---
product_id: 19280823
title: "Dometic SeaStar Outboard Steering Cylinder, HC5370-3, Side Mount"
brand: "seastar"
price: "13870 DH"
currency: MAD
in_stock: true
reviews_count: 7
url: https://www.desertcart.ma/products/19280823-dometic-seastar-outboard-steering-cylinder-hc5370-3-side-mount
store_origin: MA
region: Morocco
---

# 600 HP max power Stainless Steel ORB fittings ABYC & ISO certified safety Dometic SeaStar Outboard Steering Cylinder, HC5370-3, Side Mount

**Brand:** seastar
**Price:** 13870 DH
**Availability:** ✅ In Stock

## Summary

> 🌊 Steer with confidence — power, precision, and protection in every turn!

## Quick Answers

- **What is this?** Dometic SeaStar Outboard Steering Cylinder, HC5370-3, Side Mount by seastar
- **How much does it cost?** 13870 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/19280823-dometic-seastar-outboard-steering-cylinder-hc5370-3-side-mount)

## Best For

- seastar enthusiasts

## Why This Product

- Trusted seastar brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Certified Safety & Quality:** Built to meet ABYC and ISO standards, guaranteeing reliable and secure steering for your vessel.
- • **Powerful Precision Steering:** Handles up to 600 HP in twin counter-rotating setups for ultimate control on the water.
- • **Versatile Side Mount Design:** Ideal for center console fishing boats and cruisers, compatible with SeaStar Power Assist Pump for enhanced fingertip control.
- • **Smooth & Responsive Handling:** Unbalanced cylinder with 4.8/5.7 turns lock-to-lock delivers a natural, automotive-like steering feel.
- • **Corrosion-Resistant Durability:** Premium stainless steel O-Ring fittings ensure effortless hose routing and long-lasting performance in harsh marine environments.

## Overview

The Dometic SeaStar HC5370-3 Side Mount Outboard Steering Cylinder is a top-tier hydraulic steering solution designed for single and multiple outboard engines up to 600 HP. Engineered with corrosion-resistant stainless steel fittings and certified to ABYC and ISO standards, it offers smooth, responsive steering with 4.8/5.7 turns lock-to-lock. Perfect for center console fishing boats and cruisers, it supports advanced power assist options and is built to withstand harsh marine conditions, ensuring reliable performance and safety on the water.

## Description

One of the top selling recreational marine hydraulic cylinders for outboard powered boats from the leader in marine steering technology, SeaStar Solutions (formerly Teleflex Marine). The HC5370-3 Side Mount Outboard Steering Cylinder offers an alternative to a front mount cylinder. This unbalanced cylinder is 4.8/5.7 turns lock-to-lock and is for single and multiple outboard engine installations with total power to 600 HP in counter rotating application. The HC5370-3 meets ABYC and NMMA certification standards and is designed and manufactured in North America. It is also compatible with SeaStar Power Assist Pump (PA1200-2) which provides an automotive feel to driving your boat with fingertip control. This cylinder is ideal for center console fishing boats and cruisers containing single and multiple outboard engine installations with total power to 600 HP in twin counter rotating application. Not recommended for boats that exceed 75 MPH or run surface piercing props or the power exceeds the maximum Coast Guard rating for the vessel. Don't use this cylinder if the engine is highly elevated on the transom or if engine trim tabs have been removed. This cylinder is not to be used with SeaStar PRO helm pumps. Upgrade Options to Consider: • Stainless Steel Bulkhead Hose Fittings • Tilt Steering • SeaStar Power Assisted Steering SeaStar products are backed by a two-year recreational user warranty against manufacturing defects. SeaStar hydraulic steering systems are tested and certified using only SeaStar hydraulic fluid and SeaStar hydraulic hoses. Use of non-certified products to install SeaStar products may void warranty and could cause loss of steering control.

