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Discontinued thruster
Sleipner SXP50 Pro External Kit (discontinued): specs and parts
The Sleipner SXP50 Pro External Kit 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 1 October 2026.
This page stays up for the owners still running one. It holds the published figures, the part numbers 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 | External, fixed mount |
|---|---|
| Thrust | 110 lb (50 kgf) |
| As the maker printed it | 62 kg (136 lbs) at 12/24V; 50 kg (110 lbs) at 10.5/21V |
| Voltage | 12 V or 24 V |
| Maker’s boat length | 26 to 36 ft |
| Part number | 883357for a hull up to 50 mm (2 in) thick, 12/24V883357for a hull up to 150 mm (6 in) thick, 12/24V |
| Last price we read | $6,462 to $6,759full kit, defender.com, 12 October 2026. It may no longer be for sale there. |
| Manual | No manual held |
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 |
|---|---|---|---|
| Controller12 V unit | CONT-SXP50-12V | Controller SXP50 12V | Sleipner’s parts page lists this model |
| Propeller | 5 1260 | Propeller SE50/SX35/SX50 5bl Q-Prop, 137 mm | By the part’s name only. Confirm with your serial number. |
| Anode kit, both sides | SM195646 | Anode spare part kit for both sides SX35/50 | By the part’s name only. Confirm with your serial number. |
What the manual and listings say
It bolts to the outside of the hull through three small holes below the waterline. It fits a hull up to 50 mm thick without glass work. Sleipner's external page puts its external units on displacement and semi-planing boats up to 60 ft. The boat comes out of the water to fit it.
This is the proportional (PRO) version of the SX50, sold as a kit, for boats of 26 to 36 ft. It is rated 62 kg at 12 or 24 V and 50 at 10.5 or 21. This row is the 50 mm (2 in) hull-thickness version; Defender prices it separately, read 12 October.
Replacement and close alternatives
Sleipner names no replacement for it. The nearest current models are below.
These are Sleipner’s nearest current sizes by thrust, in any of its lines.
- Nearest below: Sleipner SX35 Compact Stern, 93 lb, $3,870 to $4,167.
- 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:
- Max Power CT45 stern pod, 99 lb, $3,275.
- DockStar Smart Thruster, stern, 90 lb, $4,270 to $4,570.