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- SX80 external stern thruster 12V
Depending on your vessel's configuration in the stern, you might want to consider additional accessories for an optimal installation.
Thrusters
SX80 external stern thruster 12V
80kg thrust, on/off
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Q-PROP™
The Q-PROP™ has measured noise reductions of up to 75% in controlled environments. The five-bladed skew propeller reduces noise levels while maintaining exceptional efficiency. Some thruster models even see an increase in thrust power.
- The expected noise reduction in average installations: 20-40%
- Upgrade kits are available for most Sleipner thruster models with special adaptors
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INTELLIGENT POWER CONTROL
Sleipner's patented intelligent power control provides a minimal delay between drive directions to reduce wear of the mechanical parts while monitoring solenoid functions. In the case of a solenoid lock-in, the thruster will automatically stop without extra user action or controlling the main switch.
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OVERHEAT PROTECTION
When high temperatures are detected, On/off thrusters are automatically shut off to prevent overheating. PRO™ thrusters with speed control provide extended run-time by derating power to maintain temperature within safe levels.
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ANALOG
Sleipner analog signal cables with Plug & Play connectors are color-coded to match the wiring diagrams with high-quality connectors to ensure a correct installation.
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GALVANIC SEPARATION
Immersed parts exposed to seawater are galvanic isolated from the onboard electrical system, eliminating stray currents.
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SEALED DRIVE LUBRICATION
The thruster gearleg is pre-filled for lifetime lubrication and sealed using a long-time mechanical seal with ceramic and carbon surfaces for ultimate security against water intrusion.
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TWIN PROPELLERS
Twin propellers can provide more thrust than a single propeller system in the same tunnel diameter. We use this system in our mid-range models, where high thrust is required in small tunnel diameters. Due to the compact design and high performance, the twin models have become the thrusters of choice among boatbuilders worldwide.
Item code: SX80/185T-12V
SX80 is an efficient stern thruster designed for boats up to 48 feet with twin stern drives. The thruster provides 80-96 kg thrust, and its special cowls redirect water flow past the stern drives.
The unit is delivered fully assembled, wired, and sealed in a waterproof box and only requires a small hole in the boat's transom to attach power- and control cables.
Remote control is a popular accessory. See some of the important product and safety features below.
Sleipner's SX stern thrusters are the perfect choice for boats equipped with twin stern drives. The unit features special cowls that divert water flow past the stern drive legs, ensuring excellent performance. Thanks to its hydrodynamic shape, short flow channel, and optimal placement, the unit boasts minimal water resistance, allowing for high speeds without any perceptible loss.
Installation is a breeze, as the SX stern thruster is delivered preassembled, wired, and sealed in a waterproof box. Only a small hole in the boat's transom is required to attach the power and control cables. The streamlined design of the unit reduces noise emission by about 80%, thanks to its external placement of the engine, which also eliminates potential border cavitations.
Moreover, the external placement of the unit provides more efficient water cooling, resulting in a much longer duration per cycle compared to traditional bow and stern thrusters. With ignition protection as standard, installing the SX stern thruster in petrol-powered boats is safe. Trust Sleipner's SX stern thrusters for reliable and safe performance on the water.
Properties
Q-PROP™
The Q-PROP™ has measured noise reductions of up to 75% in controlled environments. The five-bladed skew propeller reduces noise levels while maintaining exceptional efficiency. Some thruster models even see an increase in thrust power.
- The expected noise reduction in average installations: 20-40%
- Upgrade kits are available for most Sleipner thruster models with special adaptors
INTELLIGENT POWER CONTROL
Sleipner's patented intelligent power control provides a minimal delay between drive directions to reduce wear of the mechanical parts while monitoring solenoid functions. In the case of a solenoid lock-in, the thruster will automatically stop without extra user action or controlling the main switch.
OVERHEAT PROTECTION
When high temperatures are detected, On/off thrusters are automatically shut off to prevent overheating. PRO™ thrusters with speed control provide extended run-time by derating power to maintain temperature within safe levels.
ANALOG
Sleipner analog signal cables with Plug & Play connectors are color-coded to match the wiring diagrams with high-quality connectors to ensure a correct installation.
GALVANIC SEPARATION
Immersed parts exposed to seawater are galvanic isolated from the onboard electrical system, eliminating stray currents.
SEALED DRIVE LUBRICATION
The thruster gearleg is pre-filled for lifetime lubrication and sealed using a long-time mechanical seal with ceramic and carbon surfaces for ultimate security against water intrusion.
