mixture screw ?

[kicknjeep]

On the MC2100/2150 which screw does what on the front of the carb
(air/fuel mixture screws)? both are out more than they should be, about
2 1/2-3 turns and seems to be running rich.

 

[elwood blues]

There are two screws, one for each barrel. They have to be adjusted simultaniously, and in conjunction with the idle adjustment screw.

2 1/2 turns out is the typical place to start your tweeking from. Having said that, I am also under the understanding that a MC2100/2150 (1.08 venturi size) on a AMC 258 i6 / 4.2l should run between a 46-48 jet size. I'm running 51 jets, and the idle mixture screws are out probably 3ish turns, and it's actually running a little lean. From what I have read, and talked to others who have done this conversion, the MC2100/2150 can be a touch tricky to get tuned, and every person has a little different setup.

 

[elwood blues]

http://street2mud.com/webfiles/MC-2100%20set%20up%20for%20a%20258.pdf

This has been a HUGE help and reference during my MC2100 swap.

 

[kicknjeep]

hey EB thanks for the site this is on a AMC 304 V8

 

[elwood blues]

Okay, then you only need to look at pags 24-27, those are tuning.

 

[kicknjeep]

cool beans thanks bro.