In one aspect, a wireless remote controller for a personal watercraft is provided that includes a watertight housing forming a watertight compartment. The housing includes a through hole extending through the housing from an upper side of the housing to a lower side of the housing. The remote controller includes a throttle interface removably attached to the housing such that the throttle interface is movable between a first position and a second position and at least a portion of the throttle interface positioned within the through hole of the housing. The remote controller further includes a sensor positioned within the watertight compartment of the housing to detect a position of the throttle interface.