Using this ARCO marine outboard solenoid is easy. First, make sure your engine is off. Locate the old solenoid in your Mercruiser or Mercury outboard and carefully remove it. Then, install the new ARCO solenoid in its place, ensuring all connections are secure. When using, always keep an eye on the electrical system. If you notice any unusual noises or issues, turn off the engine right away. For maintenance, check the connections regularly to make sure they're tight and free of corrosion. If the solenoid gets dirty, gently clean it with a dry cloth. Remember, this product has a 12 - month warranty, but it can't be returned to the original purchase point. So, if you have any problems, contact the manufacturer directly.