Dometic Seastar

Hynautic KS-02 Seastar Seal Kit for K18-K19 Cylinders

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SKU:: KS-02
Condition:: New

DISCONTINUED

Description
Warranty Information

Description

Hynautic KS-02 Cylinder Seal Kit

KS‑02 services K‑18, K‑19, and K‑20 cylinders. Restore gland and piston sealing to stop leaks and regain steering precision.

Compatibility

Fits: K‑18, K‑19, K‑20

What's Included (typical)

Piston seal set & backups
Rod seal & wiper
O‑rings for glands/ports

Hynautic Seal Kit Application Chart

Seal Kit	Fits Cylinder(s)	Year / Variant Notes	Comments
KS-01	K-11, K-12, K-13, K-14, K-15, K-16, K-17	All years	Common inboard/universal-mount rams.
KS-02	K-18, K-19, K-20	All years	Large inboard cylinders.
KS-03	K-02, H-100 / H-1010	All years	For early/universal cylinders (K-02) and H-100 family.
KS-04	K-21 to K-29	Before Aug 1983	Pre‑8/83 design; see KS‑06 for later.
KS-05	K-31, K-33	All years	10" stroke family.
KS-06	K-21 to K-29	After Aug 1983	Post‑8/83 design; check build date.
KS-07	K-10	All years	Factory discontinued; see Rebuild Services.
KS-08	K-7	All years	—
KS-09	K-8, K-9	Before 4/15/1994	Old-style K‑8/K‑9.
KS-10	Legacy / rare	—	Occasional legacy reference; contact Tech Support to cross to KS‑01/others.
KS-11	K-1, PSK-10	All years	See KS‑12 note for K‑1 edge cases.
KS-12	K-2 (a.k.a. K‑2(B)); also K-3/K-4 before 4/15/1995*	See note *	*Some catalogs list KS‑12 for K‑1; KS‑11 is standard for K‑1—verify your gland/bore.
KS-13	K-3, K-4	Primarily pre‑4/15/1994	Where KS‑17 is not specified.
KS-14	K-51	All years	—
KS-15	K-5 / K-5(B)	All years	—
KS-16	Legacy / rare	—	Occasional legacy reference; contact Tech Support for correct cross.
KS-17	K-3, K-4, PSK‑11, PSK‑12	All years	Alternate K‑3/K‑4 kit with PSK coverage.
KS-18	K-8, K-9; HC5806	After 4/15/1994	New‑style K‑8/K‑9; also used on HC5806.
KS-19	K-6 / K‑6‑NI	All years	Often limited availability; rebuild services available.

Tip: Your cylinder model is usually stamped on the barrel or end gland (e.g., “K‑8” or “K‑31”). If you can’t find it, snap a photo and send it to Tech Support—we’ll ID it for you.

FAQs

K‑18 vs K‑20: The seal kit is shared; verify the cylinder stamp before ordering.

General Maintenance Tips

Inspect for ram pitting/corrosion before resealing; deep pitting will damage new seals.
Only use clean MIL‑H‑5606/SeaStar fluid. Keep dust caps on open ports.
After service, bleed thoroughly per Hynautic manual until no aeration.

Questions?

Tech Support: Tech Support Page
Check Stock: Stock Inquiry Page
Request a Shipping Quote: Request Quote Page
About Seatech: About Us

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Seatech Marine Products, Inc. is an authorized dealer and service center

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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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1 Review

1 Review

5
Exactly what was needed

Posted by Karl Kobilke on 24th Jul 2023

Exceptional service, goy shipment out the same day. The only screwup was UPS who took 3 days to deliver a priority shipment.