The unit comes equipped with a single set screw and the necessary mounting hardware to ensure a positive lock on the shaft

While this is an OEM York part

including 2"

a different A-series model or a bore reducer/adapter would be required

Simplified Calibration: Enables rapid field setpoint verification and adjustment

Lochinvar & A.O. Smith 100208089 Blower Gasket The unit comes equipped withThe Lochinvar & A. O. Smith 100208089 Blower Gasket is a critical high temperature seal engineered for high efficiency commercial water heater and boiler assemblies. As a veteran grade OEM replacement part, this blower gasket ensures a gas tight interface between the blower motor assembly and the combustion chamber, preventing flue gas leakage and maintaining precise combustion air pressure. This specific component is the direct successor to and a