leak

I just got my 1979 Morgan 382 this spring. I love the boat, but like all boats, there are projects. I'm starting to plan how I can tackle a leak in my starboard water tank. The tank doesn't hold water (goes to bilge) and when inspecting I can water the water run out. I have also found a...

Is silicone an acceptable patch for the Speed sensor through hull? Water appears to be seeping in through the threads. The plastic ring securing the speed sensor appears to only have a rubber washer between it and the block. Attached is the over view. It's in the starbird side in the locker...