Sleipner SE20 User manual

SLEIPNER AS
P.O. Box 519
N-1612 Fredrikstad
Norway
www.sleipnergroup.com
DOCUMENT ID:
REVISION:
DATE:
LANGUAGE:
Installation Guide
For DC Electric Thruster Models
SE20, SE25, SE30, SE40
EN
I M
5 611
13
2 0 21

25 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
DECLARATION OF CONFORMITY
Sleipner Motor AS
P.O. Box 519, Arne Svendsensgt. 6-8
N-1612 Fredrikstad, Norway
Declare that this product with accompanying standard control systems complies with the
essential health and safety requirements according to:
DIRECTIVE 2013/53/EU
DIRECTIVE 2014/30/EU
DIRECTIVE 2014/35/EU
MC_0020
(NB: Do not paint the anodes, sealing, rubber fi ttings or propeller shafts)
• Do not fi nish the inside of the tunnel with a layer of gel-coat/ topcoat or similar. There is only room for a thin coat of primer and two layers of anti-
• Do not store items close to the thruster motor. Any loose items near the thruster motor is a potential fi re hazard and can cause undesired short-
Bow Installation Instructions
Considerations and Precautions................................................ 3
Thruster Measurements .......................................................... 4
Thruster Specications.............................................................. 5
Technical Specications .......................................................... 5
Positioning of the tunnel / thruster............................................. 6
Tunnel Length............................................................................ 7
Tunnel installation in sail boats.................................................. 8
Water Deection ........................................................................ 9
Tunnel ends............................................................................. 10
Tunnel installation............................................................. 11 - 12
Stern tunnel installation ........................................................... 13
Thruster Installation Instructions
Considerations and Precautions.............................................. 14
Gear Leg & Motor Bracket Installation..................................... 15
Propeller Installation................................................................ 16
Motor Installation ..................................................................... 17
Thruster Electrical Installation ................................................. 18
Electrical Specications .......................................................... 19
Control Panel Cable Installation ............................................. 20
Visual Wiring Diagram ............................................................ 21
Technical Wiring Diagram ............................................... 22 - 23
Control Panel Installation ........................................................ 24
Pre-delivery Checklist .......................................................... 25
Service and Support ...................................................... 26
Product Spare Parts and Additional Resources ............... 26
Warranty statement ...................................................... 26
Products
SE20/110S - SE20 Tunnel thruster, 12V
SE25/110S - SE25 Tunnel thruster, 12V
SE30/125S2 - SE30 Tunnel thruster, 12V
SE40/125S2 - SE40 Tunnel thruster, 12V
Contents
EN
When installing Sleipner equipment follow the outlined regulations/ classifi cation rules (electrical/ mechanical) according to
mechanic regulations/ classifi cation rules.
Follow all health and safety laws in accordance with their local outlined regulations/ classifi cation rules.
The recommendations made in this manual are guidelines ONLY, and Sleipner Motor AS (Sleipner) strongly recommend that before
installation, advice is obtained from a naval architect familiar with the particular vessel and regulations/ classifi cations.
This manual is intended to support educated/ experienced staff and is therefore not suffi cient in all details for professional

