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Side-Power SEP40/125S DC Thruster (Proportional Control)

  • Type: Single Prop, Blades: 5, Thrust: 88 lbs @ 10.5 VDC (3 HP)
  • Operating Power: 10.5 Volt DC, Draw: 280 Amps @ 10.5 Volts DC
  • Boat Length: 26-34', Tunnel Diameter: 4.92" (125 mm), Power: 12 Volts DC
  • Item #: 
    Model #: 


    Shipping Weight: 
    22.00 Lbs.
    List Price: 
    Note:  This item ships from the manufacturer.
    It typically ships within 2 business days  (more...)
    Status:   null Ships Direct

    Quantity : 

    Side-Power General Features:

    • Built for outstanding performance, you can rely on your Side-Power bow thruster or stern thruster year after year
    • Boat builders all over the world are choosing Side-Power for reliability, ease of installation and unrivalled safety features
    • This commitment to quality has made the new range of Side-Power thrusters manufactured by Sleipner Motor the market leader
    • Performance
      • The high performance of a Side-Power thruster is a result of their continuous efforts in product development and testing. propulsion technology know-how 5-bladed composite propellers purpose-built high power electric motors improved water flow from streamlined gearhouse design
    • Safety:
      • Side-Power thrusters include several features to ensure the safety of your boat and its passengers
      • These features protect against technical and operator errors
      • No overheating of electric motor
      • Mechanical protection of drive gear
      • Electronic protection against sudden change of drive direction
      • No accidental operation from child safe on/off and automatic deactivation
      • IPC comes standard on all DC electric thrusters hence reducing solenoid wear and the risk of lock in
    • Reliability:
      • The quality of a Side-Power thruster is always one step ahead
      • In house manufacturing and assembly
      • Engineering through experience
      • Use of superior materials
      • Controlled quality of every supplied part
      • 2-Year limited warranty
    • Installation
      • Through their extensive experience and close co-operation with major boat builders we know how important a correct installation is for the thruster system
      • Therefore they have made all the preparations to ensure that it is easy to install a Side-Power correctly
      • Compact-sized units
      • "Plug and Go" Electric wiring
      • Easily accessible battery cable terminals
      • Fast and safe propeller mounting with locknut
      • Professional and solid GRP stern thruster kits
      • Easy access zinc anodes

    The Speed Controlled Thrusters ( SEP Series ) Features:

    • The SEP series are basically SE thrusters with the addition of the DC Power control system
    • Providing even more accurate control by fully regulating the power of the thruster as well as providing even longer run times, this is the latest in DC electric thrusters
    • The noise reduction and automatic "Hold" function are further benefits provided by the SEP series
    • Powerful single speed thrusters can, in light weather conditions, be a bit difficult to use as they push the boat too fast
    • The solution is to fit the new Sidepower DC Power Controller which enables proportional speed control of a DC electric thruster
    • By also controlling the thruster's power, you get even more precise handling of the boat in all conditions
    • Another great advantage is that when you run the thruster at less than full power, the usable run time is extended, with close to continuous usage being possible when you are running the thruster at less than 50% of full power (percentage of thrust with continuous duty depending on thruster model)


    Thrust @ 10.5 VDC
    88 lbs (40 kg)
    Thrust @ 12 VDC
    105 lbs (48 kg)
    Approx. Boat Size
    26-34' (8-10.5m)
    Tunnel Diameter (I.D.)
    4.92" (125 mm)
    Propulsion System
    Power @ 10.5 V
    3 hp (2.2kw)
    12 VDC
    Minimum Battery Capacity
    570 CCA SAE
    Recommended Fuse Size
    250 Amp (SMANL250)
    Min Depth to Top of Tunnel
    3.70" (94mm)
    Min Depth to Center of Tunnel
    7.40" (188mm)

    Other Items to Consider when Purchasing a New Thruster:

    • Bow Tunnel or Stern Tunnel
    • Control Panels and Accessories
    • Remote Controls
    • Manual Battery Switch and Fuse & Fuse holder
    • S-Link Control Cabling

    Note: On/Off Thruster Systems can be Upgraded to Speed Control Thrusters. Call Defender or Imtra for Additional Details


    Documentation available at the following links:

    Click to see the Product Brochure for this product line.

    Click to see the Product Specifications for this product line.

    Side-Power S-Link System Dual Joystick Speed Control Panel with Display
    Item #: 305704
  • Allows Fingertip Control of both Bow and Stern Thruster with Hold Function
  • Dimensions: 5.55" H x 3.27" W (141 x 83 mm)
  • Designed for Plug and Play S-link Control Cable Wiring
  •  Include
    Model #:
    Side-Power S-link System T-Connector for Spur
    Item #: 305707
  • (1) Required for each S-link Spur Including the Power Cable
  • Round, Compact and Waterproof Plug
  • Designed for Plug and Play S-link System Wiring
  •  Include
    Model #:
    Side-Power S-link System Cable Terminator
    Item #: 305708
  • (1) Required for in each End of the Backbone "Loop"
  • Round, Compact and Waterproof Plug
  • Designed for Plug and Play S-link System Wiring
  •  Include
    Model #:
    Side-Power S-Link System Backbone Extender Connector
    Item #: 305709
  • Designed to Allow Addition of Backbone Cables to S-link Systems
  • Round, Compact and Waterproof Plug
  • Designed for Plug and Play S-link System Wiring
  •  Include
    Model #:
    Side-Power S-Link System Spur Power Cable
    Item #: 305710
  • Cable Length: 2.5 meters
  • (1) Required for S-link System
  • Designed for Plug and Play S-link System Wiring
  •  Include
    Model #:
    Side-Power Automatic Main Switch for S-Link System (Speed Control) Thrusters
    Item #: 305722
  • Provides User Friendly and Safe Thruster Control, Select Power
  • Includes Emergency Manual and Automatic On / Off Feature
  • Requires Proper Fuse for Specific Thruster (Fuse Sold Separately)
    Model #:
    Multiple Voltage Choices Available
    Side-Power S-Link System Spur Cable
    Item #: 305846
  • Select Cable Length
  • Round, Compact and Waterproof Plugs
  • Designed for Plug and Play S-link System Wiring
  •   null
    From: $42.99
    To: $69.99
    Side-Power S-Link System Backbone Cable
    Item #: 305845
  • Select Cable Length
  • Round, Compact and Waterproof Plugs
  • Designed for Plug and Play S-link System Wiring
  •   null
    From: $42.99
    To: $164.99
    Side-Power 8730 S-Link System Switch Interface
    Item #: 305706
  • Required when Building an S-link System
  • Connects Foot Switches, Standard Radio Remotes and Control Panels
  • Power: 12 / 24 Volt DC, Select Bow or Stern Thruster Interface
    Model #:

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