Just picked up a 1958 3 hp.Evinrude ducktwin from a friend. It has been three years since he last used it. While looking it over,I found fuel, still in the tank. I removed the carb, and gave it a good cleaning. While trying to start it,I had fuel, and spark. I noticed that, it is not pulling any air in through the carb.I took everything apart again, all the way back to the reed valves, found no problems. The compression is good. Any suggestions ? M/n is 3044 B, s/n B 1535 which I cannot find any reference too. Also the ID tag says made in Belgium.