{"product_id":"oem-goodman-43-burner-orifice-for-ams80905cna-furnace-b4089343","title":"OEM Goodman #43 Burner Orifice for AMS80905CNA Furnace — B4089343","description":"\u003ch2\u003eGoodman B4089343 #43 Burner Orifice\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eGoodman B4089343 Burner Orifice\u003c\/strong\u003e is a genuine OEM #43 drill-size gas orifice (spud) for the \u003cstrong\u003eAMS80905CNA\u003c\/strong\u003e furnace and compatible Goodman and Amana models. The orifice threads into the manifold and meters the precise volume of gas fired into each in-shot burner — the single most important factor in achieving correct BTU input and clean combustion. A worn, corroded, or incorrectly sized orifice causes lazy flames, sooting, or under-firing; installing the factory-spec orifice restores rated output.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B4089343\u003c\/li\u003e\n\u003cli\u003ePart Type: Burner orifice \/ gas spud\u003c\/li\u003e\n\u003cli\u003eDrill Size: #43\u003c\/li\u003e\n\u003cli\u003eFuel: Natural gas\u003c\/li\u003e\n\u003cli\u003eMaterial: Machined brass\u003c\/li\u003e\n\u003cli\u003eCompatibility: Goodman \/ Amana AMS80905CNA and related furnaces\u003c\/li\u003e\n\u003cli\u003eSold as: Single orifice (match quantity to burner count)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOrifice sizing is exact — a fraction of a millimeter changes the BTU input and gas\/air ratio. This OEM #43 orifice is drilled to Goodman's specification for correct manifold pressure and firing rate. Generic or mismatched orifices risk over\/under-firing, sooting, and even unsafe combustion. Always match OEM.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate.\u003c\/strong\u003e About 15–30 minutes for a full set. Requires shutting off gas, removing the manifold, and swapping orifices with a nut driver. Recommend a combustion\/manifold-pressure verification afterward — best confirmed by a technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057708679539,"sku":"GOODMAN-7103","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-ams80905cna-furnace-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}