My carb has a bolt and when i take that bolt out i unscrew the jet... so is this adjustable or not? Ive just got it screwed in tight. I have since replaced this bolt with the correct size. I pulled it and it looked ok but ill take it out and clean it tonight.. im not carb guy ( you are talking about the thing under the big bolt you unscrew at the front of the carb right?
Heres the bolt picture and when i unscrew this there is a jet up in there
http://img.photobucket.com/albums/v678/pdinkle75/Mobile%20Uploads/20150218_182057_zpsjjebrubi.jpg
