D Winn,

This is one of those topics folks disagree on. Some will run one gasket while others run two. I'm not sure what the book says...maybe the fellow at the parts store is correct.

The crux of the matter is, 'no leaks allowed'. However many you run, be sure the notch in the insulator (if it has one) and the little notch in the gasket are positioned under the small port in the carburetor base.

Stuart