My mower is a Craftmans. Briggs-6.0 H.P. Self-propelled- Model 122K02-0577-E1. I just installed a new Carburetor. It starts, and runs good. I also installed a new primer [hole in primer from Man.] I also cleaned the hole in the primer going to the Carb. But the primer does not work. Why would the primer not work? I know how to put gas in the spark plug hole ,if need be. I know I can make it without the primer, but this bugs me, any suggestions would be appreciated. Thank You