Generally, no, small planes do not have fuel dump systems. Unlike massive wide-body jets, which often have a "Maximum Takeoff Weight" (MTOW) significantly higher than their "Maximum Landing Weight" (MLW), small general aviation aircraft like a Cessna 172 or a Piper Archer are designed to be able to land at the same weight they took off. In an emergency, a small plane can simply return to the airport and land immediately without needing to lose weight. Fuel dumping is a specialized hardware feature found on large aircraft to prevent structural damage to the landing gear or airframe during an overweight landing. On the rare occasion that a small plane needs to reduce weight or fire risk before a forced landing, the pilot's only option is to fly in circles to burn the fuel off or, in extreme cases, "drain" the tanks through the sump valves if accessible, though this is not a standard or safe procedure. For most light aircraft, the complexity and weight of a dedicated fuel dump system are simply not justified by the physics of their flight operations.