We fell reasonably sure we know what brand hull that is, and ,if we are correct, they were not known inside the business for their long term construction techniques. A trail of brown water does not always mean a rotten transom, though it does mean there is water in the wood or the hull. Not all brown water is from the wood, and we have seen composite (foam) transoms with colored water. Though in this case we think your father has an issue. We would try removing the rear trim piece and engine bolts, placing the engine on a stand while the transom is allowed to dry. You can leave a hull outside on a very cold night and pull it in a warm to check for moisture as the area with moisture will have a significant temperature difference. Thermal imaging can also be used for sometimes a nominal fee to the effort, and thermal pictures viewed to see the areas. The next step to removing the water is a vacuum pump or rear drainage. As for the transom quality in the rear, that is hard to say. We hope this helps, though our prognosis is not very good. BCB
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