David Meeler, Marine Product Information Manager, Yamaha: "Hands down, take care of your fuel. Today’s fuels can begin to degrade rather rapidly, so make sure to add a quality, non-alcohol based marine fuel stabilizer and conditioner to each and every tank, not just before prolonged storage. Yamaha makes a great one. Also, add a quality marine de-carbonizer like Ring Free Plus, in addition to the cleansers that may be in your fuel from the refinery. It keeps out the carbon and cleans your engine from the inside out. Thirdly, install a high-quality, high-efficiency 10-micron water-separating fuel filter. Ten microns is one-twentieth of the diameter of a human hair, so it thoroughly cleans the debris from the fuel and separates any water that may be suspended within from the hygroscopic properties of ethanol. That stuff is in most fuel today, so get out ahead of it and take steps to protect your equipment. Lastly, buy your fuel only at stations that sell a lot of it. You want the freshest gas you can find before you stabilize it."