Using this ARCO outboard starter is easy. First, make sure your battery is fully charged. A weak battery can cause damage to the starter and solenoid. Also, clean all the connections. Corroded connections can reduce the power needed for a good start. When installing, follow the standard procedures for your Yamaha F115 4 - Stroke engine. This starter is designed to fit well and work right away. For maintenance, keep an eye on the nickel - coating or epoxy - paint. If it starts to wear, it might be more prone to corrosion. The sealed design helps keep water out, but avoid long - term submersion. After use, especially in saltwater, give it a fresh - water rinse. Remember, if you register your product within 30 days of purchase on arcomarine.com/product - registration, you'll get an extra year of warranty. And if you have any problems, don't return it to the store. Contact the manufacturer directly.