{"product_id":"oem-goodman-43-natural-gas-burner-orifice-for-ams81405dna-b4089343","title":"OEM Goodman #43 Natural Gas Burner Orifice for AMS81405DNA — B4089343","description":"\u003ch2\u003eGoodman B4089343 #43 Natural Gas Burner Orifice\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eGoodman B4089343\u003c\/strong\u003e is a genuine OEM burner orifice (spud) drilled to \u003cstrong\u003e#43\u003c\/strong\u003e size for use with the \u003cstrong\u003eAMS81405DNA\u003c\/strong\u003e furnace and compatible Goodman\/Amana models on natural gas. The orifice meters the exact gas flow into each in-shot burner, setting the furnace's BTU input and air-fuel ratio. A worn, enlarged, or debris-clogged orifice throws off combustion — causing sooting, lifting flames, or reduced heat output — so precise sizing matters.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Burner orifice \/ gas spud\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Size:\u003c\/strong\u003e #43 (natural gas)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Model:\u003c\/strong\u003e AMS81405DNA and compatible Goodman\/Amana furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Meters gas flow to set BTU input per burner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Machined brass with factory-calibrated bore\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eGenuine \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e orifices are machined to the precise #43 bore and thread pitch your furnace requires, guaranteeing correct BTU input and clean combustion. Generic or mis-drilled spuds can over- or under-fire the furnace, risking sooting or heat-exchanger damage. Always match the orifice to your fuel type (natural gas vs. LP) — OEM removes the guesswork.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5).\u003c\/strong\u003e Involves gas work: shut off gas and power, remove the manifold, thread out the old spuds, and install the new #43 orifices to spec. Verify manifold pressure and perform a flame\/combustion check afterward. If uncertain, use a licensed HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057723654515,"sku":"GOODMAN-7239","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-natural-gas-burner-orifice-for-ams81405dna-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}