PSS PRO Shaft Seal 2-1/2" Shaft & 3-1/2" Tube

The PSS PRO Shaft Seal with 2-1/2" Shaft and 3-1/2" Tube is a professional-grade mechanical face seal designed for demanding marine propulsion systems where reliability and corrosion resistance are non-negotiable. Built on proven stainless steel and carbon sealing components, this seal adds reinforced silicone bellows and a secondary shaft retention collar to deliver extended service life in harsh saltwater environments.

The PSS PRO features 316 stainless steel hose clamps with rolled edges and non-perforated design, eliminating stress concentrations that can lead to fatigue failure. The optional Nitronic 50 rotor upgrade addresses the most aggressive corrosive environments, providing superior material performance where standard stainless begins to show limitations. These specifications translate directly to reduced maintenance intervals and longer intervals between seal replacements—critical factors when your vessel operates in salt spray, brackish water, or extended offshore conditions where galvanic corrosion poses constant risk.

This seal is engineered for vessels that demand performance beyond standard duty—commercial fishing boats, offshore cruisers, and high-use recreational vessels where propeller shaft sealing is critical to engine protection. The 2-1/2" shaft diameter and 3-1/2" tube size fit mid-range displacement engines common in cruising sailboats, trawlers, and fishing platforms. Operators managing older through-hull systems or upgrading from worn OEM seals will find the PSS PRO's modular design simplifies installation while its durable construction justifies the investment through years of trouble-free operation.