Ok, so I had the boat out this weekend and everything seemed to be working just fine. However when I pulled the boat out, the motor did not seem to want to go all of the way up. Once I got it out, I couldn't trim the motor down to rest on the MotorToter. I could hear the trim motor spinning, but no movement. I tried to push the motor down while my son activated the trim switch, but it wouldn't budge. I haven't had the chance to investigate yet, but does this sound like it is just low on trim oil? How often does this oil need to be refilled?