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Discontinued thruster
Sleipner SEP120/215T-24IP (discontinued): specs, manual and parts
The Sleipner SEP120/215T-24IP 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 11 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 | 306 lb (139 kgf) |
| As the maker printed it | 306 lbs (139 kg) at 24V DC |
| Voltage | 24 V |
| Motor | 6.4 kW |
| Tunnel diameter | 215 mm |
| Maker’s boat length | 42 to 60 ft |
| Part number | 88346724V |
| Last price we read | $7,875equipment 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 | By the part’s name only. Confirm with your serial number.Sleipner describes it as fitting SE120 to SE170 units. This model is not on its list. |
| Propeller | 9 1261 | Propeller SE120/150 5bl Q-Prop, 215 mm | By the part’s name only. Confirm with your serial number. |
| Anode | 20 1180 A | Anode kit (Al-Zn-In), for 215/300 mm gear legs | By the part’s name only. Confirm with your serial number. |
| Anode, zinc version | 20 1180 | Anode, zinc SE120/SE130/SE170/SP155/220/285 | By the part’s name only. Confirm with your serial number. |
| Motor brush kit | BRUSH-13K | Brush kit SP95 + SE100/120 24V | By the part’s name only. Confirm with your serial number.Sleipner asks for the thruster’s serial number with every brush kit order. |
| Gear leg gasket | 9 1355 | Gasket for gearleg/tunnel SE120/150 | By the part’s name only. Confirm with your serial number. |
| Power control unit (the controller) | PPC520-NH | Power control unit for PRO thrusters, without harness | Sleipner’s parts page lists this model |
| Main fuse | ANL 325 | Recommended fuse A | Sleipner’s page for this modelThe rating on Sleipner’s page for this model. The fuse holder is SMANLHOLD. |
| Replacement motor | 8 0110 24 | SEP120 24V IP | Sleipner’s parts page lists this model |
What the manual and listings say
The ignition-protected build, for a boat with gasoline engines or tanks in the same space. 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. This unit has the same 215 mm tunnel and 139 kg rating as the SEP120, 24 V only.
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 E120 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 SEP100/185T-IP, 256 lb, $8,190.
- Nearest above: Sleipner SEP170/250TC-IP, 463 lb, $9,045.
Other makers’ current units of the same style, for the same end, within a quarter of its published thrust:
- VETUS Bow 125, 275 to 308 lb, $4,589.
- Lewmar 250TT GEN 2 Tunnel Thruster, 308 lb, $4,949.
- Max Power CT125 (24 V), 254 lb, $2,947.