Prop Shaft Leak

[jamrocksailing]

Hi all, we avoided a near disaster today, went out for a quick sail, and then while packing the yacht up in the mooring I always check the bilges. To my shock, they were full up of water.

I discovered the engine prop mounting was leaking and had been probably since we set out from the mooring. The bilges were dry when we set off!

Can anyone offer advice, attached is a pdf with a couple of pictures. There is a shot taken prior and one after the leak, you will notice that a solid metal bracket has turned and you can now see a screen hole in it. The join is where the leak is coming from.

I managed to stop the leak by changing the position slighting by wedging a screwdriver under it but need to of course urgently resolve it but unsure of the problem.

If anyone can offer any solid advice would be great, the yacht is in Kingston Yacht club so no dry dock available other than on the trolley so you cant leave it out the water.

Thanks kindly all and happy new year.