{"product_id":"oem-goodman-43-burner-orifice-for-gmnt090-3b-b4089343","title":"OEM Goodman #43 Burner Orifice for GMNT090-3B — B4089343","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B4089343 Burner Orifice\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003e#43-drilled gas spud\u003c\/strong\u003e for the \u003cstrong\u003eGMNT090-3B\u003c\/strong\u003e furnace. The orifice meters the exact gas flow into each in-shot burner, setting the furnace's BTU input. Using the correct drill size is critical — an incorrect orifice changes firing rate and can cause sooting, poor efficiency, or overheating.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Burner orifice \/ gas spud\u003c\/li\u003e\n\u003cli\u003eDrill size: #43\u003c\/li\u003e\n\u003cli\u003eFuel: Natural gas (verify against your rating plate)\u003c\/li\u003e\n\u003cli\u003eSold: Individually (one per burner)\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMNT090-3B and compatible furnaces specifying a #43 orifice\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: B4089343\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eGas metering leaves no room for error. The \u003cstrong\u003eOEM B4089343\u003c\/strong\u003e is precision-drilled and gauged to the furnace's rated input. Generic orifices can vary in bore diameter and thread pitch, altering BTU output and combustion quality. For any gas-metering component, the exact OEM orifice is the safe, code-correct choice.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e A 5–10 minute task per orifice: shut off gas, remove the manifold or unscrew the spud, thread in the new orifice, and check for leaks with soap solution after restoring gas. Requires a nut driver or wrench. Confirm the drill number stamped on your existing orifice matches #43 before installing.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSafety note: Never substitute an LP orifice on a natural-gas unit (or vice versa). Match fuel type and drill size exactly.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058130207091,"sku":"GOODMAN-11698","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-gmnt090-3b-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}