I have a 1989 evinrude with a conventional tilt and trim system. I took the motor to a shop and they had done some work to the motor but nothing to do with the trim and all (being it worked before I took it there). When i got it to the house the motor was already all the way down. I can hear the motor trying to make the unit lift but nothing is happening. I can take the motor and lift it all the way up manualy and when i push the trim button up the motor goes down. I have check for leaks and checked the fluid amount but there seems to be no issues. I'm not to formilar with boat motors so im kind of stumped. I have a manual on the motor and have tried the trouble shooting section but still seems not to work. Is there any thing someone could suggest to do. I was trying to find a bleeder valve or something in that region but the only inlet i can find is where to fill with hydralic fluid. Please any recomindations would help! If i need to take pictures of the system I will be more than happy to post them back on here tomorrow.