Boat Parts Labeled Boat Problems?

Boat problems? - boat parts labeled

I have problems to boot. Forester is an engine of 90 horsepower. The problem is that if a departure of the boat, the engine starts to die, and every time I parked it in the future, the engine. I think it's something with the gas tank and gas lines, because if it does not reach seam gas in the right place. I do not know if I'm right. If you think you know the problem on a website or a model of the engine and all parts checked, it would be useful. Thanks ..