Dometic HH5271-4 SeaStar Helm 1.7 Front Mount (Gen 4)
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
SeaStar Gen 4 Hydraulic Helm — Built for Precision, Designed to Last
The Dometic HH5271-4 is the fourth-generation SeaStar 1.7 cu. in. hydraulic helm pump, engineered for front-mount dash installations on outboard and sterndrive boats. This helm delivers smooth, responsive steering with a robust internal architecture that reduces maintenance and simplifies installation — making it a go-to choice for both new builds and helm upgrades.
Key Features
- Helm rotor supported by 3 roller bearings for smooth, low-effort steering
- Ball bearing piston race for reduced friction and long service life
- Simplified integrated metal construction — fewer parts, greater durability
- Field-replaceable shaft seal — serviceable without removing the helm
- -5 ORB port threads for leak-free hose connections
- Internal pressure relief valve protects the system from over-pressure
- Front-of-dash fill port for easy fluid top-up without disassembly
- Lock valve for positive rudder lock — holds position under load
- Patented bleed tubes and internal air pocket eliminate oil expansion overflow
- Fits 3" round dash hole or retrofits a 4-1/2" square dash hole
- Adjustable O-ring fittings allow reorientation after installation
Parts Desk Insights
Best Use Case: Ideal for single-outboard or sterndrive boats requiring a reliable front-mount helm upgrade. The Gen 4 design is the preferred choice when replacing older SeaStar helms (HH5271 series) — the field-replaceable seal and front-fill port make it significantly easier to service in the field compared to earlier generations. Pair with a compatible SeaStar Hydraulic Cylinder and SeaStar Hydraulic Steering Oil for a complete system. The HP6032 Helm Seal Kit is the correct service kit for this helm. For customers building a full system, see the Dometic HK64004 SeaStar Steering Kit. The lock valve is a key selling point for twin-engine applications where rudder drift is a concern.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.