I have a 95 hurricane deck boat with a 5.0 Volvo penta outdrive. Just bought the the boat and went to put in water last weekend. It started up fine but when I put in gear to leave dock I heard/felt a clunk noise and prop isn’t spinning but on land it spins like it should. I can turn boat off engage throttle and it’s engaged an not spinning like it’s in gear. I’ve checked linkage for shift cable and it seems to be working in both forward and reverse. Anyone have any ideas on what my problem might be