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Price:$12,030.00 EachIn Stock (5)
Thruster, Hydraulic 420 kg Thrust/386 mm tunnel 37cc Gear motor, CR Composite K-props/oilfed leg
  • Overview
  • Features
  • Specifications

Side-Power SH420 Hydraulic Thruster with Parker Ultra Motor 37cm3, Max. Thrust 420kg/925lbs, Twin Counter Rotating 4-Bladed Props

The Side-Power SH420 hydraulic thruster with twin counter rotating four-bladed propellers produces 925 lbs of thrust at 100% performance. Side Power hydraulic thrusters can be purchased as part of a complete hydraulic system. 

A complete Side-Power engineered system allows full proportional control of the thruster and unlimited run time, all based on the S-Link plug and play system.  Learn more about Side-Power hydraulic thruster systems.  Contact your local Side-Power representative for a system tailored to your needs.



Features & Benefits

  • Wide range of hydraulic motor sizes and types to optimize performance of the thruster unit
  • Unlimited run time at any thrust level, including max thrust
  • Reduced long term maintenance when compared to DC or AC thrusters
  • Improved maaximum thrust based on tunnel size
  • Total integration into any hydraulic system or supplied as part of a Side-Power engineered system


  • Propulsion technology know-how, maximizing amount of thrust from the system
  • Lightweight composite propellers reduce work needed to get up to speed and stop rotation
  • Streamlined gear housing, reducing turbulence in the tunnel and maximizing flow


  • Compact size to reduce the amount of interior volume needed
  • Simple Plug and Play wiring
  • Easily accessible hose connections
  • Fast and safe propeller mounting with lock nut
  • GRP and composite bolt-on stern thruster tunnel kits pre-drilled for ease of installation
  • Easy access zinc anodes allow quick and simple changing

Safety and Reliability

  • Mechanical protection of drive gear through flexible coupling between gearleg and motor
  • Control panels have child-safe On system and timed shut down from last use
  • 2 year limited warranty
Manufacturers Part NoSH420/386TC-U37
Light Duty Thrustup to 925 lbs. (420 kg)
Pump Output46.9hp 35kW)
Motor Size37cm³ (2.25 in.³)
Required Pressure247bar (3582psi)
Required Flow85lpm (22.5gpm)
Min Depth to Top of Tunnel7.60" (193mm)
Min Depth to Center of Tunnel15.19" (386mm)
Typical Boat Size75-110' (22-35m)
Heavy Duty Thrustup to 835 lbs. (380 kg)
Propulsion SystemTwin Counter Rotating, 4-blade props
Hydraulic Power41.3hp (30.8kW)
Standard VersionGear Motor (Size determined by input spec)
Weight w/ aluminum gearhousing114.2 lbs. (51.8 kg)
Approximate Ship Weight (lbs)116


Cancer and Reproductive Harm-


Hydraulic Thrusters

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It is no secret that the most stressful part in boating is when you are in close quarters to other boats.  Maneuvering around crowded marinas and anchorages is a challenge for even the most skilled operator.  Add wind current and ever increasing crowds, maneuvering with confidence is the only way to keep your experience a happy one.

Thruster systems were developed to allow more confident control of a vessel under any conditions and have become a virtual necessity in today’s marine industry.  As technology has improved, thruster systems have become ever more useful with improved functionality and performance.  All along, Sleipner (formerly known as Side-Power) has been at the forefront of thruster development and performance.

Sleipner (Side-Power) hydraulic thruster systems are based on the proven and reliable DC and AC thruster gear legs using hydraulic power.  The thruster systems can be combined with a complete hydraulic system, giving the advantages of a seamless proportionally controlled system with unlimited run time.  Combining a thruster system like this with Sleipner (Side-Power) stabilizer systems provides complete control and comfort under any conditions.

Each hydraulic thruster model has a number of options for motor sizing.  This is to better match the available pressure and flow of existing systems or to give greater flexibility when designing complete systems.  As with the DC and AC systems, the thrusters are designed to minimize power consumption while maximizing thrust.  This is why all of the models are named by thrust output and not by horsepower.

All of our thrusters can be used for bow or stern thruster applications.  For help picking the right thruster for your vessel, please contact IMTRA customer support or your local Sleipner (Side-Power) dealer.  Downloading and filling out our hydraulic systems questionnaire will help us better answer many of your questions.


Hydraulic Bow and Stern Thruster System Frequently Asked Questions


What Are Hydraulic Boat Thrusters, and How Do They Work?

Hydraulic boat thrusters are propulsion devices that provide lateral or bow/stern movement using hydraulic fluid pressure. They work by redirecting fluid flow through nozzles to create thrust, enabling precise boat maneuvering.


What Advantages Do Sleipner Hydraulic Thrusters Offer?

Sleipner hydraulic thrusters offer exceptional maneuverability, reduced noise, and efficient operation. They are also compact and suitable for various boat sizes.


Which Boats Are Suitable for Installing Sleipner Hydraulic Thrusters?

Sleipner thrusters are suitable for a wide range of boats, including sailboats, motorboats, yachts, and commercial vessels.


Are Hydraulic Boat Thrusters Compatible With Different Boat Sizes?

Yes, Sleipner offers hydraulic thrusters in various sizes to accommodate boats of different sizes and weights.


How Can I Choose the Right Sleipner Hydraulic Thruster for My Boat?

Consult with a Sleipner dealer or professional installer who can assess your boat's specifications and recommend the appropriate thruster model.


What Maintenance is Required for Hydraulic Thrusters?

Routine maintenance includes checking fluid levels, hoses, and seals. It's recommended to have them serviced by a qualified technician periodically.


Can I Retrofit My Boat With Sleipner Hydraulic Thrusters?

Yes, many boats can be retrofitted with Sleipner hydraulic thrusters, but it's best to consult with a dealer or installer to assess feasibility.


What is the Warranty and Support Available for Sleipner Thrusters?

Sleipner offers warranties on their products, and support is available through authorized dealers and service centers.


Are There Any Safety Considerations When Using Hydraulic Boat Thrusters?

Users should follow safety guidelines and be aware of potential hazards associated with hydraulic systems. Proper training is recommended.


Where Can I Purchase and Install Sleipner Hydraulic Thrusters for My Boat?

Sleipner hydraulic thrusters can be purchased through authorized dealers and installed by certified professionals with expertise in marine thruster systems.