I was looking at the schematic last night. Can not understand what the reason for powering the start/preheat switch through the regulator...
There must have been a reason, but for now, I would do just what you are asking, power it from the B terminal, see what happens.
Looking at the switch diagram:
Neutral position should be open. No connection between any terminals.
Turning CW would connect 3 to 2, energize only the starter.
Turning part way CCW will connect 3 to 4, energize preheat. Turning it further will energize 3, 1, 4, preheat and starter.
I agree, the switch is defective if it is connecting any terminals at rest.
Just something I observed, the wiring diagram has NO overload protection! You can buy a fuse link at the auto supply. Be a simple solution to add a fuse link to the wire from the battery side of the solenoid that feeds the amp meter.
Long term charging solution, convert it to a one wire Delco alternator. Good luck finding a reliable regulator. If the tach drives off the generator, you can get an alternator with a tach drive.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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