3
5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
MC_0031
Bow Installation Considerations and Precautions
EN
• The thruster must NOT be installed in compartments that require ignition proof electric equipment. If necessary, make a separate compartment.
(NB: Ignition Protected systems are tested to be installed in areas with possible explosive gases in accordance with ISO 8846)
• The electro motor will generate some carbon dust so any storage compartments must be separated from the thruster to prevent nearby items
becoming dusty/ dirty. (NB: IP version motors generate dust but are enclosed.)
• When installing the thruster electro motor in small compartments, ensure the compartment is well ventilated to allow for cooling of the electro
motor.
• If the height of the room you are installing the thruster is limited, the thruster can be installed horizontally or at any angle in-between.
- If the electro motor is positioned more than 30 degrees off vertical, it must be supported separately.
- Beware of keeping installation within advised measurements. No part of the propeller or gear house must be outside the tunnel.
• Do not install the thruster in a position where you need to cut a stiffener/ stringer/ support that may jeopardise the hull integrity without checking
with the boat builder this can be done safely.
• The electro motor, components and cables must be mounted so they remain dry at all times.
• We advise painting the gear house and propellers with anti-fouling. (NB: Do not paint the anodes, sealing, rubber fi ttings or propeller shafts)
• Do not fi nish the inside of the tunnel with a layer of gel-coat/ topcoat or similar. There is only room for a thin coat of primer and two layers of anti-
fouling between the tunnel and the props.
• Don’t install the electro motor close to easily flammable objects or equipment as it will reach over 100°C before the temperature switch is activated.
• Do not store items close to the thruster motor. Any loose items near the thruster motor is a potential fi re hazard and can cause undesired short-
circuiting.
It is the installers responsibility
When installing Sleipner equipment follow the outlined regulations/ classifi cation rules (electrical/ mechanical) according to
international or special national regulations. Instructions in this guide cannot be guaranteed to comply with global electric/
mechanic regulations/ classifi cation rules.
Follow all health and safety laws in accordance with their local outlined regulations/ classifi cation rules.
Before installation, it is important that the installer reads this guide to ensure necessary acquaintance with the product.
The recommendations made in this manual are guidelines ONLY, and Sleipner Motor AS (Sleipner) strongly recommend that before
installation, advice is obtained from a naval architect familiar with the particular vessel and regulations/ classifi cations.
This manual is intended to support educated/ experienced staff and is therefore not suffi cient in all details for professional
installation. (NB: These instructions are only general instruction. If you are not skilled to do this work, please contact professional
installers for assistance.)
All electrical work must be done by a licensed professional.
Faulty installation of Sleipner products will render all warranty given by Sleipner Motor AS void. MC_0038
MC_0257
Thruster Installation Considerations and Precautions
EN
Before installation, it is important that the installer reads this guide to ensure necessary acquaintance with this product.
• The electro motor must be handled with care. Do not lift it by internal cable connections, main terminals or placed down on the drive shaft.
• The thruster power supply circuit must include the recommended sized fuse and a battery isolation switch.
• Never run the thruster out of water.
• It is important to follow the guidelines in this manual. Failure can result in severe damage to the thruster.

45 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
MC_0121
Thruster Measurements
EN
Measurement
code Measurement description mm inch mm inch mm inch mm inch
ID Internal tunnel diameter 110 4.33 110 4.33 125 4.92 125 4.92
T (min) Tunnel thickness min. 4 0.16 4 0.16 4 0.16 4 0.16
T (max) Tunnel thickness max. 6 0.24 6 0.24 6 0.24 6 0.24
TL Minimum tunnel length 111 4.37 111 4.37 111 4.37 111 4.37
TL (recommended)Recommended tunnel length 133 5.24 133 5.24 136 5.35 136 5.35
WD Minimum water depth 110 4.33 110 4.33 125 4.92 125 4.92
H Motor Height 209 8.23 252 9.92 263 10.35 263 10.35
W Motor width 200 7.87 198 7.80 199 7.83 206 8.11
L Motor length 183 7.20 183 7.20 183 7.20 183 7.20
*20
*Valid for SE & SEP
*25 *30 *40
MG_0079
TL
WD
H
WL
ID
T
Tunnel centre line
Propeller position will
vary with each thruster
model
The gear leg/ propeller(s) must
never extend out of the tunnel
Single Propeller

