{"product_id":"oem-goodman-43-burner-orifice-for-gmnt090-5b-b4089343","title":"OEM Goodman #43 Burner Orifice for GMNT090-5B — B4089343","description":"\u003cp\u003eThe genuine Goodman \u003cstrong\u003eB4089343 #43 Burner Orifice\u003c\/strong\u003e (gas spud) is a factory-original metering jet for the \u003cstrong\u003eGMNT090-5B\u003c\/strong\u003e gas furnace. The orifice controls the exact volume of gas delivered into each in-shot burner, setting the furnace's BTU input and combustion quality. The \u003cstrong\u003e#43 drill size\u003c\/strong\u003e is calibrated for the factory-specified gas type and manifold pressure, so replacing a damaged or wrong-sized orifice restores correct, safe firing.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B4089343\u003c\/li\u003e\n\u003cli\u003eType: Burner orifice \/ gas spud\u003c\/li\u003e\n\u003cli\u003eOrifice Size: #43 drill\u003c\/li\u003e\n\u003cli\u003eMaterial: Machined brass\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMNT090-5B gas furnace\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (genuine OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOrifice sizing is not a place to improvise — an over- or under-drilled generic spud changes the air-fuel ratio, risking sooting, high CO, or nuisance lockouts. The OEM B4089343 is precision-machined to the exact #43 bore Goodman engineered for this furnace, ensuring correct BTU input and clean combustion.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Shut off gas and power, remove the burner, and thread the orifice out of the manifold with a properly sized wrench — do not over-tighten brass. Install the matching-size replacement, reassemble, and confirm a clean blue flame. About 15 minutes. Verify manifold pressure after service; if unsure, use a licensed technician.\u003c\/p\u003e\u003cp\u003eAlways shut off gas and electrical power before servicing.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058130698611,"sku":"GOODMAN-11713","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-gmnt090-5b-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}