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Sleipner · retractable thruster · bow or stern
Sleipner SRHP650: specs, price and the boats it fits
It gives 1433 lb (650 kgf) of push. Sleipner sells it for boats of 82 to 151 ft. It runs on 24 V.
- Haul-out to install
- DIY 2 of 5: wiring prep only
- 2-year warranty
Not sold in the US right now. No US store or distributor lists the Sleipner SRHP650: we checked Imtra’s US catalog (the Sleipner distributor), Defender and Fisheries Supply on 15 October 2026. Its specs and parts stay here for owners of boats built or bought abroad. For one to buy here, see the models on the Sleipner (Side-Power) review that have a US price.
Quick stats
- Thrust 1433 lb 650 kgf, Sleipner's rating
- Boat length 82 to 151 ft Sleipner's own range
- Price per lb of thrust Not worked out It needs a price and a thrust figure
- Voltage 24 V As sold
- Battery Not published Ask the maker before wiring
- Run limit Not published Ask the maker before long use
- To install it Haul-out The boat comes out of the water
- Anodes $138.38 A change, at Fisheries Supply
About the Sleipner SRHP650
The SRHP650 is the largest retractable on this site: 1433 lb of push from counter-rotating twin propellers, driven by the boat’s hydraulics, for vessels of about 82 to 151 ft. Sleipner lists it for large yachts, sailboats and fast passenger ferries.
It needs a hydraulic supply of serious size; Sleipner publishes the flow and pressure, and your installer matches them to the pump. There is no published price. The unit alone weighs about 300 kg, so it is designed into a new build or a major refit. See the specs.
Read more
Variable speed control is standard, Sleipner fits a double locking system for the tube, and a flexible coupling protects the driveline. Like the SRHP240 it carries a heavy-duty and a light-duty thrust rating. The warranty is two years for leisure boats and transfers with the boat.
The full spec sheet for a yard sits lower down, and the Sleipner (Side-Power) review covers Sleipner’s whole range.
Sleipner sold its thrusters under the Side-Power name until 2021, and many dealers and owners still call them that. It is the same company and the same thrusters.
Where this summary comes from (2 sources, read 12 October 2026)
Will the Sleipner SRHP650 steer your boat?
80 FT TRAWLER · BOW · 15 KT WIND
Every knot figure here is wind speed, not boat speed or current.
On a 80 ft trawler the Sleipner SRHP650 (1433 lb) steers her in a 27 knot breeze. Her bow needs about 428 lb from a retractable to steer her in a 15 knot breeze.
The finder leaves it off her list. We found no US store that sells it, and the finder lists only units you can buy here.
The Sleipner SRHP650 on a trawler, by length
- 25 ft87 kt
- 30 ft73 kt
- 35 ft63 kt
- 40 ft55 kt
- 45 ft49 kt
- 50 ft44 kt
- 55 ft40 kt
- 60 ft37 kt
- 65 ft34 kt
- 70 ft31 kt
- 75 ft29 kt
- 80 ft27 kt
Outlined: the finder does not list it at that length (under 13 kt, far more than she needs, or outside Sleipner’s own length range).
- Under 10 kt
- 10 to 15 kt
- 15 to 20 kt: the sweet spot
- Over 20 kt: more than she needs
Prices are the low end of the installed total, from our estimate. For your own boat, drive and installer, the finder prices each unit.
Is it right for your boat?
Every kind of boat it fits, by length
| Boat | Full thrust at 15 knots | Still a fit, in lighter wind |
|---|---|---|
| Pontoon & tritoon | Not listed. A retractable drops down inside the hull, and a pontoon has no hull depth to drop into. | |
| Sailboat | No length. More thrust than the boat needs. | |
| Houseboat | 78 to 80 ft | None |
| Catamaran | No length. More thrust than the boat needs. | |
| Trawler | No length. More thrust than the boat needs. | |
| Motor yacht | No length. More thrust than the boat needs. | |
| Bass & flats | Not listed. A retractable needs hull depth to drop into, and these planing hulls have almost none forward. | |
| Wake & ski boats | Not listed. A retractable needs hull depth to drop into, and these planing hulls have almost none forward. | |
| Express cruiser | No length. More thrust than the boat needs. | |
| Center console | No length. More thrust than the boat needs. | |
The Sleipner SRHP650 against each kind of boat, in a 15 knot wind. Our sizing, from the finder’s own rules.
