Hupp36, The "Delco" switch on my Series 36 controls the dash lights and has nothing to do with the ignition. I usually run with both the left and right switches on and the double switch off. When shutting down, I turn off one switch, then turn it back on, then turn off the other switch, then finally go back and turn off the first switch to kill the engine. It should continue to run on either side of the ignition although not as well. This tells you that both ignition systems are working. When I first got my '27 Series 36, the prior owner told me it never ran as strong as his other S 36. By checking both ignitions individually, I found out that the left ignition was not working. It turned out the steel resistor on the coil was open. He had never checked each ignition individually. It ran a lot better on both sides.