PSS Shaft Seal 1-¾" Shaft 3" Tube

The PSS Shaft Seal 1-¾" Shaft 3" Tube is a premier dripless mechanical seal designed to replace traditional packing glands on commercial and recreational vessels. For boaters tired of constant bilge pumping and shaft wear, this system provides a maintenance-free solution that keeps the engine room dry and protected. It eliminates the need for constant adjustment and the mess associated with water-lubricated packing. This specific model is engineered for heavy-duty marine environments where reliability is non-negotiable for long-range offshore trips.

This mechanical seal operates by creating a face seal between a stationary carbon-graphite flange and a rotating stainless steel rotor. The PSS Shaft Seal 1-¾" Shaft 3" Tube utilizes a reinforced bellows that provides the necessary spring tension to maintain a watertight seal even during shaft vibration or movement. With a total length of 9.175 inches that compresses down to 8.175 inches during installation, the unit provides a precise fit within the drivetrain. The 3.75-inch rotor diameter and 3.25-inch carbon cuff diameter ensure a robust contact surface that resists heat and friction.

Owners of mid-sized cruisers and workboats will find the PSS Shaft Seal 1-¾" Shaft 3" Tube highly effective for reducing maintenance intervals and preventing electrolysis damage to the shaft. It is compatible with 1-3/4 inch shafts and 3-inch stern tubes, making it a standard upgrade for many modern propulsion systems. Professional installers prefer this system because it eliminates the scoring of the propeller shaft often caused by traditional packing materials. By maintaining a bone-dry bilge, you increase the longevity of your vessel’s structural components and electrical systems.