How do I adjust the mixture screws on my carburetor? To set idle mixture screws: 1. Get the engine up to temp. 2. Shut the engine off. 3. Install a vacuum gauge to a full manifold vacuum port. 4. Turn the screws all the way in until lightly seated. 5. Next, back them out ...
(normally closed by a removable plug 144) so as to, at assembly, adjust the relative initial at rest position of valve member 116. Such adjustment may of course be effected by engaging anchor pin 138 and thereby causing threadable rotation of cup-shaped adjustment member 126 connected thereto...