Stuck idle mixture screws
- Thread starter jct
- Start date
Joseph James
Senior Member
My understanding is those are factory set and not supposed to be changed. That's according to one of the service videos on YouTube with the little Tech guy.
Send me a pic of both left and right sides of the crab, I think I have a way to remove them.
That's cool, PM me when your ready.
rkrochen
Senior Member
Some of the manufacturers came up with this idea due to all the pollution controls and stated that these should not be adjusted. Problem was they ran like crap as they were set too lean. Depending on which carb and manufacturer some were simply covered by lead plugs whereas others utilized a stopper tab, I am not aware of both on any one carb. If it is utilizing the stopper tab you need to remove the stopper then they will turn. Back in the day we did this all the time when I worked at the dealerships. Need to see pics to know what method was used.
The adjusting screws that were placed behind the lead plugs were never supposed to see the light of day again so they were often not anodized or otherwise protected from corrosion. This resulted in the screw seizing tight to the throttle plate. If they are not too bad, you can try soaking the base plate in some diesel to try and lubricate the screw threads to free them up. A lot of the time, the screws are going to twist off and you will probably need to find a junk carb and raid it for the base plate.
Dave
Dave
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