Help! Significant amounts of water enter my right hull during sailing. What's the most common cause? Any tips on methods how to localize the leak?

Willem

The Netherlands

you can get a hair dryer or a vacuum cleaner that blows air to pressurize the hull, then use a wet sponge and soap and look for bubbles. i've had leaks from a crack in the bottom, a drain plug that needed new sealant, and leaks around the pylons. the hull/deck joint and gudgeons are also possibilities