Continuing with the work on my daughter's Ovation, I pulled the carb to clean, inspect, etc as it's a new sled to us. The choke/enrichener cable was stuck when we pulled everything off and it appears that the plunger in the carb is what's stuck. I unscrewed the brass piece from the top of the carb but the plunger won't pull out. Am I missing something? We've had it soaking with penetrating oil for a few days but no go yet. Hopefully it's something simple that I've missed. Thanks for any help.