I have a '99 C115 tlrx that I bought new but haven't operated for 2 years. The tilt/trim is acting up. Motor runs in up and down positions, but only trims up about 3 inches, and no pressure from the tilt ram. I have successfully bled the system in the past, but can't seem to get it to fully bleed this time, and think I have a pump problem. The trim rams function slowly going up, properly going down, and the tilt ram not at all. Other symptoms: No leaks; Manual release opens and closes properly, and when closed I cannot raise the outboard manually, but if I manually lift and close the release valve the tilt ram won't hold it up. Any suggestions?