On the occasions I find water in my boat, I tend to assume that there is some horrible hole somewhere rather than checking the blindingly obvious. Most recently the obvious has been the cause - phew. So if your O-ring on your bung or hatch seal looks a bit like the image below - you should really be changing it and not blame the boat.
A few pennies later after changing the O ring on the bung (using some laser bailer bands
) and the O ring on the 4 inch RWO hatch
and I was back in business. I hope you find this a useful reminder to check the obvious first. Happy Boat Bimbling!