Finally: I made a tool and removed the governor from below. The tool looks like a 1 7/16" hex wrench, but...critical design elements are: a.)wrench can be only 3/16" thick, b.) sides of the wrench can be no thicker than 3/8", and c.)in the absence of the pictured angling of the wrench arm, the fill plug for the OD had to be removed to allow clearance and fit. The wrench I made was only 5 in long, so I had a hard time getting enough force/torque to break the threads loose ( I used a pipe wrench on the end at right angles to the wrench handle, parallel to the plane of rotation). The wrench head was also mounted at 75 degrees to the long axis of the handle; this may not be necessary. End result: governor removed, new switch installed, OD still doesn't engage!!!!I would attach a photo, but haven't figured how to do it. Thanks for help and photos.