Just traded a boat has a 135 hp evinrude outboard I think it is an eighties model number has worn off. Problem is this, the tilt&trim is<br />not working when i operate it i can hear the motor working. I put some more hydrulic oil in it <br />which it needed but alas still noting. I asked the guy that I got it off said that the hydrulic rams need to be resealed do you think that could be the problem