Sorry Roncoinc, I did'nt get the picture thing worked out yet. However I picked up a K20-WAT kit from my local dealer, and compared it to the gaskets and diaphragm in the WT-501 carb that I'm going to rebuild, you were right the fuel pump diaphragm that fits this particular carb does'nt use the black neoprene, it uses the white woven type. However the carb originally used a blue plastic style fuel pump but the white woven type is the one that matches the blue plastic in terms of lining up with the holes in the carb, wierd? no blue plastic came in the kit.