Here's one I hope someone's run into, just got 4 new carb diaphragms for the 83, changed over the needles and low and behold the diaphragm springs will not go to the bottom of the plastic barrel, goes in fine about an inch, then hits a lip. Waiting for Zanotti to call back to see if they have any insight, can't believe this is right as the springs fit fine in the originals, part # is 41r-14940-00-00.