My wife took the mower to the repair guy today. There was a soleniod that is wired to the brake and mower seat for safety features that must engage in order to let gas into the carborator. The solenoid was sticking. He unstuck the solenoid and the mower fired up. There was no charge for this visit. We may have an issue with the wiring or have a gummy or bad solenoid. We now know what to look for if this situation re-occurs.
It appears that spraying cleaner into the carborator wouldn't have helped although that was an excellent suggestion. I was hoping the carborator was no longer gummy after the work that was done to it.
I've liked using the new ramps I built with the ramp ends. It's easier to load the mower into the truck bed than onto a trailer. When using the truck bed, in don't need to chain down the mower like I would need to do when using the trailer. Because of the bend in the ramp boards, I don't sit on the mower when loading and unloading. It's easy to maneuver the HST pedal with one hand and steer with the other hand while standing on the ground.
Obed