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The OEM Goodman 10716003 Natural Gas Burner Orifice (spud) meters the flow of natural gas into the burner on the AMH80904BXCA gas furnace and compatible Goodman/Amana models. This precision factory-drilled orifice sets the BTU input for each burner tube; the exact bore diameter is what keeps the furnace firing at its rated capacity with a clean, efficient flame. A damaged, corroded, or incorrectly drilled orifice leads to sooting, under-firing, or delayed ignition.
Orifice bore size is not something to approximate — it directly determines firing rate and combustion safety. This genuine Goodman orifice is drilled to the factory-specified diameter and threaded to seat correctly in the manifold. Generic or mis-drilled spuds can over- or under-fire the furnace, producing carbon monoxide or nuisance lockouts.
Rated Moderate. Shut off gas and power, then unthread the orifice from the gas manifold with the correct socket, install the replacement snugly (do not over-torque), and leak-check every joint with soap solution before firing. Confirm the orifice matches your fuel type and altitude rating. Because this repair opens the gas manifold, we recommend a licensed HVAC professional if you are not experienced with gas work.