Hi I have a 2003 Glastron SX 195 with a Volvo Penta 5.0 liter. I recently purchased the boat and noticed water in the ski Locker. I opened the cover for the gas tank remove the gas tank and found excessive water in there too. After draining the water out with a cup I noticed there is no drain plug leaving the gas compartment. I am a bit confused should there be? Thank you for your help.