Collection: Shaft Seals

PSS shaft seals replace traditional stuffing boxes with a face-type sealing system: a carbon graphite rotating ring pressed against a stainless steel collar, eliminating the dripping and packing adjustments that stuffing boxes demand. Two lines are stocked here. The Silicone Shaft Seal suits smaller recreational boats, while the PSS PRO is engineered for larger vessels and heavier duty cycles, covering shaft diameters from 1-1/2 inches up to 3-1/2 inches across a wide range of stern tube sizes.

Selecting the correct seal requires matching two measurements precisely: the propeller shaft diameter and the stern tube inner diameter. Each listing shows both figures, for instance a 2 inch shaft paired with a 2-3/4 inch tube, so measure carefully before ordering. The PRO line handles the larger configurations and suits working boats, long-range cruisers, and hulls where the shaft sees significant angular load. The Silicone line covers standard recreational sailboat and powerboat sizing. As an authorized PSS dealer, Outdoors Marine supplies genuine product backed by the full manufacturer warranty.