Icemaker isn't going through full cycle

Ice ejector will bring the ice out of the mold, but stops and will not do a full rotation to eject the ice into the container. In order to get the ejector to move I have to either push the shut off arm back against the ice maker or put it back up to the off position and then bring it down, so the ejector starts moving again. The maker just doesn’t want to do a full cycle, without a little help from me. Do I need a whole new icemaker or is just a simple part going bad?