VW Factory Training Video - Carburetor Adjustment 

The 34 PICT-3 stopped capping that "VOLUME" screw long ago. You set the base idle with the bypass and then set the volume screw by ear. If the volume is too far out you will hear blatting. Too far in and the rpms will start to drop off. This volume setting will/should be within one turn (360 degrees) of the screw (in or out) from the base setting of 2.5 turns out.

I remember elementary school - a filmstrip was boring but a film was a rare and delightful occurrence. I don't know how a film of a filmstrip rates generally, but this one is great!

Nice information, thank you... I have problem my brosol 31 carb, even volume conttol screw is of the engine still run...what about you...🙏

Thank you for posting this video. They had way better training videos back then.

I guess I was doin' it right all along. Go figure.

I like this old videos