Hi - I have a 1974 Irwin 28 I purchased a few months ago. It's now in the water and I can't get the centerboard to drop down. I have checked the cable at the blocks and have free motion at all points. I've tried pulling back moderately on the delrin rod which gave me a slight movement but not much. Since the boat is in the water I'm reluctant to really force the delrin rod - trying to aviod leaks.Does anyone have any suggestions on how to get the board to drop?Thanks, Cal