Hey there! Here's how to use and take care of your ARCO Marine Yamaha replacement tilt trim motor. First, when installing, make sure it fits your Yamaha 2005 - UP 75 HP 4 Stroke or 2005 - UP 90 HP 4 Stroke model. Check that the 2 - wire connection and 4 - bolt mount are secure. Don't forget to put on the included O - ring, coupler, and ring terminal ends. Before starting, clean all the connections. Corroded connections can cause problems and reduce the motor's performance. During use, you can rely on its great features. It's been dynamically tested, so it should work well right out of the box. The motor shafts are hardened at the bearing surfaces, which means they'll last a long time. And the epoxy powder coating protects it from insulation issues. Remember, for leisure use, it has a 12 - month warranty, and for commercial or racing, it's 90 days. If you register your product within 30 days of buying it, you get an extra year of warranty. Just go to arcomarine.com/product - registration. If you have any problems, don't return it to where you bought it. Instead, contact the manufacturer directly.