APT adjustment

[springl]

Hi All. I have rebuilt my 17085212 Q jet with the help of Cliff's book and kit. I removed the plug above the APT adjustment so I could do the adjustment without disassembling the carb. I found that the APT adjustment access hole also contains an adjustable stop for the full rich position of the metering rods. I haven't found anything that could be screwed into the threads to plug the hole and lock the full rich adjustment. I am also wondering if the full rich adjustment could be set. I have an wideband A/F meter installed so I could tell what affect any changes would make. Check the included picture.

[blazer74]

Remove it and install Allen plug

[springl]

I have not been able to find anything with the proper threads to screw into the carb. Have you actually plugged the hole successfully and if so what did you use?

[Ethan1]

 What about tapping it with a 3/8"-24 taper tap and using an allen head plug?

[blazer74]

Already tapped, should be 3/8 24 plug, idk if it's metric. Don't think so.

[Cliff Ruggles]

I always use the original parts on those carburetors.

I use a fine hacksaw blade to slot the aluminum plug, and drive it back in the threaded metal collar, and it works fine.....Cliff