The trim works to the best of my knowledge, at least..When i press the trim buttons i can hear it working. I'm not familiar with this style of "engine tilt" set up, but it really doesn't seem to do anything on the water. Ive played with it many times and it doesn't seem to change anything. Not sure how they behave, What happens when it reaches maximum tile in one direction, does it just hit a "lock" and not move any further, or does it continue to move far beyond proper limits? Not sure if I am supposed to just touch the trim bit by bit or hold it for a few seconds.