Hey Scott, welcome to the forum. You should find a "cold start solenoid" attached to the demand regulator. It will have two small black wires, these have a history of poor connections and not letting the solenoid open for fuel enrichment on start-up. No rocket science, just take it apart and tighten the terminals. The cold start solenoid is the one with the smaller rubber hose off the tee.
Thanks for the welcome, and speedy reply! I checked both the coil solenoid (larger rubber hose that terminates at the air filter assembly) and the "cold start" solenoid (smaller rubber hose that terminates at the intake manifold) and both solenoids energize when the manual start button is pressed. I even removed both and placed a screw driver in the solenoid shaft and the magnet is definitely working when the start button is pressed. I also disassembled the cold start solenoid to ensure the plunger was moving freely (and it is). Am I missing anything else?