Hello, new here I have an older 2 stroke pusher ~1990 had since new. looking for advice on where to find a new carb and air vane assy original #683632 or replacement #684352. My throttle vane assy is shot. not sure if a rebuild is in order or just buy new. Mower has been great. Worth fixing. I had a lawn service in college (Early 80's)and we ran LawnBoys 8 hours a day. At the time they were the only machines that would hold up, Probably got about 3 sets of wheels before they were too tired to go on! Suprising longetivity considering my care and maintenance at the time was minimal at best. Gas and go....Any help is most appreciated....Ed