Propulseur externe poupe SX50/140 50kg 12V — Sleipner SX50/140-12V-50MM-2

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Sleipner

SX50/140-12V-50MM-2

Sleipner SX50/140 50kg 12V External Stern Thruster

Designed for boats from 8 to 11 meters, the Sleipner SX50/140 stern external thruster delivers 50 kg of thrust (at 10.5V). Its Q-PROP™ propeller reduces noise, while intelligent power control ensures precise maneuverability and enhanced protection. Its one-piece aluminum design and simplified external installation without GRP work (up to 50 mm hull thickness) make it an adaptable and durable solution.

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Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Fuse rating	400
Max Operating Speed External Mount	10
Motor Power	3.3
Operating voltage	12
Remote Control Compatible	Yes
Variable Speed Control Compatibility	Compatible with PRO upgrade

Detailed description

Designed to optimize maneuverability for vessels from 8 to 11 meters (27 to 37 feet), the Sleipner SX50/140 50kg 12V external stern thruster delivers 50 kg of thrust at 10.5V, reaching up to 62 kg at maximum. This 12V DC thruster provides 2.8 kW (3.7 hp) of power with a 140 mm tunnel internal diameter.

Q-PROP™ Technology and Silent Operation

The Sleipner SX50/140 integrates Q-PROP™ technology with a five-blade skewed propeller, designed to reduce noise levels by 20 to 40% in real-world installations, and up to 75% in controlled tests. This design maintains or improves thrust performance while minimizing noise nuisance during maneuvering.

Advanced Control and Protections

The thruster features the Intelligent Power Control (IPC) system, a patented feature that minimizes mechanical wear by reducing the delay between direction changes and monitoring solenoid functions. In case of solenoid blockage, the thruster automatically stops to prevent damage. Overheat protection ensures automatic system shutdown when high internal temperatures are detected. Additionally, all underwater components are electrically isolated from the vessel’s electrical system via galvanic separation to eliminate stray currents and prevent corrosion. The system also complies with ISO 8846 for ignition protection.

Installation and Durability

The external design of the SX50/140 allows for more efficient water cooling, resulting in longer duty cycles compared to traditional thrusters. Its installation is versatile, capable of being mounted on the transom, under the hull at the bow or stern, without requiring fiberglass (GRP) work for hull thicknesses up to 50 mm. The one-piece design simplifies assembly and reduces installation time. Durability is ensured by an all-aluminum body with advanced corrosion protection and sealed-for-life gearbox lubrication, protected by a robust mechanical seal.

Documentation

Type	Nom
	Documentation Sleipner — Propulseur externe poupe SX50/140 50kg 12V

Expert opinion

« Analysis of the Sleipner SX50/140 external thruster: maneuverability and simplified installation »

The Sleipner SX50/140 external stern thruster is a relevant solution for owners of 8 to 11-meter boats looking to improve maneuverability without the installation constraints of a traditional tunnel thruster. Its external design is a major advantage, particularly for vessels where internal layout does not allow tunnel integration, or for simplified aftermarket installation.

One of the strategic advantages of this model lies in its ease of integration. The absence of fiberglass (GRP) hull work for thicknesses up to 50 mm significantly reduces installation time and cost. The one-piece design also contributes to faster and more reliable field implementation. The mounting flexibility (transom, under-hull) allows adaptation to various hull shapes.

Technically, the Q-PROP™ technology stands out for its ability to minimize noise, a significant comfort factor during harbor maneuvers. Integrated protection features such as Intelligent Power Control (IPC), overheat protection, and galvanic isolation ensure operational reliability and extended system longevity. External water cooling enables longer operating cycles, which is an advantage in prolonged maneuvering situations. However, it is crucial to validate sizing and installation with an expert, as well as voltage (12V for this model), to ensure optimal integration with the boat's electrical system.

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Sleipner SX50/140 50kg 12V External Stern Thruster

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Frequently Asked Questions

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What is the Sleipner SX50/140 50kg 12V stern thruster used for?

The Sleipner SX50/140 50kg 12V stern thruster is designed to simplify your boat’s handling. It is particularly useful during docking and departures, providing enhanced control for lateral movements. This model is installed externally on the stern.

What is the thrust power of this bow thruster and for which boat size is it recommended?

This thruster delivers 50 kg of thrust at 10.5V and 62 kg at 12V. It is ideally suited for vessels measuring between 8 and 11 meters (27 to 37 feet).

What is the supply voltage and power of this Sleipner SX50/140 thruster?

The Sleipner SX50/140 thruster operates at a supply voltage of 12V. Its output power is 2.8 kW, equivalent to approximately 3.75 hp.

Is the SX50/140 thruster quiet?

Yes, this model integrates Sleipner’s Q-PROP technology. It features a five-blade, skewed propeller that reduces noise by 20 to 40% in real-world installations, and up to 75% in controlled tests, while maintaining or improving thrust performance.

What are the built-in protections for the SX50/140 thruster?

The SX50/140 thruster is equipped with several protection features:

Overheat protection: Automatically detects high internal temperatures and shuts down the system before damage occurs. Galvanic isolation: All underwater components are electrically isolated from the onboard system to eliminate stray currents and prevent galvanic corrosion. Intelligent power control: Minimizes mechanical wear by ensuring minimal delay between direction changes and monitoring solenoid performance.

How does the lubrication system of the SX50/140 thruster work?

The SX50/140 thruster uses a gravity-feed lubrication system (Gravity Feed Lubrication). A separate oil reservoir, located above the waterline, feeds the lower unit by gravity, creating positive pressure for effective water sealing and simplifying oil changes. It also features sealed drive lubrication (Sealed Drive Lubrication), factory-filled for extended service life with ceramic and carbon seals.

Is it possible to improve the speed control of the SX50/140 thruster?

Yes, the SX50/140 thruster can be upgraded with the PRO™ variable speed control. This option allows for smoother, quieter, and more precise maneuvering via variable speed operation. It also includes a hold function for twin systems, enabling the boat to be gently held against the dock with a single button press.

Why is this thruster only offered on a quote basis?

This thruster is a major piece of marine equipment requiring thorough technical validation before purchase. It is offered on a quote basis to ensure correct sizing for your boat type, appropriate voltage, optimal stern installation, and selection of necessary accessories for a complete, secure, and high-performance installation.