James, if you would fill out your signature with a phone number I would be glad to call you and walk you through setting up your system. House rules require everyone to have a signature.
What size hose from tank to the pump?
What size tank bulkhead fitting?
How much water is in the tank when trying to run the pump?
How many gallons per minute is the pump?
I would not use polybraid hose as it will collapse easily when the pump is running and is easy to kink. If the machine is 5gpm or larger I would run 1" hose from the tank to the fitting at the pump, a reducer at the pump is not a problem.
You can have the pressure hose with no gun so it is open just to try the machine to see if any water is flowing but don't run it a long time.
Is the filter going the proper way? Flow arrow pointing toward your unit? And is yellow ball valve opened?
Did you try running the pump for a minute to see if water came out the pressure hose (no gun or anything at the end of the hose, just open)?