Update: I decided to put the boat in the water before doing anything further to the carbs to see if I could "blow out the cob webs". To my surprise, the motor started and ran like normal. I guess the sea foam I put in last weekend did the trick. Perhaps with the sea foam in the line/carbs for a week, it cleaned up what was causing the problem. I don't know but just glad I don't have to tear down the carbs.