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The Goodman 10716003 natural gas orifice (burner spud) is the OEM brass fitting that meters the precise gas flow into each in-shot burner. It is a direct-fit replacement for AMH80905CNAA gas furnaces and other compatible Goodman/Amana models. A damaged, corroded, or incorrectly-sized orifice throws off the air/fuel mixture, causing lazy or lifting flames, sooting, poor efficiency, or nuisance faults. Installing the correct OEM orifice restores clean, correctly-sized combustion.
Orifice drill size is calculated for your furnace's BTU input and local gas pressure. The OEM Goodman orifice guarantees the exact bore diameter the unit was certified with. Never substitute an unmarked generic spud or re-drill an orifice — incorrect sizing directly affects combustion safety and CO output. OEM is required.
Moderate. Shut off gas and power, remove the manifold or access the burner, thread the orifice out with a proper spud wrench, and torque the new one in. Verify manifold pressure and check for leaks with the burners lit. Recommended for HVAC professionals; 20–30 minutes.