I would hazard a SWAG that your boat is an early-mid 80's model. Given the probably age this would be a good time (and reason) to overhaul the dewatering systems. Hoses get old and crack/leak. The check valves in pumps lose their flex and ability to seal. Wiring that goes into the bilge area corrodes. And, those infamous Rule float switches simply stop working for no known reason.
Over the last decade I have gone thru all of these systems, and until the evil Forces of Entropy launch another sneak attack, everything works great.
Our boat came with the offshore-rating-standard of a cockpit-mounted manual bilge pump adjacent to the helm. And two separate 12 volt umps for the central bilge -- both are Jabsco 37202- series models. Separate float switches and control panels. And all powered by a larger breaker on the 12 volt distribution panel.
I advocate renewing all hoses about every 20 years (to use a round number). A few years ago the big manual pump would no longer prime and turned out not to be (very easily) rebuildable, and was replaced. One the two ($) Jabsco pumps was replaced. The float switches, OTOH, seem to be sacrificial. And that's in a mostly dry bilge in a fresh water environment.
All this stuff can be labor intensive and occasionally expensive, but look at these systems as part of your 'insurance' plan.
I hope the water that got in did not harm the cabin sole. Or higher up. Yikes...
Speaking of thru hulls, I also have replaced all of the above-water ones aft with SS. I have, over the decades, replaced the original below-water ones with the newer Forespar series 93 composite ones.
