PSS Shaft Seal 1-½" Shaft 2-¼" Tube

The PSS Shaft Seal 1-½" Shaft 2-¼" Tube is the marine industry's most trusted mechanical seal for sterndrive and shaft applications, engineered to eliminate water intrusion where the propeller shaft meets the hull. Built for demanding saltwater and freshwater environments, this PSS shaft seal prevents costly bilge accumulation and bearing damage by maintaining a dry engine compartment through thousands of operating hours.

Designed for 1-½" shaft diameter with a 2-¼" to 2-⅜" stern tube fit, this PSS mechanical seal combines a carbon cuff with precision-engineered stainless steel components to handle the extreme pressures and rotational speeds of modern marine powerplants. The compact 9.175" total length (8.175" compressed) allows straightforward installation on inboards, outboards, and jet drives without extensive modifications. Its 3.75" rotor diameter and 3.25" carbon cuff work together to create a dynamic seal that automatically compensates for shaft wear and temperature fluctuations—critical for reliable long-term performance in unforgiving marine conditions.

Serious boaters—whether weekend fishermen, cruisers, or offshore anglers—rely on PSS shaft seals to protect multi-thousand-dollar marine engines from water damage that would otherwise demand costly haul-outs and rebuilds. This seal is the preventative maintenance choice for anyone who runs their boat hard and expects it to start reliably year after year. If your vessel shows signs of water weeping at the stern or exhibits rising bilge levels during operation, upgrading to a PSS mechanical seal stops the problem at its source and restores peace of mind.