terrific odor
I have a 240 and the first year I left the boat in the water all summer and when I hauled it in the fall, the odor in the tank would knock your socks off. The next year I launched it and put a gallon of cheap clorox down it the tank with a funnel. Opened the valve so that what I added would not overflow and then closed the valve. Let it stay in there all summer. When I pulled the boat out, presto no odor.Note when you pull the boat out in the fall, go straight to the car wash, the kind that takes lots of quarters, while the scum is still wet. It will come off fairly easy. If you wait until it drys then it is real hard to remove. agood coat of wax will help. If you wait and the scum has dried hard, go to the hardware or paint store and buy a can of wood bleach that contains oxalic acid and mix according to instructions. It won't hurt the fiberglass but it sure does CLEAN boats.