5
5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
MC_0051
Technical Specifi cations
EN
Motor: Custom made reversible DC-motor.
Gear house: Seawater resistant bronze. Ball-bearing at propeller shaft and a combination of ball bearing and slide bearing at drive shaft.
(Pre-fi lled and sealed for life)
Motor bracket: Glass fi bre reinforced composite material. Brass thread inserts.
Tunnel: Cross spun with rowing G.R.P tunnel
Steel & aluminium tunnels available at request.
Propeller: 5-blade skewback “Q-prop” propeller, fi breglass reinforced composite.
Batteries: Minimum recommended battery capacity (cold crank capacity by DIN/SAE standard)
Contact a battery supplier for more information.
Max. Use: 2 - 3 min. duty cycle at 20°C
Safety features: - Electronic time-lapse device protects against sudden change of drive direction.
- The electric thermal cut-off switch in electro motor protects against overheating (auto-reset when electro motor cools down).
- Flexible coupling between electro-motor and drive shaft protects electro motor and gear system if propeller jams.
- Original Sleipner panels shut off automatically 6 minutes after last use. This interval can be adjusted in 5 min steps up to 60
minutes or turned off completely.
- Original Sleipner panels use child-safe double ON buttons.
- An integrated microprocessor monitors solenoids, reduce wear and risk of solenoid lock-in.
- Auto-stop of the thruster occurs when an undesirable solenoid lock-in occurs or when continuous operation cut-off timer
exceeds 3 minutes.
T (min)
T (max)
TL (r )
MC_0135
Thruster Specifi cations
EN
Description * 20 * 25 * 30 *40
Available DC System (v) 12v 12v 12v 12v
Thrust 12v or 24v (kg * lbs) 25 kg * 55 lbs 30 kg * 66 lbs 40 kg * 88 lbs 48 kg * 105 lbs
Thrust 10.5v or 21v (kg * lbs) 20 kg * 44 lbs 25 kg * 55 lbs 30 kg * 66 lbs 40 kg * 88 lbs
Typical Boat Size (m * ft) > 7m * >23ft > 7m * >23ft 6m - 8m * 20ft - 28ft 8m - 10.5m * 26ft - 34ft
Propulsion System Single Single Single Single
Power (kw * Hp) 1.5kw * 2hp 1.5kw * 2hp 1.5kw * 2hp 2.2kw * 3hp
Weight (kg * lbs) 9.5kg * 21lbs 9.5kg * 21lbs 9.5kg * 21lbs 10kg * 22lbs
*Valid for SE / SE IP & SEP / SEP IP

65 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
important
MG_0001
A
B
Pivot
point
1
Ø
2
Lowered rotation power performance
Stronger rotation power performance
min 1/4
Ø
(Recommended)
min 1/4
Ø
(Recommended)
WD
Water line
Positioning of the tunnel / thruster
EN MC_0003
Aim to install the thruster as far forward as possible (1)
Due to the leverage effect around the boats’ pivot point. The distance difference from the boat pivots’ point to the thruster will determine the amount
of real rotation power for the boat.
Aim to install the thruster as deep as possible under the waterline (2)
Deeper installations prevent air from being sucked into the tunnel from the surface, resulting in reduced thrust performance and increase noise levels
during operation. Deeper installations increase water pressure for maximum effi ciency from the thruster.
The centre of the tunnel should be a minimum of 1 x the tunnel diameter below the waterline. The installer must make evaluations based on thruster
performance, boat type and operating conditions. As a general recommendation, the position of the tunnel should not be a minimum of 1/4 of the
diameter of the tunnel from the boat keel. (NB: This can be overlooked depending on the installation methods defi ned in this manual.)

7
5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
MC_0003
1
2
3
4 65
MG_0048
Increase tunnel length to protect
the propeller from water forces
when high-speed cruising.
Water
Forces
Increase tunnel length to
prevent a circular water vacuum
cavity between the propeller and
the hull of the boat.
STANDARD USE FLAT BOTTOM HULL HIGH-SPEED OPERATION
Do not allow the variable length of the tunnel walls to vary in length
excessively.
EG. the top tunnel wall is x 4 longer than the bottom wall.
Cavitation
Water flow must have
space to "straighten"
itself for best
performance.