The first column is where one unit gives all the thrust the boat needs in 15 knots. The second is where the finder still lists it: the unit steers her in a 13 or 14 knot wind, within 15 percent of the 15 knot breeze this site sizes for. On a boat shorter than the first column’s shortest length, the unit is more than the boat needs.
How we size it
Our figure is the longest boat one unit can steer in a 15 knot wind. It is a range because each kind of boat catches the wind differently. The maker gives one range for every boat.
The table tries the Sleipner SRHP650 on each kind of boat, at every length that kind of boat is built in. The wind is 15 knots and the rules are the finder’s own. A length counts as a fit when the unit gives the thrust that boat needs at the bow and the maker lists it for that length.
A boat up to 10 percent past the maker’s range still counts here, as it does in the finder. So the table runs down to 78 ft, just past Sleipner’s own range (82 to 151 ft).
It is sized for one kind of boat here. For your own boat, the finder gives an answer that also counts your drive and who does the installing. The compare page sets this unit beside others.
What it costs installed
No US dollar price is published for the Sleipner SRHP650, so we build no total for it. The yard’s share of the job is on the cost page.
The sizing and the costs on this page are estimates, for guidance only and without warranty. They are no quote, and nobody has inspected your boat. Check them against the maker’s manual and your yard before you rely on them. Terms of use.
DIY breakdown
DIY levels
- Level 5: Owner install. No yard, no electrician.
- Level 4: You install it, electrician connects. You mount and wire it; a marine electrician makes the final connections.
- Level 3: Split with the yard. The yard does the below-waterline part; you do the wiring.
- Level 2: Wiring prep only. The yard installs the unit and does the hull work; you do the wiring prep.
- Level 1: Yard job. A qualified professional does all of it.
You Yard Electrician. The bar is labor hours; a haul-out is a note.
How we rate DIYYou: 4 to 16 hours Yard: 40 to 88 hours Electrician: 2 to 4 hours Plus a haul-out.
Your part needs:Heavy battery cableCrimping big lugs
Every step, and who does it
- Cut the hull and fit the housing and mechanism Yard 40 to 88 hours Nobody publishes an hours figure. Fisheries Supply says installation is significantly more expensive than a tunnel, and that is too loose to turn into a number. So this is the tunnel’s own banded figure plus a quarter, which keeps it above a tunnel as the distributors describe it.
- Mount the battery box, switch and fuse holder; run and secure the cables You 4 to 16 hours Our estimate. No maker times this step, and a first-time owner is slower than a yard, so the range is wide.
- Final connections at the battery and the motor, load test Electrician 2 to 4 hours Our estimate. Nobody publishes a time for the final connections and test on their own.
A qualified marine electrician should make the final connections and test them before first use. Hours are labor only.
Related videos
Two of Sleipner’s own videos, from its YouTube channel. They play only when you tap. A maker’s video is its pitch, so take any claim back to the figures on this page.
Know before you buy
What sets this model apart, what it costs to keep, and what to weigh.
Price per pound of thrust
There is no US price to divide by its thrust.
Controls
Gasket, bolts and anode with the unit. The panel, its cable, the fuse and main switch are bought.
Anodes
$138.38 a change- Anode (386 mm gear leg) (SM501180A): $138.38 at Fisheries Supply.
They sit below the waterline, so a change means a haul-out or a diver.
Service and warranty
Sleipner gives 2 years for leisure use and 1 for commercial use. It transfers to the next owner, and it starts no later than 18 months after the boat's first launch.
See Sleipner’s warranty Sleipner's warranty statement, effective 1 April 2022.Special mentions
Sleipner sells it for either end, so it can go at the bow or the stern.
Dealer prices at Fisheries Supply, read 26 October 2026.What to weigh
The boat comes out of the water to install it: it needs a large hull opening below the waterline.
No US dollar price is published for it, so we can work out no installed cost.
Parts for the Sleipner SRHP650
See the Sleipner SRHP650 manualThe US dealer number comes first, then Sleipner’s own. Prices are each dealer’s on the day shown, before shipping and tax. Check the plate on your motor before you order: some parts change with the tunnel size, the voltage or the year.
