When Sea Doo just sits in the water, it takes on about 15 gallons of water in 24 hours. It would sink if I left it in any longer. When I run the boat water will pump out. I have looked and felt everywhere I can reach, but cannot find water coming in. I took back to dealer, they said they put boat in test tank for 3 days and no leak. I took it back to lake , drove it 2 miles, then let it sit for 24 hours. 15 gallons of water in the boat. Did not leak putting in test tank, but must start some sort of siphoning as a result of motion across the water.Dealer says they cant fix when they dont find anything broke. PLEASE HELP. (yes, the plugs were in tight.)