Fw: Stuck Air-fuel Mixture Screw

[tch]

T. C. Howery  VMOA #662 ----- Original Message ----- From: tch To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Tuesday, August 29, 2000 9:48 PM Subject: Stuck Air-fuel Mixture Screw Hello all.  I have a 1987 Yamaha YX600 Radian.  All four air-fuel mixture screws were stuck in the carburetors.  I managed to work three out (Grip Doctor from Sears worked great), and put in new ones after applying anti-seize compound (came with my Supertrapps) to the threads -- they now turn freely.  The fourth one though, won't come out even after liberal doses of Gumout with Teflon.  I took it to a local machine shop who drilled a perfectly centered hole through it, but didn't want to go further for fear of ruining the carburetor.   Any recommendations?  Is there a good anti-seize/penetrating lubricant out there that I can use, one that will free-up the threads/melt the matter causing it to stick?  I plan on filling the cavity/recess with it, letting it sit awhile, heating the area with a heat lamp, and then trying an Easy Out.  If that doesn't work, I may have to drill increasingly larger holes until I can either break the (by now very thin) "shell" of a screw, or drill just short of the threads in the carburetor body and pick out the brass.  Thanks.   P.S.  Are there any shops in Michigan that have done this type of work for a VMOA member?   T. C. Howery  VMOA #662