Use fresh fuel
Modern fuel contains additives, which can evaporate over time, so your petrol will lose its octane. At the end of the boating season, decant any leftover petrol into your car. Don’t store fuel in the boats tanks over the winter, as condensation will form. When you start to go boating again, refill your tanks with fresh fuel. Your engine will start and run more easily, and give a cleaner burn.