[header] How to control zebra mussels [title] Run your boat twice a week while it's in water. [step] Run the motor as often as possible to prevent mussels from settling inside it. Take it for a 10 to 15 minute drive to heat up the engine. 
Also try to hit your boat's top speed to shake off younger mussels. [title] Pull the motor out of the water when it is not in use.