Hi Grumpy,

When I pulled the carbie off the tank, there was a rubber gasket betwxit the twain. Top side of the gasket had a hard copper linkage which hooked into a link inside carbie body, the underside had a thin coil spring which was attahced to the gasket and the bottom of the spring sat in a smalll depression on the top of the tank. I just assumed this was a diaphragm.

Yes, the cheapie motor is a 92908. I guess there are thousandds of these around, and nobody would really be interested in my engine or its parts.

Thanks for the tip-off!

Jeff49 (First 4 characters are model designation, last two characters year of production).