I picked up a low hour, (189.6) abandoned 416h yesterday. Does anyone know what size the o-ring is that seals the carb to the air cleaner? Mines cracked and I expected it to break in pieces when I remove it there by making it useless for sizing at the hardware store. Also, the voltage regulator is missing. Has anyone tried used a regulator from a Kawasaki as a replacement? I have a couple here and thought about trying them. Can anyone tell me if this engine has the governor spacer with the tab? Thanks.