## Features

- Built and certified to meet safety & quality requirements established by the American Boat & Yacht Council (ABYC) and International Standards Organization (ISO)
- Positionable Stainless Steel O-Ring (ORB) Fittings for easy hose routing and suitable for installation in shallow splash wells. State of the Art Proprietary Sealing System offers superior resistance to repeated compression set and is designed to better withstand the harsh environment
- Unbalanced cylinder with 4.8/5.7 turns lock-to-lock
- For single and multiple outboard engine installations with total power to 600 HP in counter rotating application
- For Outboard Use ONLY

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SeaStar |
| Item Weight | 3.9 Pounds |
| Color | One |
| Material | Stainless Steel |
| Engine Type | 4 Stroke |
| Operation Mode | Electric |
| Recommended Uses For Product | For Fishing Boats, For Salt Water |
| Voltage | 12 Volts (DC) |
| Mounting Type | Engine Mount |
| Maximum Horsepower | 6E+2 Horsepower |
| Manufacturer | SEASTAR SOLUTIONS |
| UPC | 731957902719 |
| Global Trade Identification Number | 00731957902719 |
| Item Package Dimensions L x W x H | 24 x 5 x 5 inches |
| Package Weight | 2.27 Kilograms |
| Item Dimensions  LxWxH | 15.25 x 4 x 3.25 inches |
| Brand Name | SeaStar |
| Country of Origin | Canada |
| Warranty Description | limited warranty |
| Model Name | SeaStar Cylinder 125-8 Side Mount O/B |
| Suggested Users | unisex-adult |
| Number of Items | 1 |
| Part Number | HC5370-3 |
| Included Components | SeaStar Cylinder 125-8 Side Mount O/B |
| Size | Medium |

## Product Details

- **Brand:** SeaStar
- **Item Weight:** 3.9 Pounds
- **Color:** One
- **Material:** Stainless Steel
- **Engine Type:** 4 Stroke

## Images

![Dometic SeaStar Outboard Steering Cylinder, HC5370-3, Side Mount - Image 1](https://m.media-amazon.com/images/I/31YmflnHWsL.jpg)

## Questions & Answers

**Q: Will this replace the sea star HC5370-71? It’s over 20 years old**
A: it will replace the sea star HC5370-71 .  That was the same model that I had to replace .

**Q: What is included with the purchase of the side mount cylinder?**
A: Hi, this is all the information that the catalog gives. The item comes sealed from the factory but if I am not mistaken the fittings are inside. This cylinder is suitable for installation in shallow splashwells and use onengines fitted with power steering.• This unbalanced cylinder is 4.8/5.7 turns lock-to-lock.• Typical applications include center console fishboats and cruisers.• For single and multiple outboard engine installations with total power to600 HP in counter rotating application.• Note: Not for use with SeaStar Pro helms.Thanks, JW Marine

**Q: How does cylinder mount to splashwell?**
A: It mounts to the outboard motor itself by screwing on the the tube style mounts found on the front of many outboards.

**Q: Can this product be use to replace cable on mercuiser**
A: don't think so

## Customer Reviews

### ⭐⭐⭐⭐⭐ Outboard steering piston
*by J***L on March 16, 2025*

Great replacement part

### ⭐⭐⭐⭐⭐ worked great
*by S***O on August 30, 2023*

easy install

### ⭐⭐⭐⭐⭐ Fast delivery
*by G***R on March 24, 2021*

Fast Delivery! It also include helm filler hose and helm filler plug. Very nice!

## Frequently Bought Together

- Dometic SeaStar Outboard Steering Cylinder, HC5370-3, Side Mount
- Dometic Seastar 1.7 Helm, HH5271-3, Front Mount
- Dometic SeaStar Hydraulic Steering Fluid, HA5430H, 1 Quart

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**Shop now:** [https://www.desertcart.ma/products/19280823-dometic-seastar-outboard-steering-cylinder-hc5370-3-side-mount](https://www.desertcart.ma/products/19280823-dometic-seastar-outboard-steering-cylinder-hc5370-3-side-mount)

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*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-20*