Last time I had the boat in the water I managed to run over a pot marker that had a load of floating line attached.
Luckily it was only round the lower leg, and not the prop, you can see the paint rubbed off.
When I got the boat out of the water, I found this black tube, with the attachment into the lower leg has broken off.
Any idea what it is? I am rather hoping it is not a gearbox vent,mas that would almost certainly mean I now have water in the gearbox! Not really sure what else it may be?