I assume that you have a conventional packing gland on your boat. If it is adjusted perfectly with good flax then it should drip about 2-3 drops per minute when the shaft is turning and none when the shaft is not turning. I have found that this degree of perfection has usually eluded me. If you get no drips when it is turning then the shaft will likely over heat. If it drips more than this it will probably also drip (at a slower rate) when the shaft is not turning.hayden, i should have mentioned that the water seems to accumulate when the boat is moored so i guess it's not a shaft leak since the engine is not runniing. no?