later and ensures a reliable seal and operation. Follow the service manual for torque specs and assembly order.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInspect float needle and valve seat for wear or corrosion\u003c\/li\u003e\n  \u003cli\u003eReplace carburetor gaskets and bowl o-rings as recommended\u003c\/li\u003e\n  \u003cli\u003eClean passages and jets to prevent clogging before reassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the Quicksilver 8673 a genuine OEM-quality part?\u003c\/h3\u003e\n\u003cp\u003eYes. The Quicksilver brand supplies parts engineered to meet Mercury Marine original equipment specifications and undergoes rigorous testing for marine applications. Choosing this replacement means you get materials and tolerances intended to match original performance and longevity.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eManufactured to OEM standards for fit and function\u003c\/li\u003e\n  \u003cli\u003eBuilt from composite materials resistant to fuel exposure\u003c\/li\u003e\n  \u003cli\u003eBacked by Quicksilver’s long history in marine parts and accessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Quicksilver 8673 composite float is aimed at boat owners, marine mechanics, and service shops maintaining Mercury 2-stroke outboards in the 3.9–150hp range who need a reliable, OEM-spec replacement component. It’s ideal for routine carburetor repair or rebuilds where restoring proper fuel level control is essential. Always consult your parts list or service manual for model compatibility and installation guidance before purchasing and installing this float.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this float fit my Mercury outboard?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your engine model and parts list; the 8673 float fits select Mercury 3.9–150hp 2-stroke models. Verify with the service manual.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Should I replace other parts when installing the float?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—inspect and consider replacing the float needle, seat, and carburetor gaskets to ensure reliable operation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":48084349616286,"sku":"B000XBGSR0","price":29.53,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/quicksilver-8673-front-view.jpg?v=1785851300","url":"https:\/\/northtrailauto.ca\/products\/quicksilver-replacement-composite-float-8673-for-mercury-3-9-150hp-outboards-oem-fit-restores-fuel-control","provider":"North Trail Auto","version":"1.0","type":"link"}