Getting parts for a Rochester from Jon is about as likely as finding a chicken with lips! He's a Carter guy, as are most of us with a lot of years' experience making stovebolts run right. Chances are, the main jet isn't your problem- - - -it's a sticky power valve that stays open most, or all of the time and bypasses the main jet. Polish the power piston with a felt buffing wheel and some jewelers' rouge, and do the same thing to the bore it rides in, using a wool gun cleaning mop that is a snug fit in the housing. Then check the top of the carburetor for warp- - - -they're notorious for opening up a vacuum passageway and leaking enough vacuum to let the power valve open up too soon. "The ABC's of fuel systems- - - -Always Buy Carter!"
Jerry
