If your referring to the float bowl lid screws they are #10-32 tpi. Two at 1/2"length and two at 3/4" length. Run a tap to clean the threads.
Hello Pete. Thanks for the info. Hope you are doing well. 👍👍👍
a light smear of grease on the tap will trap any shavings or crud. its a old trick and it work well in blind holes. and it lubes the tap you can also use rocol paste etc too
Thanks for the lube tip. 👍👍