The reasons why the parking generator cannot be pulled by hand are as follows:
1. The spark plug is damaged: Use a multimeter to check the resistance value between the two spark plug wires. The resistance value should be between 0.6 and 1.2 ohms. Otherwise, within this range, the spark plug must be replaced.
2. Radiator overheating: If the radiator is overheated and the radiator and defroster are not hot, there may be foreign objects stuck in the circulation pipeline. The pipe is bent.
3. Water pump failure: There is gas in the circulating water circuit. The water inlet and return valves do not open, the engine thermostat is opened too early, etc. Find out the reasons and carry out corresponding repairs.