Initially when this started the starter motor would spin, but not engage with the flywheel. A couple of time it did engage but did not have the power to turn the flywheel. I did a direct test using an external battery hooked directly to the starter and the starter operated normally so there is no problem with the starter itself it is just the power going to it. My concern with the trim (not necessarily the motor) is that both the starter and trim stopped working at the same time. I find it hard to believe that they are separate problems. Too much of a coincidence. That is why I thought the problem might be with the grounding, but the grounding seems to be fine. I feel that the problem with the starter is the same as with the trim.