A “Hydro-Locked” Engine
Do not attempt to start an engine that has been flooded.
A hydro-locked engine, if it even starts, will quickly destroy itself. If the oil level is abnormally high, water probably got into the crankcase because oil floats on water, making it useless as a lubricant. Remove the spark plugs and turn the engine over by hand to force water out of the cylinders. Blowing compressed air into the spark plug holes and intake also helps. Make sure to drain the oil and replace the oil filter.