For the install what the box leaves you to buy
The manual button above opens it on the maker's product page. It has the hull, wiring and fuse figures for this model.
From Sleipner’s SE80 to SE150 installation guide, document 2687 rev 30, 2025, read 30 September 2026. We have not yet read the box list in this model’s own manual, so these lines come from Sleipner’s tunnel guide. A retractable unit brings its own housing, so there is no tunnel to buy.
- In the box
- The gasket, bolts and anode come with the unit. The SEP guides call the power controller "the included PPC unit".
- Bought separately
- The ANL fuse and a main switch ("must include"), the control panel with its own guide, the panel cable and the battery cable.
- Charging
- The word "charging" is not in any of the Sleipner guides we read. The battery is sized by cold cranking amps, and a battery near the thruster is suggested. How it gets charged is left to you and your installer.
The manual’s words, page 19: “For installations on large vessels with bow and stern thrusters or catamarans a dedicated battery for each thruster should be considered.”
A yard job adds these parts on top of the unit: $336 to $815 for the priced ones, at Fisheries Supply’s prices on 30 September 2026 and 26 October 2026, plus the batteries, cable and charger. The cost page has what every maker says about each part.
Outside the hull replacement parts in the water
Anode (386 mm gear leg)
The metal that wears away in the water so the drive does not. Sleipner calls it “Anode, aluminium”.
Propeller, left hand (386 mm tunnel)
The propeller on the drive. Sleipner calls it “Propeller, Q-Prop™ LH”.
Listed in the retract mechanical section of this model's page.
Propeller, right hand (386 mm tunnel)
The propeller on the drive. Sleipner calls it “Propeller, Q-Prop™ RH”.
Listed in the retract mechanical section of this model's page.
Inside the boat replacement parts on board
Replacement hydraulic motor
The electric motor that turns the propeller. Sleipner calls it “Hydraulic motor 50cc BentAxis”.
No part matches. Try the number without spaces, or the part’s name.
Spare part numbers come from Sleipner’s parts pages and manuals. A dealer may sell a part we have not priced. Search for the number.
Other sizes and close alternatives
The other makers listed are the nearest match each makes, of the same style and for the same end, within a quarter of its thrust. The compare page lists every model, and the thruster index lists every model with a page here.
For the yard and the installer
Every published figure, with its source.
Full spec sheet
| Thrust and motor | |
|---|---|
| Thrust | 1433 lb (650 kgf) As printed: Light duty: 650kg / 1433lbs; Heavy duty: 500kg / 1102lbs |
| Motor | 47 kW |
| Voltage | 24 V |
| Run limit | Not published |
| Installation | |
| Type | Retractable, drops down |
| End of the boat | Bow or stern |
| Tunnel diameter | 386 mm |
| What it does to the hull | Large hull opening below the waterline |
| Haul-out to install it | Yes |
| Maker’s boat length | 82 to 151 ft |
| Price and ordering | |
| Price | No US price published |
| Part number | SRHP650/386TC-BA5024 V control, 24 V DC (hydraulic drive) |
| Documents | |
| Manual | Installation manualon the maker's product page |
| The site’s review | Sleipner (Side-Power) review |
Every published figure the site holds for the Sleipner SRHP650, with where each came from.
Our notes from the manual and listings
In the box: Gasket, bolts and anode with the unit. The panel, its cable, the fuse and main switch are bought.
Our note
This retractable lives in a housing let into the hull through a large opening, and drops when used. It is a bigger yard job than a tunnel. It also has a mechanism to keep in order. It is hydraulic, for a boat with a hydraulic power pack, with 24 V controls. It is a 386 mm tunnel for boats of 82 to 151 ft, the largest retractable on the site. This is dealer-quoted gear the finder does not list.
Where each point above comes from
- Sleipner sells it for either end, so it can go at the bow or the stern.The maker's listing
- The boat comes out of the water to install it: it needs a large hull opening below the waterline.The mounting: a bore through the hull, or a housing recessed into it
- No US dollar price is published for it, so we can work out no installed cost.The maker and the dealers the database reads
Not sure this is the one? The thruster finder asks about your boat and prices every unit that fits.