OEM Carrier Bryant Payne Furnace Exhaust Venter Inducer Motor 337386-721. This is a Brand New OEM Upgraded Carrier/Bryant/Payne Furance Draft Inducer Motor Assembly. This 2 speed motor is rated at 115 volt and 3030 RPM. It replaces the part numbers listed below. An inducer motor is designed to expel the exhaust gas from the furnace. Older inefficient furnaces allowed the flue gas to escape the unit with virtually no resistance. Newer high efficient furnace heat exchangers are so restrictive that the flue gases cannot exit the furnace though “natural draft”. Therefore, the inducer is required to pull the flue gases through the heat exchanger. The inducer motor is usually the first thing that starts up when your furnace calls for heat. Replaces Old Part #s. Partial List of Units that Use This Item. Hit Ctrl + F and enter your model number for a quick search!