I press on the primer and no gas goes into the primer. I changed the carb. gasket. I cleaned the hole going to the carb. frome the primer. I am pretty sure the carb. is getting gas from the tank. Also cleaned the vent holes in the gas cap. It is a Techumseh,I got at Sears. [Craftman] It a walk behind mower. The Model # is 917-375511. Any help would be appreciated. Thank You