Boat Drive Train, Shaft Packing & Stuffing Boxes

Marine Stuffing Boxes and Shaft Seals

Fisheries Supply is your trusted source for marine stuffing boxes, shaft seals, and stern gland components. We understand the critical role watertight drivetrain seals play onboard boats with inboard engines or rudder stocks penetrating below the water line. Our extensive inventory includes products from leading manufacturers like Buck Algonquin and Johnson-Duramax, ensuring you have access to the best solutions for your marine needs.

Understanding Stuffing Boxes

A stuffing box, also known as a packing box, is a device that seals around the propeller shaft where it exits the boat via the shaft log. This prevents seawater from entering the boat. Our stuffing boxes are engineered to handle constant engine vibrations and shaft thrust forces within cramped engine spaces over thousands of hours without failure.

Key Products and Components

PSS Shaft Seal

The PSS Shaft Seal is the most popular selling marine mechanical seal worldwide. This dripless stuffing box is installed as standard equipment by many reputable boat builders and boatyards.
The PSS Shaft Seal eliminates the maintenance, constant adjustment, and cost associated with traditional packing glands. It is 100% watertight, reducing water in the bilge and wear to the propeller shaft. Available for shafts ranging from 3/4” to 6-1/2” (20mm to 150mm), it is a versatile solution for any boat.

Traditional Shaft Seal

A traditional boat shaft stuffing box uses stuffing box packing to create a watertight seal around the propeller shaft. This system prevents water from entering the hull while allowing the shaft to rotate smoothly.

Cutless Bearings

Duramax Johnson cutless bearings are the industry standard in water-lubricated shaft bearings. These bearings support the propeller shaft while allowing it to spin freely. They feature an oil-resistant nitrile polymer lining for durability and reliability.

Additional Components

• Shaft Packing: Essential for maintaining a watertight seal around the propeller shaft.
• Shaft Couplings: Connect the propeller shaft to the engine transmission. Some couplings allow for some degree of shaft misalignment.
• Stern Gland Components: Provide additional sealing and protection for the propeller shaft.

Why Choose Fisheries Supply?

• Wide Range of Products: We stock a comprehensive selection of stuffing boxes, shaft seals, and related components.
• Expert Support: Our representatives are knowledgeable and ready to assist you with any questions or concerns.

When buying boat drive train, shaft packing, and stuffing boxes, you can consider things like:
Water lubrication: A properly adjusted stuffing box will allow a small amount of water to enter the boat to lubricate the shaft.
Packing size: Determine what size packing you need, as flax packing comes in many different cross sections.
Clearance: Clearance between the outside diameter of the shaft and the inside diameter of the stuffing box is critical.

Browse our wide selection of boat propellers.