When antifreeze leaks, it causes various issues, including overheating. Although it might look like smoke, it is steam, which can have a sweet odor. When this part of the engine cracks, the oil or coolant, and antifreeze can mix.Ĭontaminated antifreeze produces smoke when the motor runs due to the combustion process.
If you start seeing smoke in the cabin, your boat’s engine block may have cracks. 7 Is It Possible to Fix a Cracked Boat Engine Block? Visible Engine Smoke
