I just got a 1959 R26 that appears to be in good condition. It was running 6 months ago but has been sitting without use since then. I'm gonna change the fuel and oil, and then I would like to try to start it. I just don't know what to do with the tickler...that spring lever on top of the float bowl. Do I hold it down for any certain amount of time...Or do I only push it down at a certain time when I'm starting it?