{"product_id":"oem-goodman-43-burner-orifice-for-ams80903bna-b4089343","title":"OEM Goodman #43 Burner Orifice for AMS80903BNA — B4089343","description":"\u003ch2\u003eGoodman B4089343 Burner Orifice — #43 Drill Size\u003c\/h2\u003e\u003cp\u003eThe Goodman B4089343 is a genuine natural-gas burner orifice (spud) sized to \u003cstrong\u003e#43 drill\u003c\/strong\u003e for the Amana\/Goodman \u003cstrong\u003eAMS80903BNA\u003c\/strong\u003e gas furnace. The orifice meters the exact volume of gas into each in-shot burner, setting the BTU firing rate. Using the correct orifice number is critical — an oversized or damaged orifice causes over-firing, sooting, and unsafe combustion, while an undersized one starves the burner.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart type: Burner orifice \/ spud\u003c\/li\u003e\n\u003cli\u003eDrill size: #43\u003c\/li\u003e\n\u003cli\u003eFuel: Natural gas\u003c\/li\u003e\n\u003cli\u003eThread: Standard Goodman\/Amana manifold thread\u003c\/li\u003e\n\u003cli\u003eCompatible model: AMS80903BNA\u003c\/li\u003e\n\u003cli\u003eOEM part number: B4089343\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman B4089343\u003c\/strong\u003e guarantees the precise #43 bore and thread pitch your manifold requires — the correct choice for verified BTU input and warranty compliance. Our \u003cstrong\u003egeneric #43 orifice\u003c\/strong\u003e matches the same drill size and thread at a lower cost for budget repairs. Always confirm the orifice number stamped on your existing part before ordering.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Shut off gas and power, back the old orifice out of the manifold with a nut driver or socket, and thread in the replacement snugly. Roughly 10–20 minutes for the set. Leak-check the manifold and verify the flame after install.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057704714611,"sku":"GOODMAN-7036","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-ams80903bna-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}