Originally Posted by
25XS
Using a drill press on your first time is a very good idea. You have much better "depth control" with a drill press. Once the drill drops thru the welch plug, you don't want to plunge into the bottom of the chamber and damage the carburetor main body.
I use an 1/8th inch drill and pop a couple holes about 1/8th inch in from the edge. Then I use a very strong "scratch awl" (booger pick, o-ring pick, sharpened screwdriver, etc...) to pry out the welch plug.
A factory carburetor rebuild kit will include the new welch plugs. Installation does not require any sealant, you simply lay the new welch plug into the hole, support the carb body solidly and use a 1/4" drive socket extenstion and give it a sharp smack with a ball peen hammer to "set" the new welch plug in the hole. You'll get the feel after a couple of them. You don't SMASH IT... Just a small depression in the center will set the new plug.
Tom