Oil seals must be kept clean and pliable. Store them properly so they do not become dirty or dry and brittle. Leaky oil seals cannot be repaired. They must be replaced. You can prevent some leakage troubles simply by following proper installation and storage instructions for the seals.
Most manufacturer s technical manuals supply information on the governor.
Inoperative Overspeed Safety Devices Overspeed safety devices are designed to shut off fuel or air in case of excessive engine speed. These devices must be maintained in operable condition at all times. Inoperative overspeed devices may also cause an engine not to start. They may be inoperative because of improper adjustment, faulty linkage, or a broken spring, or the overspeed device may have been accidentally tripped during the attempt to start the engine. If the overspeed device fails to operate when the engine overspeeds, the engine may be secured by manually cutting off the fuel oil or the air supply to the engine.