A warewash machine includes a housing defining at least one area for spraying liquid on wares. A conveyance mechanism is provided for moving wares through the housing from an input end to an output end of the housing. A drive system drives the conveyance mechanism. The drive system includes a drive motor (200) having an output shaft and a slip clutch assembly (202) connected between the output shaft and the conveyance mechanism. The slip clutch assembly (202) includes a torque input side, a torque output side, and an adjustment member (250) positionable in either a first orientation that sets a first pre-i selected slip clutch torque limit or a second configuration that sets a second pre-selected slip clutch torque limit that is different than the first pre-selected slip clutch torque limit.