Please identify the mixture screw
 

I need to locate the mixture screw on my ´74 carrera US CIS
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http://forums.pelicanparts.com/uploa...1124001715.jpg
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please flashlight in a circle

Look for a small hole where Russian Blue is pointing. You need to get a long 3mm allen wrench down in there.

Yup, and if (highly unlikely) no one has ever been in there - there may be an aluminum plug/cap you will need to remove to reveal that 3mm allen....

Do yourself a favor and make a "T" handled tool from a spare allen key - one that is the perfect size to adjust while in the car.