Have a Johnson Fast strike 150 J150GLEDB ser. number G04140962. The power trim and tilt is very sluggish and sometimes gets stuck in the up position. The seal around the tilt rod has been leaking for some time. Is it possible that the low fluid level is causing this? If not, any other ideas what it could be? Also, does the engine, trim/tilt unit have to be level to add fluid? Thanks in advance for any advice. Steve.