Pull the four screws under the head, and then remove the top of the motor with the indicator. Line up your arrow with the prop, and then gently replace the top and screws. It will fix it until it gets out of whack again. If you turn it too many times by hand without disassembling the top, you will strip the plastic gears, and it will never stay straight. When you pull the top, you will be able to see how the alignment gears work. There are some adjustments that can be made, and you can even bend a few brackets to make it stay straight longer. BUT, this will be a constant battle. After you do it the first time, you will be able to realign in less than a minute.