I tried searching but I couldnt find anything on how to adjust the ************achi carb.Anyone know how?Car is an 83 GL wagon.Who knows once I post this similar threads will come up that didnt come up when I searched...

adjust what? idle screws are there for hot/cold...

 

otherwise here's a good write-up by GD...

 

 

--Spiffy

I played with the idle and mixture screws until it idles steady at 850 RPM.then I turned the mixture screw all the way in.From GD's post that should have made it run lean.except it made my car run like a scalded ape.the power difference between what it was at and what its out now is like comparing an ej22 to ea82.in my little 2400 lb ea81 I could actually burn out going up a hill.

There are no adjustments other than the float setting (have to remove the top of the carb for that), the idle speed screw (throttle stop), and the idle mixture screw (which, contrary to popular belief adjusts the mixture VOLUME not the actual mixture ratio) which is blocked by a roll pin.

 

To adjust the idle speed and mixture you want the throttle plate nearly closed, and you adjust the mixture till you get the lean best idle. Basically that means it idles smooth at 700 to 800 RPM. You adjust them both in a balancing act. It's really simple - just play with them.

 

Other than that, there aren't any adjustments on a Hitachi. Everything is jetted and if it's working correctly it should need no adjustment.

 

You can make the choke adjustable by pulling the pin from the housing, but that shouldn't be necessary unless you live in some weird arctic region.

 

GD

I played with the idle and mixture screws until it idles steady at 850 RPM.then I turned the mixture screw all the way in.

 

You are idling off the primary circuit rather than the idle circuit if the mixture screw is all the way in. You'll get terrible fuel economy at idle that way, but if you can live with that and like it that way then who am I to argue?

 

GD

gee I thought it ran better and had more power like that..Certanly cured the MASSIVE hesitration from idle to 1800 rpm,and it seemed to make the car Way more powerful from idle to redline (found that out because I floored it because it was so much fun,then I looked down at the tach when I wasnt realy accerating much more found the RPM at 6500-7000 or so..

You are idling off the primary circuit rather than the idle circuit if the mixture screw is all the way in. You'll get terrible fuel economy at idle that way, but if you can live with that and like it that way then who am I to argue?

 

GD

 

as long as it shouldnt negatively effect my overall mpg much than im happy.

although if its turned all the way in shouldnt it run lean?reducing performance rather than running like a scalded ape?