You might just have debris clogging the limber hole drain. Why not take a fishtape or stiff wire (or similar) and just gently shove it down the hole? You could get lucky. I had an aft compartment with a plugged drain, but was able to use a long screwdriver to break through the blockage and now it drains to the bilge as it's supposed to.
S/V VALIS - PSC 44 #16 - Friday Harbor, Washington
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