Description
SeaStar HK7500-4 PRO Hydraulic Steering Kit
The Dometic SeaStar HK75004 PRO Hydraulic Steering Kit is the high performance outboard steering package built for single non power assisted outboards up to 350 HP on fast bass boats, flats boats, center consoles, and race or ski hulls. This kit pairs the SeaStar PRO helm with the PRO front mount cylinder for a firm, precise steering feel at speed.
High Performance PRO Kit
Single Non Power Assisted Outboards
Built for high speed bass boats, flats boats, center consoles, and performance hulls that need tighter steering feel and reduced play.
Hose Sold Separately
Choose PRO Hose Length
The HK7500-4 kit does not include hoses. Add HO57XX or HO69XX SeaStar PRO hose separately, with optional stainless fitting upgrades.
Technical Specifications
Helm Displacement
2.0 cu. in.
System Rating
1500 PSI
Approx. Turns
4.25 L-L
Shaft
3/4" Tapered
Included helm HH5770-4 SeaStar PRO front mount helm pump with ORB-5 ports and repositionable fittings for 1500 PSI systems.
Included cylinder HC6345-3 SeaStar PRO front mount cylinder with keyed support bracket, larger pivot bushings, and stainless ORB-5 hose fittings.
Cylinder dimensions Approx. 8.0 inch stroke, 1.375 inch bore, and about 8.34 cu. in. of fluid volume.
Dash / helm footprint Compact PRO helm with a 3 inch dash cutout and standard 3/4 inch tapered steering shaft.
Hose type Use SeaStar PRO hose only - HO57XX or HO69XX Kevlar reinforced hose assemblies sized for your specific run length.
Performance focus Designed for high speed performance hulls, jack plates, and performance propellers when installed to SeaStar guidelines.
Product Specifications
| Part Number | HK7500-4 |
|---|---|
| Product Type | SeaStar PRO hydraulic steering kit |
| Primary Use | High performance single non power assisted outboards |
| Included Helm | HH5770-4 |
| Included Cylinder | HC6345-3 |
| Included Fluid | 2 x HA5430H SeaStar hydraulic steering fluid |
| Fill / Bleed Kit | HA5438 |
| Warranty | 2 Year Limited |
| PRO Hose Options | HO57XX (HO69XX) |
| Replacement For | HK7500 / HK7500A-3 / HK7516 etc. |
SeaStar PRO Performance Built for high speed outboard applications that demand tighter steering feel, reduced wheel play, and stronger system components.
1500 PSI PRO Rated Uses the PRO helm and PRO cylinder package for higher performance hydraulic steering compared to standard SeaStar kits.
Jack Plate Friendly Suitable for performance propellers and jack plates when the complete installation is sized and rigged correctly.
What’s Included in the HK7500-4 Kit
| SeaStar PRO Front Mount Helm Pump, 2.0 cu. in. | HH5770-4 - PRO front mount helm for 1500 PSI systems, approx. 4.25 turns lock to lock with the PRO cylinder, 3 inch dash cutout, 3/4 inch tapered shaft, and ORB-5 ports. |
|---|---|
| SeaStar PRO Front Mount Outboard Cylinder | HC6345-3 - balanced PRO front mount cylinder with keyed support bracket, heavy duty shaft, pivot bushings, and stainless ORB-5 hose fittings. |
| SeaStar Hydraulic Steering Fluid | HA5430H - two quarts for filling and bleeding the system. |
| Fill and Bleed Kit | HA5438 - bottle adapter and fill / bleed hardware with installation instructions. |
| SeaStar PRO Hose | For an extra cost - add HO57XX or HO69XX hose separately based on your required run length above. |
Recommended Applications and Limits
| Single Outboard | Up to 350 HP (non power assisted) for bass, flats, bay boats, center consoles, and performance ski or race style boats. Primary SeaStar PRO application. |
|---|---|
| Twin Outboards | Up to 700 HP combined (non power assisted) when approved and rigged with the required tie bar kit and correct additional hardware. |
| Dual Station | A second PRO helm, hoses, and fittings can be added for upper / lower helm installations within the same overall application limits. |
| Typical Speed Range | Commonly selected for boats capable of speeds above 65 mph when installed within SeaStar guidelines. |
Will This Kit Work on My Boat?
| Resource | Link |
|---|---|
| SeaStar Front Mount Cylinder Application Guide | Open Guide |
| Dometic SeaStar Hydraulic Parts Lookup | Open Lookup |
| SeaStar Hydraulic Steering Selection Guide | Download PDF |
| Tech Support | Contact Tech Support |
Dimensions and Mounting Diagrams
SeaStar PRO Cylinder Dimensions
Click to enlargeHow to Measure SeaStar Hose
Click to enlargeSeaStar PRO Helm Dimensions
Click to enlargeDownloads and Resources
SeaStar Front Mount Outboard Cylinder Installation Manual
Download PDFHelm Pump Installation Manual
Download PDFSeaStar Front Mount Cylinder Fill and Bleeding Instructions
Download PDFDometic SeaStar Warranty Sheet
Download PDFSeaStar Hydraulic Steering Selection Guide
Download PDFDometic SeaStar Hydraulic Build Guide
Open ToolRelated Products and Spare Parts
Frequently Asked Questions
Does the HK7500-4 kit include hoses?
No. The HK7500-4 kit does not include hoses. Add SeaStar PRO hose separately in the length you need, using HO57XX or HO69XX hose assemblies.
What comes in the HK7500-4 kit?
The standard kit includes the HH5770-4 PRO helm pump, HC6345-3 PRO front mount cylinder, two quarts of HA5430H steering fluid, and the HA5438 fill and bleed kit.
What does this kit replace?
The HK7500-4 is the updated -4 generation replacement for earlier HK7500A, HK7500A-3, HK7516, HK7518 etc. kit versions and uses the newer -4 PRO helm design.
Is this kit for power assisted engines?
No. This kit is positioned for non power assisted outboard applications. If your boat has a different steering or assist configuration, confirm the setup before ordering.
Can this kit be used on twin outboards?
Twin engine applications require additional SeaStar components such as the proper tie bar kit and correct application approval. Contact us before ordering for a twin outboard setup.
Will it work with jack plates and performance propellers?
Yes, this is one of the primary reasons customers choose SeaStar PRO, but the complete system still has to be rigged correctly and matched to the specific boat, engine, and performance setup.
Questions? We can help.
Why Buy From Seatech Marine Products?
No Sales Tax Outside California Orders shipping outside California are not charged sales tax.
Buy Now, Pay Later Financing options are available with PayPal Pay Later and Affirm for qualifying purchases.
FREE FedEx Priority Overnight Free FedEx Priority Overnight shipping to the lower 48 states, with USPS Priority Mail options for AK, HI, USVI, and Puerto Rico.
Authorized Dealer and Service Center Seatech Marine Products, Inc. is an authorized dealer, hose manufacturer, and service center for Dometic Marine hydraulic steering products.
SeaStar PRO Cylinder Dimensions
SeaStar PRO Helm Dimensions
How to Measure SeaStar Hose
Warranty Information
Seatech Marine Products is an authorized dealer for Dometic whom 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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