TWIN PROPELLERS
Twin propellers can provide more thrust than a single propeller system in the same tunnel diameter. We use this system in our mid-range models, where high thrust is required in small tunnel diameters. Due to the compact design and high performance, the twin models have become the thrusters of choice among boatbuilders worldwide.
| Cold Cranking Amps (CCA) | Value |
|---|---|
| Minimum battery CCA (DIN) | 550 |
| Minimum battery CCA (SAE) | 1045 |
| Minimum battery CCA (EN) | 940 |
| Current draw | Value |
|---|---|
| Standard current draw | 530A |
| Dimensions | Value |
|---|---|
| (H) Height | 692mm / 27.2in |
| (L) Length | 314mm / 12.3in |
| (W) Width | 385mm / 15.16in |
| (ID) Internal Diameter | 185mm / 7.3in |
| (WD) Water Depth | 185mm / 7.3in |
| (a) | 115mm / 4.5in |
| (b) | 91mm / 3.5in |
| (c) | 140mm / 5.5in |
| (d) | 25mm / 0.98in |
| (e) | 296mm / 11.65in |
| Electrical Data Matrix | Value |
|---|---|
| Recommended fuse | ANL 400 |
| Ideal vessel integration | Value |
|---|---|
| Typical vessel class | Motor boat |
| Typical vessel size | 10-15m / 35-48ft |
| Installation capability | Value |
|---|---|
| Bow Capability | No |
| Stern Capability | Yes |
| Retractable Capability | No |
| External Mounting Capability | Yes |
| Tunnel Capability | No |
| Motor | Value |
|---|---|
| Voltage electric motor | 12V DC |
| Power Output | 4.4kW / 5.9hp |
| Performance | Value |
|---|---|
| Items operating power source | Electric |
| Product Features | Value |
|---|---|
| Intelligent Power Control | Yes |
| Q-Propeller | Yes |
| Single Propeller | No |
| Twin Propellers | Yes |
| Twin Counter Rotating Propellers | No |
| Gravity Feed Lubrication | No |
| Sealed Drive Lubrication | Yes |
| Galvanic Separation | Yes |
| IP - Ignition Protection | No |
| PRO - Variable Speed Control | No |
| S-Link | No |
| Analog | Yes |
| Splash-Proof | No |
| Flexible Coupling | No |
| Safe Start-Up | No |
| DC Electrical | Yes |
| Hold Thrust | No |
| Ceramic Seals | Yes |
| Patented Design | No |
| Thrust ratings | Value |
|---|---|
| Thrust at 12V | 96kg / 212lbs |
| Thrust at 10.5V | 80kg / 176lbs |
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Product specification sheet_DC_thrusters
Product sheetEnglishpdf -
Installation Manual, SX (SX80, SX100)
User Manual, Installation ManualEnglishpdf -
Product announcement: SX50 Control box modifications
Marketing DocumentationEnglishpdf -
STP.fil SX80-185T (12-24V) simple version
CAD FileEnglishstp -
DWG.fil SX80-185T (12-24V) with cowls - metadata
CAD FileEnglishdwg -
DWG.fil SX80-185T (12-24V) without cowls - metadata
CAD FileEnglishdwg
SX80 external stern thruster 12V
Guide to navigating spare parts
Below you will see the top-level assembly of spare part groupings available to you. If you desire a component within the presented assembly group, click on the name tag below the image to be directed to a detailed spare parts list for that assembly group. If no additional spare parts are available, it means that the current assembly group must be purchased as a whole due to service or installation requirements.
Flexible coupling kit Ø20.3xØ16.3 L=61
Moisture absorbing pack
Washer
Nut
1 Electric motor ONLY - SX80/12V
Controller
Uninsulated cable lug
Lock washer
Bolt
Electric motor 12V
Brushes for motor (kit)
Brushes spring for motor (kit)
Temp switch
2 Cover chassis, upper part kit SX80/100
DIN 912 - M6 x 30
DIN 125 - A 6,4
Cover chassis,upper part,SX thrusters
DIN 9021 - 6,4
DIN 985 - M6x1
3 Motor bracket SE80/100
Bolt
Bracket for motor
4 Gearleg SE80/100
5 Solenoid bracket kit
DIN7985 M5x8 + DIN6797 M5
Bracket for solenoid
Relay Clip
DIN 7337 - A3,2 x 8
6 Gearleg SE80/100 w/out propeller
DIN 912 - M8 x 55
DIN 127 - A 8
DIN 125 - A 8,4
Drive pin
Propeller washer SS2324
DIN 985 - M12x1,75
7 Anode, aluminium SE60/80/100
Anode, aluminium
Bolt - DIN 6912 - M6 x 16
Disclaimer
Sleipner warranties the original spare parts supplied only. The installer alone has responsibility for the installation of the spare parts. Do not attempt to fit replacement parts unless you are competent. If the spare part is fitted incorrectly, Sleipner Group will not be liable for any damage resulting.
The information given in the document was correct at the time it was published. However, Sleipner Group cannot accept liability for any inaccuracies or omissions it may contain. Continuous product improvement may change the product specifications without notice. Consequently, Sleipner Group cannot accept liability for any possible differences between product and document.
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Not necessarily. These systems typically come with a Battery Management System (BMS) that will disconnect the thruster in case of any issue with the battery (for instance, if the thruster draws more current than the BMS allows). Just imagine a sudden cut-out in the middle of a maneuver without any pre-warning.
