If the bellow has a crack...the water will seap in slowly,,,if the seal (silicone), at high pressure hose is gone,,,it will rush in...remove the paddle,,remove the inner and outer brackets,,,pull the pressure hose out as far as possible ,,at the shop,,,to start,,,we tilt the ski up as far as the license plate allows,using our tow motor or pulley,,,etc...,,then we fill the back end with water,,,and wait to see the leak area,,,and then go from there,