What are the causes of white smoke from small gasoline engines?
1 Answers
The main cause of white smoke from small gasoline engines is the entry of coolant into the cylinder. Below is an analysis of related causes and solutions: 1. High water content in fuel: The fuel-water separator fails to remove water from the fuel. In this case, the water-containing fuel burns in the cylinder, producing large amounts of unburned hydrocarbons and water vapor, resulting in white exhaust smoke. Solution: Regularly check the fuel-water separator to ensure it is functioning properly and promptly remove any separated water. 2. Coolant entering the cylinder: Coolant may enter the cylinder due to damage to the cylinder liner or gasket. When coolant mixes with fuel and burns under high temperature and pressure, it produces a large amount of water vapor, leading to white smoke upon exhaust. Solution: Carefully inspect the cylinder liner and gasket for cracks or damage and replace them if necessary. 3. Faulty fuel injector: Normally, fuel in the engine cylinder burns in an atomized form. If a fuel injector in one cylinder malfunctions, the fuel it sprays may form droplets. When mixed with air and compressed, the temperature rises, causing the fuel to vaporize without burning, resulting in white smoke. Solution: Use the cylinder cut-off method to identify the faulty injector and replace it.
