The Buckshot Racing #77 Piston Rod Cylinder Shaft Assembly is a precision-engineered direct replacement for SeaStar front-mount hydraulic steering systems, designed to restore smooth, reliable steering performance.
Built to meet or exceed OEM specifications, this assembly provides a durable, high-quality solution for worn or damaged steering cylinder shafts commonly found in marine applications.
This component is ideal for maintaining safe, responsive steering control in both recreational and high-performance boats.
Precision-Built for Marine Hydraulic Systems
The piston rod shaft measures 21.75 inches (21-3/4") in length and 0.75 inches (3/4") in diameter, matching standard SeaStar specifications. It is manufactured from marine-grade, chrome-plated cold-rolled steel, offering excellent strength, corrosion resistance, and long-term durability in both saltwater and freshwater environments.
The precision-machined surface ensures smooth travel within the cylinder bore, reducing friction and maintaining consistent hydraulic performance under load.
Integrated Seal Gland, O-Ring, and Bushing Assembly
This assembly includes a center seal gland, high-pressure O-ring, and composite bushing, all pre-installed for proper fitment and ease of installation.
The polymer seal gland is engineered to tight tolerances, creating a secure, leak-resistant interface within the hydraulic cylinder. The marine-grade elastomer O-ring is designed to withstand high hydraulic pressures while resisting compression set and long-term deformation.
A self-lubricating composite bushing is integrated into the assembly to reduce friction between the shaft and cylinder bore. This minimizes wear, improves steering smoothness, and extends the life of the hydraulic system.
Direct Replacement for SeaStar Systems
This piston rod assembly is a direct replacement for SeaStar part number HS5167 and is compatible with a wide range of SeaStar hydraulic steering cylinders, including: HC5345, HC5347, HC5348, HC5358, HC5445, HC6345, HC6750, HC6751, HC6752, HC6753, HC6754, HC6755 and more.
It may also fit additional SeaStar models that utilize a 21-3/4" x 3/4" cylinder shaft, making it a versatile solution for many hydraulic steering systems.
Restores Steering Performance and Reliability
Over time, steering cylinder shafts can develop pitting, corrosion, or wear, leading to fluid leaks, reduced steering responsiveness, or system failure. Replacing the shaft with a properly machined, OEM-spec component restores hydraulic integrity, smooth operation, and precise control.
This is especially important in high-speed and offshore applications, where steering reliability directly impacts safety.
Installation and Maintenance Considerations
During installation, it is recommended to inspect all seals, O-rings, and internal components for wear. Applying proper lubrication during assembly and bleeding the hydraulic system after installation ensures optimal performance and removes any trapped air.
Routine inspection and maintenance following installation will help extend the life of the steering system and maintain peak performance.
Built for Marine Durability
Designed specifically for marine environments, the Buckshot Racing #77 SeaStar Cylinder Shaft Assembly delivers the durability, precision, and corrosion resistance required for long-term use.
Whether you're repairing a worn steering system or performing a full rebuild, this assembly provides a reliable OEM-equivalent solution to keep your hydraulic steering operating smoothly, efficiently, and safely.
For technical support, contact Mike Hill at +1-714-697-1716 or mike@buckshotracing77.com.