The fuel filter is connected to the tank and allows the engine to feed fuel. If the fuel mixture is not filtered correctly and applied, it can cause a decrease in performance. To fix this, check the fuel consumption, ensure the fuel oil is of the right quality, and that the mixture is just right. You can also apply fuel cleaner or gasoline, wait for some hours and then clean the filter. If there are still signs of damaged lines or brittleness, replace the new filter.