- - If the bilges are dry with no evidence of "high tide" lines from being flooded than most likely it is equipment
replacement. In the older boats the big equipment was much heavier than the new replacement. I replaced a 40 year old genset weighing 1,000 lbs with a modern (same output) genset that only weighed 400 lbs. I had to move quite a bit of other heavy equipment from the starboard side to the port side to try to balance the boat again. But it still list just a little under 1 degree.
- - As others have said take a thorough look and try to see why it is listing. Also, look at the mast, it might be out of column from a lousy re-rigging job and is causing the boat to list or appear to list. Get a 5 or 6 foot carpenter's level and place it athwartships at the stern - mechanically making sure that it is even with toe rails or deck
edges. Measure to see if the list is in the hull
or in the rigging
. 2 exactly equal strings from the top of a broom pole to the ends of the level and then place the base of the broom pole exactly in the center of the carpenter's level, will give you a true perpendicular to line up with the mast to see if it is in column.