At Sleipner, we recommend a solution with a simple, separate battery and without a disconnect BMS system (such as the lead acid bank frequently used for starting or similar). The helmsman will then be warned when the battery is getting low and feel that the thrusters are gradually losing power, which is significantly better than losing your thrusters without any pre-warning.
Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.
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Yes, you can, but not without taking some precautions. Sleipner produces two product lines of thrusters that will work well with high-capacity batteries and one product line which should be used with caution in combination with LiFePO4, Lithium, Li-ion, or similar batteries, which may be capable of delivering higher voltage under load than traditional batteries (such as lead-acid, AGM, gel or similar).
- All Sleipner proportional thrusters will work well with Li-ion or LiFePO4 batteries, as the included PPC unit will control the output voltage to a safe level for the thruster. Make sure, though, that you actually get a good battery intended for maritime use. NB - make sure you have the latest embedded software installed.
- All Sleipner eVision thrusters have built-in functionality to limit the maximum voltage delivered to the thruster. Again, make sure your battery is intended for maritime use.
- Traditional DC on/off thrusters may be damaged or have a reduced life expectancy if operated at voltage levels outside their specifications.
Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.
- All Sleipner proportional thrusters will work well with Li-ion or LiFePO4 batteries, as the included PPC unit will control the output voltage to a safe level for the thruster. Make sure, though, that you actually get a good battery intended for maritime use. NB - make sure you have the latest embedded software installed.
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Yes. Most engineers would tell you that it is not ideal for connecting the bow thrusters to a service bank protected by a Battery Management System. Thrusters are heavy consumers, and they may create sudden peaks in current draw, which again may cause the BMS to disconnect the batteries if the thruster draws more current than allowed. If this happens in the middle of a maneuver, you would be left without thrusters and may lose control of the boat.
Hence, Sleipner recommends that the thrusters be connected to a separate battery bank (that is not lithium) without a Battery Management System that can disconnect the batteries (and consequently the thrusters).
Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.
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A Lithium or Li-ion battery may maintain a significantly higher voltage and higher current under load than a lead-acid, gel or AGM battery. This will provide significantly more power to the thruster motor and give some undesired side effects:
- The propeller will rotate significantly faster and with higher power than what they are designed for, increasing the risk of cavitation and following damages in the tunnel and at the thruster.
- The thruster risks overheating and will have shorter run times. This can cause the thruster to stop in the middle of a maneuver.
- Over time, the thruster may be damaged and you may have a reduced life expectancy.
Sleipners speed controlled thrusters will not be impacted by Lithium, Li-ion or similar battery times providing a steady high voltage.
Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.
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This is a unique patented Sleipner safety feature supplied with all standard (on/off) DC electric Sleipner thrusters. The IPC functionality provides two unique features:
1) It will detect "flapping" of the solenoid (typically caused by badly charged batteries that are subject to a huge current draw and voltage drop when the thruster motor is engaged), and will stop trying to run the thruster, preventing excess solenoid contact tip wear and dramatically reducing the risk for a weld-in situation of the solenoid. A 'weld in' (run away) situation is when a thruster continues operating without a signal from the operator at the control panel.
2) Even if the solenoid has a weld-in situation, which even with the IPC prevention actions is still possible, as all mechanical switches can weld-in at a point, the unique IPC function will STOP THE THRUSTER, without active action by the operator. This will give the operator time to locate and Select OFF on the thruster system Isolation/Main Switch.
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Sleipner recommends that the thrusters are connected to a battery bank that is not protected by a Battery Management System (BMS). Typically this means lead-acid, AGM, gel, or similar kinds of batteries. This is important because thrusters draw a lot of currents quickly, and the high amp draw may lead the BMS system to think that there is an issue with the system and consequently disconnect the batteries from the circuit, in which case you would lose maneuverability.
If you have Lithium batteries powering your thrusters, the best advice we can give you is to check the actual voltage measured on the thrusters during operation. Sleipner thrusters are designed to operate within a specific voltage range, and as long as you are within these boundaries, it doesn’t matter for the thruster if the current is delivered by this or that battery pack.
It may also be a very good idea to check the actual current drawn from the battery during full power at the thruster to see that you are not at the limit for the BMS to avoid sudden loss of maneuverability if the BMS disconnects the battery.
With installations where the battery pack is far from the thruster, the higher voltage delivered by LiFePO4 or similar batteries might not be a problem as you will experience a voltage drop through the long cables.
Always make sure you measure your voltage on the thruster to avoid the risk of early thruster wear.
As battery tehcnology is changing rapidly, we always recommend consulting a professional battery supplier.
Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.
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A legacy that commits
We’ve lived and worked with the unruly sea for a hundred years. That’s why we develop important features that enables a boat to handle the sea better – that enable you to enjoy your boat, at anchor and at full speed. That is why you wanted a boat, isn’t it?
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Beautiful engineering
The technology in our solutions is world-class. We know, because we’ve developed it ourselves, just as we manufacture every solution, and follow them until their fixed to a hull, ourselves. This meticulous attention to detail is why your day out always will be better with a Sleipner aboard.
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Worldwide service
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