DOUBLE "D" & LV

What happens is corrosion in the bushings around the tilt tube. The engine then sticks some. When the trim unit pulls the engine down, the engine jumps down to the ram then stops until the ram pulls on it again. Usually tightenning the tube nut will cause more friction to make the trim unit pull on the engine the entire time. The engine normally would be freely moving so it would rest on the trim ram while it was moving down instead of the ram having to pull it. The quick fix is to tighten or loosen the tilt tube nut. If either does not work, then you will need to look at the bushings. If you need to do something with the bushings, you will need to support the engine with a hoist to be able to remove the tilt tube without the engine falling.