My buddy brought his jet ski over for me to clean the carb. Sat for 8 years. It would run on starting fluid then die. He tried everything. He took the carb off then I looked inside, clean as a whistle. He looked at the filters and he tried sucking on the fuel line, nothing. I looked in the front hatch and the fuel lines went to something on the underside of the body. I looked outside, yep fuel shutoff. I turned it he got a nice drink of gas, dang. He spit gas and sprite all over the yard. Guess what, it runs now. Dang, I'm good.
