{"product_id":"oem-goodman-43-burner-orifice-for-amv80704bxa-furnace-b4089343","title":"OEM Goodman #43 Burner Orifice for AMV80704BXA Furnace — B4089343","description":"\u003ch2\u003eGoodman B4089343 #43 Burner Orifice (Spud)\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB4089343\u003c\/strong\u003e is a genuine OEM natural-gas burner orifice drilled to \u003cstrong\u003esize #43\u003c\/strong\u003e, used on \u003cstrong\u003eGoodman\/Amana AMV80704BXA\u003c\/strong\u003e 80% variable-speed gas furnaces. The orifice threads into the manifold and meters the precise gas flow into each in-shot burner, setting the furnace's BTU input. Because a fraction of a millimeter changes firing rate, the drill number must match the furnace's rating plate exactly — using the wrong size causes over\/under-firing, sooting, or nuisance lockouts.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B4089343 (OEM Goodman\/Amana)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Burner orifice \/ spud\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Size:\u003c\/strong\u003e #43\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel:\u003c\/strong\u003e Natural gas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Machined brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e AMV80704BXA and compatible Goodman\/Amana furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold:\u003c\/strong\u003e Each (one per burner)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM B4089343\u003c\/strong\u003e guarantees the exact #43 bore, thread, and seat this manifold requires for correct BTU input and clean combustion. Generic orifices vary in bore tolerance and can shift the firing rate. For a safety-critical gas-metering part, OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (2 of 5).\u003c\/strong\u003e Shut off gas and power, unthread the old orifice from the manifold with a proper wrench, and install the new spud without over-torquing (brass strips easily). Verify manifold pressure after startup. Gas work should be performed by a qualified technician where required by code.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eCompatibility note: confirm the orifice drill number on your furnace rating plate before ordering. Fits Goodman and Amana equipment.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057804493171,"sku":"GOODMAN-7612","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-amv80704bxa-furnace-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}