Because the water pump on an outboard engine consist, in part, of a rubber impeller, dry running causes almost instant damage. In as little as 30 seconds the impeller can become unservicable. A run with no water for one minute or longer, in plastic housing applications, begins housing melt down and powerhead/seal damage. It is not good practice to run your outboard without water.
Raise the motor, get out and push the boat to deeper water.
Stop the engine and lift it
stop the engine and lift it
stop the engine and lift it
Stop the engine and lift it.
Stop the engine and lift it
Stop the engine and lift it
Stop the engine and lift it
Stop the engine and lift it
Stop the engine and lift it
Stop the engine and lift it
Stop the engine and lift it