do you have the owners manual for the carb? my stang had the 1406 on it, my mont has the 1806 (1406=600cfm, 1806=650cfm thunderjet AVS). if you dont have em i think i got an extra book somwhere.
Check the carb# here....i'm 50% sure it's a performer 600 cfm.
The front screws are idle mixture screws.
The procedure I use to adjust carburetors is as follows.
- Allow the engine to fully warm up.
- Check for vacuum leaks.
- Set the initial timing with the vacuum advance unhooked and the line plugged. Reattach vacuum line.
- Verify correct fuel pressure. If you are feeling ready for the challenge verify/adjust bowl float height.
- Adjust the Idle mixture screws to optimal setting. This is done by adjusting the screws on the front of the carburetor. Turning these screws in (clockwise) enriches the idle mixture and turning the screws out (counter clockwise) leans the idle mixture. As you lean out the mixture the idle speed will initially start to speed up. Then when the mixture becomes too lean the idle will stumble. Lean out the mixture to obtain highest idle speed possible.
- Adjust the curb idle screw to optimal setting. This is the screw on the side of the carburetor by the throttle linkage that holds the throttle slightly open at idle. I turn this screw to set the idle speed as low as possible. Sometimes it is necessary to slightly blip the throttle after adjustments to allow the idle linkage to properly rest.
Repeat steps 5 and 6 until lowest idle speed possible is produced. Hopefully you'll have the engine idling around 450 rpm. Then adjust curb idle speed to actual desired speed (usually around 650 rpm). Set your idle speed slightly high, as when you replace the air cleaner the idle speed will slow slightly down.
they do help a lot...i invested in one of those old fashioned tail pipe sensors that tells me the fuel mixture ... 14.1:1 good to go
Yes I believe it is backwards. With confirmation I will edit the post. Thanks!#5 is backwards... turn right (in)= lean, turn left (out)=rich. isn't it?
either way, follow what it says...
didn't i already suggest that?:idea:just outta curiosity, where is your timing set up? did you rebuild the engine?