Idle air screw hole...

[Larry D]

The tip broke off in my #4 carb....BS32SS.

I've got a "new" one, so, no problem there. Thanks again Steve.

I've tried to get it out. No luck and don't want to bugger up the hole. I'm searching around town for a machine shop that can drill it out for me at a reasonable cost so I can eventually pass it forward. No need to tell me all the tricks to get it out...I've tried 'em.

I'm going home tonight and measuring the tip end of the new air screws I have with a digital caliper. But thought someone may know for sure.

So, does anyone have an idea what diameter that teeny tiny hole is ? I'm guessing it's in the .15-.20mm range. Anybody know for sure ?

Thanks

[Larry D]

Well, I was way off with my guess.

After measuring the very end of the tip of a couple of the air screws, I came up with .8mm.

[chef1366]

Send it to me, I'll get it out.
Dremmel off the tunnel leading to the screw head. Cut a notch into the screw, add PB Blaster and heat it up. It'll come out.

[Larry D]

Send it to me, I'll get it out.
Dremmel off the tunnel leading to the screw head. Cut a notch into the screw, add PB Blaster and heat it up. It'll come out.

The screw is out. It's the tip that's set into the teeny tiny hole. And I mean set hard ! I tried to take and sewing needle and pop it out from inside the carb throat, but, in my infinite wisdom, managed breaking it off the needle from the inside.
I see no other way than to drill it out. I've boiled, heated slowly with a torch, PB blasted, cursed a few times, etc....
As I said, I've since got another carb, but, would really like to save this one.
I work at an excavating company that has a fantastic machine shop, but nothing that would work on something this small. I have my feelers out between family and friends. Hopefully, I'll find a "hookup" from someone that will do it inexpensively enough to make it cost effective.