Using this ARCO Marine tilt trim motor is easy. First, make sure you have a Yamaha early model engine within the specified HP range (70, 90, 115, 150 - 200 HP). Check the 3 - wire connection and 3 - bolt mount to ensure a proper fit. When installing, clean all the connections to avoid any resistance that could affect the motor's performance. For maintenance, regularly check the motor's shaft blade and mounting collar for any signs of wear. Since the motor shafts are induction case hardened, they're pretty durable, but it's still a good idea to keep an eye on them. Also, the epoxy powder coating provides insulation, but avoid exposing the motor to harsh chemicals. If you face any issues, don't return it to the original purchase point. Instead, contact the manufacturer directly. And remember, if you register your product within 30 days of purchase, you can get an extra year of warranty for this rotating electric product.