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The Goodman 10716005 Natural Gas Orifice (burner spud) is a genuine OEM metering fitting for the VMS80403AXAA gas furnace and related Goodman/Amana 80% AFUE models. Threaded into the gas manifold, each orifice meters the precise volume of natural gas delivered to its in-shot burner. A damaged, corroded, or incorrectly drilled orifice throws off the fuel/air ratio, producing lazy yellow flames, sooting, or under-firing. Correct orifice sizing is essential for rated BTU output and clean combustion.
Orifice drill size directly controls the firing rate and CO output of the furnace. Genuine Goodman OEM orifices are factory-drilled to the exact diameter matched to your model's manifold pressure and BTU rating. Generic or mis-sized spuds risk over- or under-firing. Never substitute an LP orifice for natural gas.
Moderate (3/5). Requires removing the gas manifold and wrenching out the spud, then reinstalling and leak-checking every joint. A technician should verify manifold pressure and flame appearance after replacement. Shut off gas and power before servicing.