Using this outboard solenoid is easy. First, make sure your Mercruiser or Mercury is turned off. Locate the old solenoid and carefully remove it. Then, install the new ARCO solenoid in its place, ensuring a proper connection. Remember, this product has a 12 - month part and labor warranty, but it can't be returned to where you bought it. If you have any problems, contact the manufacturer right away. For maintenance, keep the solenoid clean and dry. Check the connections regularly to make sure they're tight. That's all you need to do to keep your solenoid working great!