I amn hopeful that I will recieve my new YF by Friday, so I have to wait to post how it works. On my B I tried to very carefully put a very small bead of Hylomar on the gasket between the halves. Diaster! Despite my best efforts some of the gasket sealer got into the carb. Had to completely disassemble and clean up. I did smear a little on the outside of the carb between the 2 halves, it seems to have stopped the seep on the outside, cosmetic at best, as it doesn't solve the internal problem. I have read somewhere that you can driil and tap corresponding holes in a piece of flat stock, bolt the carb up tight and bake the warp out of the B. Haven't tried that yet!