Re: 2000 5.7L Mercruiser Tilt / Trim Maintenance
Assuming you had the drive all the way up and built up pressure, then left it that way. Have someone with some weight bounce on the drive while a lighter person holds the down button down.
The check valves can hang when left pressurized.
Next time you put it up, click down for a second to depressurize the system.
Other than checking the oil, have no idea what "Service" meant. Unless he just didn't know what to do.