How full should use it with the fuel tank on a PWC?

The fuel tank on a Personal Watercraft (PWC) should typically be filled to about 90-95% capacity to allow for fuel expansion and prevent spillage. It's important not to overfill the tank, as this can lead to fuel leaking out of the vent. Additionally, always ensure that the fuel cap is securely tightened after refueling to avoid any fuel loss or contamination. Regularly check the fuel level to ensure optimal performance and safety while riding.