I just bought a 28' Rinker curiser/cuddy.. I have had her in the water 3 times this year. I got about 7 to 10 gallons out of the hull when pulling the drain plug this past Sunday. Also the two prior times. The bildge seems to be functioning just fine. But would not pump this water out while on the lake. Is this an large amount of dranage for almost 6 hours. I thinking a old transom seal may be the culprit. Bellows look really good.. Also there is no visable water while looking into the engine compartment. A friend told me that for a 28 footer that should be expected..