A fuel tank inlet check valve replacement kit is provided. The fuel tank inlet check valve replacement kit is adapted to obviate the need to replace the entire fuel tank when there is a fracture in the inlet check valve. The replacement kit includes a fuel inlet fluidly connected to a body portion thereof. Within a chamber of the body portion a spring-biased check valve may be moveable between an open condition and a closed condition blocking the flow between the body portion and the fuel inlet, wherein fuel supplied through the fuel inlet moves the check valve to the open condition, that is otherwise biased in the closed condition. The chamber has side ports so that fuel flowing from the fuel inlet flows into the fuel tank. Tank seals and a gasket seals the fuel inlet to the tank.