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Hynautic KS-14 Seal Kit for K51 Cylinders

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SKU:
KS-14
Condition:
New
$95.00
In Stock - Ships Same Day M-F (Order by 5pm EST)

Description

Hynautic KS-14 - Seal Kit for K-51 Cylinder

KS-14 is the genuine Hynautic cylinder seal kit used to reseal the K-51 inboard steering cylinder. Typical contents include replacement O-rings, wipers, backup rings, and retaining wire(s) to reseal one cylinder. Always verify the exact cylinder model and revision before ordering.

Compatibility

  • Fits: Hynautic K-51 cylinder
  • Does not fit: K-31, K-21 to K-29, K-18, K-19, K-11, K-12, K-3, etc. See related kits below.
  • How to confirm: Check the cylinder’s stamped model on the end cap or barrel. If unsure, contact Tech Support with clear photos.

What’s Included

  • Seal and O-ring set for one K-51 cylinder
  • Rod wiper(s) and backup rings as applicable
  • Retaining wire or clip as applicable

Note: Contents can vary slightly by cylinder revision. Reuse of hard parts is expected unless damaged.

Related Hynautic Cylinder Seal Kits

Part No. Fits Cylinder(s) Notes
KS-14 K-51 This page
KS-05 K-31 Fixed mount cylinder
KS-04 K-21 to K-29 (pre-1983) Early cylinders
KS-06 K-21 to K-29 (post 1983) Later cylinders
KS-01 K-11, K-12 Small inboard
KS-02 K-18, K-19 Ball bracket style
KS-13 K-3 (prior to 4-15-94) Older K-3
KS-19 K-6 Limited availability

Install Overview - Resealing a Hynautic Cylinder

This is a high-level overview to help you plan the job. Follow the Hynautic service manual for exact steps and specs.

  1. Prep - Clean the exterior, secure steering, and mark current hardware locations. Protect the rod from scratches.
  2. Disassemble - Depressurize the system. Remove retaining wire(s) and end cap per the manual. Withdraw rod and piston assembly.
  3. Inspect - Check the rod surface for nicks and the bore for scoring. Replace damaged hard parts before reseal.
  4. Reseal - Replace O-rings, backups, and wipers from KS-14. Lightly lubricate seals with compatible hydraulic fluid.
  5. Reassemble - Install rod assembly, seat end cap, and re-fit retaining wire(s). Verify smooth travel by hand.
  6. Bleed and test - Refill, bleed air, and verify full stroke without binding or leaks. Sea trial under safe conditions.

Tip: If the rod is pitted or the bore is scored, a reseal may not hold. Consider our Hynautic cylinder rebuild service.

Downloads and Resources

Description Link
Hynautic Steering System Manual - general reference LINK [PDF]
Inboard Cylinder Installation and Reference LINK [PDF]
Hynautic Cylinder Rebuild Service LINK [Service]

Questions?

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  • FREE Ground Shipping to the Lower 48 States
  • Seatech Marine Products, Inc. is an authorized dealer, service center and installer for Hynautic

International, USVI, Puerto Rican, Hawaiian and Alaskan Customers: We ship worldwide and via USPS. If shipping looks high, contact us for a quote.

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Warranty Information

Seatech Marine Products is an authorized dealer for Dometic that distributes SeaStar Products, this part has a 2 Year Limited Warranty from them. Please visit their website for full details: https://www.dometic.com/en-us/outdoor/support/warranty-statements
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