need help with a 1990s Mercury 150 on how to adjust the idling

[yellowfin111]

I have a 1990s mercury v6 2.0l need help on the idling adjustment don't know how to adjust it dosn't have a screw with a spring like most carburators any help would be great thanks

 

[Barnacle_Bill]

I highly recommend you get a manual then follow the procedures for doing a link and sync.

 

[Chris1956]

Some of the Merc V6 motors had 6 idle mixture adjustments and some have no idle mixture adjustments. There will be two mixture adjustments (or zero) on each carb. What do you have?

Also, idle speed is set by adjusting a machine screw with a lock nut.

 

[yellowfin111]

thanks for the help guys i fixed the idling with the screw with the lock nut like chris said thanks