Diesel in a gas lawn mower engine?

No. Diesel fuel should never be used as a substitute for gasoline in a gas lawn mower engine. Gas lawn mowers utilize specially formulated gasoline for their combustion process, as it ignites more easily compared to diesel fuel. Besides ignition issues, diesel fuel can significantly damage the internal components of the engine, including pistons, piston rings, and fuel injection systems. Diesel fuel has a higher lubricity than gasoline, which can interfere with the proper lubrication of the engine's moving parts. It can cause excessive wear and tear on fuel lines and seals due to its higher density and slower evaporation rate. It is strongly recommended to strictly adhere to the manufacturer's guidelines regarding fuel requirements for your gas lawn mower engine to avoid severe damage and ensure safe and efficient operation.