Dometic HC5370-3 Side Mount Outboard Cylinder — 8" Stroke, 8.3 cu.in.
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You have 30 days to request a return. All sale items are final sale.
Side Mount Steering Cylinder for Outboard Applications
The Dometic HC5370-3 is an 8" stroke, 8.3 cubic inch side mount hydraulic steering cylinder designed for outboard engine installations. Its unbalanced side mount configuration makes it well-suited for shallow splashwells and engines fitted with power steering — delivering reliable, responsive steering control where space is at a premium.
Key Features
- 8" stroke, 8.3 cubic inch displacement
- Side mount (unbalanced) configuration
- 4.8 or 5.7 turns lock-to-lock for precise steering control
- Suitable for shallow splashwell installations
- Compatible with engines fitted with power steering
- Updated ORB (O-Ring Boss) fitting compatible — part number ending in "-3"
Applications
Designed for single outboard engines up to 300 hp, and multiple outboard installations with a combined output up to 600 hp in counter-rotating configurations.
Compatibility Note
This cylinder uses ORB (O-Ring Boss) fittings. Ensure your helm system is equipped with ORB-compatible fittings (e.g. SeaStar HF6009, HF6010, HF6011, or HF6012). Older NPT-based systems are not compatible without upgrading the fittings.
Parts Desk Insights
Best Use Case: The HC5370-3 is the right choice for side mount outboard steering applications where the splashwell depth is shallow or the engine is fitted with power steering. It's a solid upgrade path from older NPT-based cylinders — just confirm your helm lines use ORB fittings before installing. For front mount or splashwell mount applications, see the corresponding Dometic cylinder models.
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.