I have a 2 hp Witte that will run for about a minute then die. If I let it set for a while it will run again for a minute. I put a timing light on the plug wire to see if it was losing spark and it was. I changed out the EK mag with a spare and the spare does the same thing. My guess is condenser, but I wanted to hear from the Wico experts before I go and start buying parts. It doesn't matter if I'm running off the tank or carb resivior. This engine ran good a couple of years ago.