Using this ARCO marine starter is simple. First, make sure your battery is fully charged. A weak battery can cause damage to the starter and the solenoid, so it's important to keep it in good condition. Also, clean all the connections regularly. Corroded connections can create resistance, which affects the starting efficiency. When installing, follow the manufacturer's instructions carefully. This starter is designed to fit specific Johnson/Evinrude outboard engines with 10-tooth drive gears. For maintenance, since it's nickel-coated and epoxy-painted, it has good corrosion resistance. But still, try to keep it dry as it's sealed to minimize water intrusion. If you have any problems, remember this product can't be returned to the place of purchase. Instead, contact the manufacturer directly. And don't forget, you can get an extra year of warranty by registering your product within 30 days of buying it at arcomarine.com/product-registration.