{"product_id":"oem-goodman-43-natural-gas-burner-orifice-for-gmt140-5a-b4089343","title":"OEM Goodman #43 Natural Gas Burner Orifice for GMT140-5A — B4089343","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB4089343 Burner Orifice #43\u003c\/strong\u003e is a genuine OEM brass metering spud drilled to a \u003cstrong\u003enumber 43 (0.089\")\u003c\/strong\u003e bore for the \u003cstrong\u003eGoodman GMT140-5A\u003c\/strong\u003e natural gas furnace. This orifice regulates gas flow into each in-shot burner so the furnace fires at its rated input with a clean, stable flame and correct combustion.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Natural gas burner orifice (spud)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e B4089343\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Size:\u003c\/strong\u003e #43 (approx. 0.089\" bore)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Natural gas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Machined brass, standard pipe thread\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Goodman GMT140-5A (140K BTU) burner assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe #43 bore is precisely sized to Goodman's manifold pressure and BTU derating for the GMT140-5A. Using an incorrectly sized or generic orifice changes the fuel rate, risking sooting, under-firing, or nuisance lockouts. A factory-matched B4089343 guarantees the burner fires exactly as engineered.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5).\u003c\/strong\u003e Shut off the gas supply, access the manifold, and replace the orifice with a correctly sized socket. Apply approved thread sealant sparingly and leak-check with soap solution after reassembly. Gas work should be completed or verified by a licensed HVAC professional.\u003c\/p\u003e\u003cp\u003eConfirm your orifice drill size against your unit's rating plate before ordering, or reach us at info@nationalhvacparts.com for fitment help.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058164121971,"sku":"GOODMAN-12474","price":8.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-natural-gas-burner-orifice-for-gmt140-5a-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}