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Discontinued thruster
Sleipner SEP170/250TC (discontinued): specs, manual and parts
The Sleipner SEP170/250TC is a tunnel thruster. The motor sits inside the boat and turns a propeller in a tube through the hull. Sleipner has discontinued it. Its own product page said so when we read it on 1 October 2026.
This page stays up for the owners still running one. It holds the published figures, the part numbers, the manual and the last price we read. You will not find the unit in the thruster finder, the tool here that matches a unit to your boat, or on the compare page. If you need a new thruster, start with either of those.
The published figures
| Type | Tunnel, fixed mount |
|---|---|
| Thrust | 462 lb (210 kgf) |
| As the maker printed it | Thrust @ 21VDC: 374 lbs (170 kg); Thrust @ 24VDC: 462 lbs (210 kg) |
| Voltage | 24 V |
| Motor | 8 kW |
| Tunnel diameter | 250 mm |
| Maker’s boat length | 50 to 70 ft |
| Part number | 88347524V |
| Last price we read | $7,380equipment only, defender.com, 28 August 2026. It may no longer be for sale there. |
| Manual | Sleipner’s manual for it |
Service parts
These are Sleipner’s own part numbers for the parts an owner replaces, where we could find them: the pin that drives the propeller, the propeller, the anode, the brushes, the switch gear, the fuse and the motor. We read them on 11 October 2026. The last column says how we know each one fits this model. Give the dealer your thruster’s serial number from its label when you order.
| Part | Part number | Sleipner’s name for it | How we know it fits |
|---|---|---|---|
| Drive pin (the pin that drives the propeller) | 9 1241 | Drive pin propeller SE120-300 | Sleipner’s parts page lists this model |
| Propeller, right hand | 10 1271 RH | Propeller, Q-Prop Ø250mm RH | Sleipner’s parts page lists this model |
| Propeller, left hand | 10 1271 LH | Propeller, Q-Prop Ø250mm LH | Sleipner’s parts page lists this model |
| Anode | 20 1180 A | Anode kit (Al-Zn-In), for 215/300 mm gear legs | Sleipner’s parts page lists this model |
| Anode, zinc version | 20 1180 | Anode, zinc SE120/SE130/SE170/SP155/220/285 | By the part’s name only. Confirm with your serial number. |
| Gear leg gasket | 10 1312 | Gasket for gearleg/tunnel SE130/170/210 | Sleipner’s parts page lists this model |
| Motor brush kit | BRUSH-14K | Brush kit SP155 + SE150/170 | By the part’s name only. Confirm with your serial number.Sleipner asks for the thruster’s serial number with every brush kit order. |
| Solenoid (the motor switch) | 1013703 | Solenoid SE150/170/210/250/300 + SP200/240/285 | Sleipner’s parts page lists this model |
| Main fuse | ANL 400 | Recommended fuse A | Sleipner’s page for this modelThe rating on Sleipner’s page for this model. The fuse holder is SMANLHOLD. |
| Replacement motor | 10 0104 24 | 24V (SEP/SRP/SRV/SRVP170) | Sleipner’s parts page lists this model |
What the manual and listings say
PRO means proportional: the joystick sets how hard it pushes. The 2026 catalog says to expect close to continuous run time at half power or less. Twin counter-rotating props in a 250 mm tunnel, 24 V only, for boats of 50 to 70 ft, with the SE170's motor. It is rated 210 kg at 24 V and 170 at 21.
The page rates the brushed motor for two to three minutes' running at 20 C. The control panel switches itself off after about six minutes unused. Sleipner's FAQ wants the tunnel at least three quarters of its diameter below the surface, never less than half.
Replacement and close alternatives
The replacement: Sleipner E170 eVision. Sleipner’s own page for this model links it as the replacement.
These are Sleipner’s nearest current sizes in the same line, by thrust.
- Nearest below: Sleipner SEP130/250T, 352 lb, $7,290.
- Nearest above: Sleipner SEP210/250TC, 550 lb, $9,023.
Other makers’ current units of the same style, for the same end, within a quarter of its published thrust:
- VETUS Bow Pro Boosted 210, 463 lb, $8,745.
- Max Power CT165, 408 lb, $3,684.
- Quick BTQ 250, 265 to 529 lb, $8,624 to $10,571.