54Mercury Carb question

[Bob from Northport]

Which is the cold fast idle, and which is the warm idle setting screw???

 

[51504bat]

 

[Alaska Jim]

the screw on the "toothed/stepped" lever is for the fast idle speed. if the choke is adjusted correctly , as the eng. warms up, you can tap the throttle and the lever will drop down to a different speed on each "step". To adjust the fast idle -- with the eng cold and choke fyll closed, start the eng. make sure the screw is on the Highest step and set the fast idle speed to spec. after the eng is warmed up enough to have the fast idle screw come off the stepped cam, adjust the slow idle speed to the specified rpm. hope this makes sense and helps.