Attached is a link to the 1950-1988 Lawn-Boy service manual pdf file. You can learn how to adjust the governor (and anything else). The governor parts are all plastic save the spring. It is probably badly warn and binds at start and finally frees up. I know Lawn-Boy (Toro) no longer has the governor parts. I have a 1978 Mod. 8310. The governor was replaced about three years ago. I saved the warn parts thinking if needed I could use a 3D printer to make a replacement.