I have a 2005 Yamaha 115 4 Stroke. I need to remove the power trim assembly in order to change a few seals. All the oil has run out of the power trim and I'm sure it has air in the system. The problem that I have is that I can not lift the motor to lock it in place. I have opened the pressure relieve valve but it still will not budge. Any ideas on how to remove the power trim with the motor all the way down?