I learned something new, that is the shut off switch for the engine you are talking about. It's right there in the Deutz manual; thanks. I'll get the numbers off of those glow plugs for ya. There are several Deutz retail/repair shops around here, because this is a large farming region where I live, so these engines are used allot. They are the manual type where you need to count the seconds. Someone told me that using the plugs for 30 seconds is okay, but mine works fine if I hold it for 15 seconds. The engine starts in our really cold weather down here without the plugs, but it smokes allot at first and runs on one cylinder for a moment or two.
That plug I was pointing to kills the power to the fuel solenoid, which is that loud click you hear when you first turn the key on, but from now on I'll use that lever you were telling me about.
That air gun from the 50's is probably a much better quality than this thing, haha! It works well though.