I'm in the process of installing the 9 hp Yanmar diesel in my 20' gaff rigged cutter. There is a space just aft of the engine, under the cockpit sole of about 8 cubic feet which will be inaccessible after the cockpit is completed. However this area might be an excellent location for the exhaust water trap, battery, fuel tank, filters, what not, if there is a feasible way to make the sole removable. The cockpit is to be self draining.
Your thoughts and suggestions (prayers as to whether or not and how to pull this off would be appreciated.