Installed the Ignition Switch (A-510-5K) with only 3 positions. I will have no starter and separate battery/alternator Switch. I checked the function of the switching itself to make sure it's set up correctly. In the "Off" pos. it closes both ignition circuits by grounding them. The C-90 8F is suppose to quit if the ignition key is turned to the off detend! An important thing when handproping.....