SeaStar HS5157 Front Mount Cylinder Seal Kit for HC5340-HC5445 and HC6750-HC6755 Cylinders

The SeaStar HS5157 is a front seal kit for SeaStar pivot and front mount hydraulic steering cylinders. It restores the sealing surfaces inside the cylinder that wear over time from normal steering use, water intrusion, and age, which can lead to hydraulic fluid leaks, spongy steering feel, or loss of steering pressure. The kit includes two metal, round seal glands, a pin wrench, and a seal gland assembly guide tool, giving an installer everything needed to remove the old glands and seat the new ones correctly without damaging the O-rings during assembly.

HS5157 is designed for SeaStar front mount cylinders including the HC5340, HC5341, HC5342, HC5343, HC5344, HC5345, HC5346, HC5347, HC5348, HC5358, HC5365, HC5375, HC5394, and HC5445 series, as well as the HC6750 through HC6755 series. This covers threaded-end-gland cylinders, pivot cylinders (including Honda 115-130 and OMC-specific applications), and compact cylinders. A related kit, HS5167, uses the same seal glands and guide tool but ships without the pin wrench, so buyers who already own a wrench or prefer to source one separately have that option under a different part number. Always confirm the cylinder model number before ordering to be sure the correct seal kit is selected.

Specifications

• Brand: SeaStar
• Manufacturer Part Number: HS5157
• Product Type: Front Mount Cylinder Seal Kit
• Included Components: 2 Seal Glands, Pin Wrench, Seal Gland Assembly Guide Tool
• Material: Metal
• Shape: Round
• Weight: 0.53 pounds
• UPC: 731957806277

Fitment

• SeaStar front mount cylinders: HC5340, HC5341, HC5342, HC5343, HC5344, HC5345, HC5346, HC5347, HC5348, HC5358, HC5365, HC5375, HC5394, HC5445
• SeaStar front mount cylinders: HC6750, HC6751, HC6752, HC6753, HC6754, HC6755

Frequently Asked Questions

What is included in the SeaStar HS5157 seal kit? HS5157 includes two seal glands, a pin wrench, and a seal gland assembly guide tool, everything needed to reseal a SeaStar front mount steering cylinder.

Which SeaStar cylinders does HS5157 fit? HS5157 fits the HC5340, HC5341, HC5342, HC5343, HC5344, HC5345, HC5346, HC5347, HC5348, HC5358, HC5365, HC5375, HC5394, and HC5445 front mount cylinders, along with the HC6750 through HC6755 series.

Does HS5157 include a pin wrench? Yes, the pin wrench is included in HS5157. A related kit, HS5167, contains the same seal glands and guide tool but ships without the wrench.

What material are the seal glands made of? The seal glands in the HS5157 kit are metal and round in shape, matching the OEM gland design used in SeaStar front mount cylinders.

How much does the HS5157 seal kit weigh? The HS5157 front mount cylinder seal kit weighs 0.53 pounds.

Is HS5157 compatible with the HC5347 pivot cylinder used on Honda outboards? Yes, HS5157 is compatible with the HC5347 pivot cylinder, which is used in Honda 115-130 horsepower applications.

Is HS5157 compatible with the HC5348 pivot cylinder used on OMC outboards? Yes, HS5157 is compatible with the HC5348 pivot cylinder, an OMC-specific pivot cylinder application.

Can HS5157 be used on a SeaRay compact cylinder? Yes, HS5157 fits the HC5394 SeaRay compact cylinder in addition to the other listed front mount cylinder models.

What is the difference between HS5157 and HS5167? HS5157 and HS5167 use the same two seal glands and guide tool, but HS5157 includes a pin wrench while HS5167 ships without one.

Why would steering feel spongy or leak fluid on a SeaStar front mount cylinder? Worn seal glands inside a SeaStar front mount cylinder like the HC5345 or HC5445 can allow hydraulic fluid to leak past, causing spongy steering or pressure loss; the HS5157 kit replaces those glands to restore proper sealing.

Is a special tool needed to install the HS5157 seal kit? The HS5157 kit includes its own pin wrench and seal gland assembly guide tool, so no additional specialty tools are required to install the new seal glands.

Is HS5157 a genuine SeaStar part? Yes, HS5157 is the SeaStar manufacturer part number for this front mount cylinder seal kit.