Side-Power SE210/250TC, 24V, Twin Props Counter-Rotating, 440 lbs Thrust

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$195.00 (Fixed Shipping Cost)

Side-Power SE210/250TC, 24V, Twin Props Counter-Rotating, 440 lbs Thrust

The 210/250TC is designed for yachts from 55-78' loa.  It's large, 13.15HP motor and robust gearing generate from 462 (@ 21V) to 550 lb (@ 24V) of thrust - all in only a 10" tunnel diameter.  Like all other Sidepower units, it is loaded with safety features and has a wide range of accessories available to customize any installation to each owner's individual requirements.


Thrust @ 21VDC 462 lb (210 kg)
Thrust @ 24VDC 550 lb (250 kg)
Approx. Boat Size 55-78' (17-24 m)
Power 13.15 hp (10 kw)
Recommended Fuse Size 500 Amps (SMANL500)
Minimum Battery Capacity 1235 CCA SAE
Fuse Size 500 Amp
Approximate Ship Weight (lbs) 149


The gearhouse / drive legs of most Sleipner DC Electric thrusters are now fully galvanically isolated / separated from the electric motor and motor bracket. This ensures that even if there is an accidental short circuit or a current leak for other reasons, the immersed parts are not effected as they could be with direct electric contact.

  • Achieved by composite bushings around the bolts and beneath the washers and a bushing in the motor bracket electrically isolating the drive housing from the motor bracket.
  • Available on DC electric models with flexible couplers only, where the flexible coupler provides galvanic separation of the motor and gearleg shaft.
Side-Power Sealed Drive

Sealed drive lubrication

Sealed gearleg with long-life "mechanical" seal where highly polished ceramic and carbon surfaces form the only moving sealing surfaces, ensuring protection against damaging water intrusion into the gear leg. Pre-filled with special gear oil for lifetime lubrication.

  • "Mechanical" seals with surfaces of ceramic and carbon for ultimate security against water intrusion

Twin Propellers 

Two counter-rotating propellers can give the most thrust at a good performance ratio in a minimal tunnel diameter. This system is used in our larger thrusters for maximum power. The TC models are the favourite thrusters among leading boatbuilders for their high-end yachts.

Side-Power Q-prop™


The new 5 blade special skew propellers are the result of over 2 years of development work and thousands of tests. They have been designed to reduce the noise level, while maintaining the exceptional efficiency of the old 4 blade Sleipner propellers. This goal was achieved, and we even chose to make them a little bit more aggressive on some models, increasing the thrust on some thrusters about 5%. Please see individual information on each new thruster for more details.

  • Noise reductions of up to 75% measured in controlled environments
  • The expected and tested normal noise reduction in average installations: 20-40%
  • Will be delivered on all Sleipner models except models with 300 mm and 385 mm tunnel diameter
  • Upgrade kits are available for most SP series thrusters with special adaptors
Side-Power Intelligent Power Control

Intelligent power control

The Sleipner unique thruster controller that intelligently protects the thruster from potential inherent problems in all high current applications as well as user faults. It includes several important safety features imperative in a product with such high power, run by DC electrics, as a thruster.

  • Provides delay between drive directions
  • Monitors solenoid functions to reduce the chance of solenoid lock-in
  • Will stop the thruster in case of a lockedin solenoid, without extra user action and even without controlling a main switch.


Measurements Value
(H) Height 480mm / 18.90in
(L) Length 274mm / 10.79in
(W) Width 337mm / 13.27in
(ID) Internal Diameter 250mm / 9.84in
(WD) Water Depth 250mm / 9.84in
(TL) Recommended Tunnel Length 323mm / 12.72in
(TL min.) Minimum Tunnel Length 273mm / 10.75in
(T min.) Minimum Tunnel Wall Thickness 7mm / 0.28in
(T max.) Maximum Tunnel Wall Thickness 9mm / 0.35in

Stern Measurements Value
(L) Internal Length 422mm / 16.5in
(+L) Tunnel Length 360mm / 14.2in
(WD) Stern Water Depth 250mm / 9.8in
(HT) Maximum Hull Thickness 50mm / 2in