The main problem is the roots that can be 3' long that are like hair and get caught in the water passages in the motor. You can have a good stream of water and there will be no cooling in parts of the motor and your alarm won't sound. If you run in it and make it home FLUSH AND FLUSH your motor. most motors have a place to flush. If not put your cups and turn the pressure up and flush good. you don't want that stuff to dry inside your motor. The day this happened there was a DWLF spray boat tied up at the landing. NOT SPRAING.