It is important to use ethanol-free gasoline if it will be put up for any length of time. A squirt of Lucas oil will do wonders for easy starting even if left with tank full after 4-6 months. I start mine every month or so, just to have some confidence that they will start when needed on short notice. Of importance also is to learn how to sharpen and maintain a blade. I have the model shown above and with a sharp blade will melt through a 24 inch diameter Live Oak log like a goose processes food.