I have a 2014 Mercury 250 Pro XS. It tilts up and down fine but if i tilt it up and leave it for an hour or more the motor is down. I have checked the seal on the rams and they don't seem to be not leaking at all. I also checked the trim oil, it was just a little low so i added some. Like I said the trim goes up and down great but it just want stay trimmed up.. Any ideas ????????????????????????