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The fuel tank stores fuel for your pressure washer, and they come in different sizes depending on the model of your machine. If you want to replace your pressure washer's engine, you might need to find quality pressure washer fuel tank parts. You can find a cap for your diesel washer for as low as $13.95. Whether you need to replace a broken or lost fuel cap or find a new fuel tank, we have a solution for you. We guarantee that you will find a fuel tank accessory to fit your pressure washer's model.