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Discontinued thruster
Sleipner SX35 12V (discontinued): specs, manual and parts
The Sleipner SX35 12V is an external thruster. It mounts on the outside of 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 and the manual. 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 | External, fixed mount |
|---|---|
| Thrust | 93 lb (42 kgf) |
| As the maker printed it | Thrust at 12V: 42kg / 93lbs; Thrust at 10.5V: 35kg / 77lbs |
| Voltage | 12 V |
| Motor | 1.8 kW |
| Maker’s boat length | 19 to 32 ft |
| Part number | SX35/140-12V-50PODpod, bow or stern, 12VSX35/140-12V-50MMstern, hull up to 50 mm, 12VSX35/140-12V-150MMstern, hull up to 150 mm, 12V |
| Last price we read | No price held |
| 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 |
|---|---|---|---|
| Controller | CONT-SX35-12V | Controller SX35/140 12V | Sleipner’s parts page lists this model |
| Solenoid, inside the controller | 4 1571 12 | Solenoid 12V | Sleipner’s parts page lists this model |
| Delay relay, inside the controller | 6 1232 I | Delay relay | Sleipner’s parts page lists this model |
| Controller seal | SM166663 | Seal | Sleipner’s parts page lists this model |
| Propeller | 5 1260 | Propeller SE50/SX35/SX50 5bl Q-Prop, 137 mm | Sleipner’s parts page lists this model |
| Anode kit, both sides | SM195647 | Anode retrofit kit for both sides SX35/50 | Sleipner’s parts page lists this model |
| Side covers | SM910533 | SX35/50 Side Covers Replacement Kit | Sleipner’s parts page lists this model |
| Main fuse | ANL 150 | Recommended fuse A | Sleipner’s page for this modelThe rating on Sleipner’s page for this model. The fuse holder is SMANLHOLD. |
What the manual and listings say
The 12 V SX35 as first sold, before Sleipner added a separate controller unit. It bolts to the outside of the hull through three small holes below the waterline, so the boat comes out of the water to fit it.
It came as a pod for the bow or stern, and as a stern unit for a hull up to 50 mm or up to 150 mm thick without glass work. Sleipner rates it 42 kg (93 lb) at 12 V and 35 kg (77 lb) at 10.5 V. Its replacement is the same model sold with the controller unit.
Replacement and close alternatives
The replacement: Sleipner SX35 with the controller unit. Sleipner’s own page links the same model sold with its controller unit as the replacement.
These are Sleipner’s nearest current sizes by thrust, in any of its lines.
- Nearest above: Sleipner SX50 Compact Stern Thruster, 137 lb, $4,365 to $4,658.
Other makers’ current units of the same style, for the same end, within a quarter of its published thrust:
- DockStar Smart Thruster, stern, 90 lb, $4,270 to $4,570.
- Max Power CT45 stern pod, 99 lb, $3,275.