that 'faulty' bilge pump is probably why it didnt sink after 10 or 15 minutes. maybe it just couldnt keep up with the 'tidal surge'. but bilge pumps are relatively cheap. if you have nay doubt i say replace it. or just add another. couple years ago i was launching my bayliner at the lake for a test run.i had some force 'issues'. while i was trying to get her fired up some guy in a brand new truck with a brand new bass boat that didnt wiegh half wat the mercury 3.0 he had did, started *****in i was in his way. he had some excuse for not wanting tu use launch on other side of pier.said i needed to "get that piece of **** out of everyones way" there was me, him and a guy who had just pulled his rig out. i realy wanted to hold his head under water, just for a little while, but i decided to just paddle to other side of pier.he backed his boat in tied it off and went to park his truck. he stopped to bs with his buddy in other boat who he was apparrently showing off for. as his buddy pulled off he noticed his boat was gone. he came runnin. asked me what happened. i told him while he was being an assss, he forgot his plug. i watched it go under. took maybe 5 minutes. i told him "you need to move that piece of **** before someone tears there boat up on it. icing on the cake, in midst of his insuing tantrum he reached in his pocket for his cell phone and dropped his keys in the watter, just as my rig fired up and team no-bucks pulled off into the sunset