Leaking hatch problem
In part, the answer depends upon if it is leaking on while in a slip or moored or while on a trailer.First, be certain the anchor locker drain is not plugged as the rain gutter for the hatch drains into the locker. The foam weather stripping must be in good shape to make contact with the hatch when its dogged down.If the boat is on a trailer, the pitch of the trailer is critical. I actually use one of the magnetic based angle gages, setting it on the trailer tounge while on the road and spending the night at a campground to insure that the trailer pitch is about 1 degree stern down. More or less will create problems for either the foreward hatch or companionway rain gutters which oppose each other.