Stuffing box shaft seal4/7/2024 ![]() Now that it’s old and used up, water is filling the bilge, and numbing your mind as you constantly think, “I have to remember to repack that when I have the boat out of the water next time.” ![]() It must be the drip, drip, drip torture you endured all last season as you anxiously watched the old seal leak a little too fast for your liking, the flax packing material having sacrificed itself as it is supposed to do. A dedicated stuffing box wrench with straight jaws, like the one shown, is good at getting into cramped spaces. The beveled glands force packing material against the shaft as the unit is tightened. The stuffing box prevents (most) water from entering the hull while still allowing the propeller shaft to turn. It happens every spring: Right after launching their inboard-engine-powered boats, owners are left wondering why they didn’t repack the engine shaft seal packing gland, also known as a stuffing box, during the off-season.
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