Bobcat 863 Fuel Issues & Engine Run Away

[9inchaxle]

Just bought this skid steer recently. This is my first chance at trying to get it started. When I purchased it I knew it had starting issues. I found poor flow from the tank when using the bulb. I also found very dark contaminated fuel. I replaced the fuel filter and primed the fuel lines to the filter until their was no air. My fuel supply is a gallon plastic bottle for now. I loosen a high pressure pump nut to see if the system would build high pressure and cranked the engine. It fired a couple of times with dark smoke, so I tighten the fitting and cranked some more. It started and ran at high RPM, Black smoke and would not shutdown, throttle position at idle key off & removed. I tried the manual shutdown lever, no effect. I pulled the fuel line out of my bottle, the engine shutdown in about 5 seconds. I have removed the fuel shutdown solenoid and checked it's movement it extends and retracts the arm. While the solenoid was removed, I moved the manual shutdown lever and can see a vertical stud move back and forth but I can not see or understand how they move anything in the bore. The electrical solenoid linkage does not interfere with the manual linkage. Does any one have a Idea the theory of operation for this? What suppose to move to shut down the fuel?