I don't know much about them, so please forgive me ahead of time

Are there any factory settings, such as turns on the idle & mixture screws on the 22r carb? My truck is running rich and i'd like to set it to factory and then work from there if it's possible.

I ask this because i've had some experience with the carbs on the jet skis we have, setting the highs and lows for performance, but they also have a specific factory setting, such as turn then all the way in, then so many turns & fractions of turns out

Is there such a thing for my carb? 84' 22r.

Tried the search, and my service manual..no such luck <img src="/forums/images/graemlins/frown.gif" alt="" />

Thanks in advance.