The gear leg/ propeller(s) must
never extend out of the tunnel
Tunnel Length
EN
Optimal tunnel length
Achieving the correct tunnel length depends on many factors from the hull type, operation and environmental conditions.
Tunnels should avoid being longer than 4 x the tunnel diameter as this will reduce thruster performance. (NB: Installing long length tunnels can flex/
bend over time and may require additional support. Consult with a naval architect.)
1. Do not allow the variable length of the tunnel walls to vary in length excessively.
EG. the top tunnel wall is x 4 longer than the bottom wall.
2. If the tunnel is too long, the friction inside will reduce the water speed and thereby the thrust.
3. If the tunnel is too short (typically only in the bottom section of the tunnel) cavitation problems can occur as water flow will not be able to
“straighten” itself before reaching the propeller. This cavitation will reduce performance and increase noise during operation.
Thruster within the tunnel
It is important the propellers and the lower unit/ gear leg must be entirely inside the thruster tunnel. Propellers that protrude from the tunnel will not
perform as intended.
4. Standard Use
Tunnel length must be long enough to ensure the propellers are not extruding the tunnel.
5. Flat Bottom Hull
Tunnel lengths must be longer than the standard measurement outlined within the manual to ensure a circular vacuum is not created between the
thruster and the bottom of the boat.
6. High-Speed Boats
Tunnel lengths must be increased to protect the propeller from damage when crashing against the water surface during high-speed cruising. (NB:
This can include the length of a spoiler)
during operation. Deeper installations increase water pressure for maximum effi ciency from the thruster.
(NB: This can be overlooked depending on the installation methods defi ned in this manual.)

85 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40


4. The thruster propeller can spin (passively) producing noise while sailing or cruising as water is forced through the tunnel. Water-flow directed
MG_0004
Min
Pos. B
Pos. A

1






Tunnel installation in sailboats
EN
Some sail boats have a flat bottom and shallow draft in the bow section. This can make installing the thruster as far forward from the boats main pivot
point diffi cult. (Fig. 1).
However, it is possible to install a tunnel thruster in most sail boats, even when the hull does not directly support the fi tting of a tunnel.
Instead fi t the tunnel halfway into the underneath section of the existing hull. Strengthen it with a deflector/ spoiler directing the water flow around
the tunnel. This will allow installation of the thruster in the proper position on the boat, maintaining the reliability and space advantages of the tunnel
thruster.
This installation is being used by some of the world’s largest sail boat builders and has proven to give little to no speed loss during normal cruising.
This can also be an installation method for flat bottomed barges to avoid extremely long tunnels and large oval tunnel openings in the hull.
MC_0003

9
5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
MG_0003
High water force
while underway
High water force
while underway
from wave contact


1 2 3
4
Water Deflection
EN MC_0003
1. A possible problem in sail boats or fast powerboats is that a non-rounded surface can generate drag from the back face of the tunnel, as it creates
a
“flat” area facing the flow of water (1).
This problem can be solved in two different ways, depending on what is possible or easier to perform.
2. The best solution which generally reduces the most drag is to make a recess in the hull at the back of the tunnel. As the back face is removed
water can flow freely past the tunnel entry. The depth and shape of this recess will depend on the boat and the angle facing up/ down aft of the
tunnel insert. Normally it is angled slightly down because of the water flow on this area (2).
3. Making a deflector/ spoiler in front and underneath the tunnel can also reduce damage to the thruster and drag. The deflector/ spoiler will push
the water flow out from the hull so water can pass by the back face of the tunnel. The shape and size of this deflector/ spoiler will depend on the
hull shape. The easiest way of making the deflector/ spoiler is to retain a part of the lower forward area of the tunnel while installing the tube. Use
this area as support to mould a soft curve/spoiler shape from the hull. (3).
4. The thruster propeller can spin (passively) producing noise while sailing or cruising as water is forced through the tunnel. Water-flow directed
through the tunnel at high speeds, during turning or as the boat bumps waves while underway can also damage the thruster (4).
(NB: As a rule, you should not see the back face of the tunnel when standing directly in front of the boat looking aft.)








point diffi cult.
However, it is possible to install a tunnel thruster in most sail boats, even when the hull does not directly support the fi tting of a tunnel.
Instead fi t the tunnel halfway into the underneath section of the existing hull. Strengthen it with a deflector/ spoiler directing the water flow around

10 5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
8 x layers of fiberglass
8 x layers of fiberglass
fiberglass
fiberglass
*Fiberglass
Hull
*Steel/
Aluminium
Hull
Hull
Hull
Hull
Tunnel
Tunnel
Tunnel
Welding
fiberglass
Additional Layers of
fiberglass and resin
Additional Layers of
fiberglass and resin
Hull
2. Mark the circle for the tunnel opening (outside diameter of the tunnel) and cut the hole.
3. Grind off the gel coat to the “real fi breglass” area 12cm around the hole on both inside and outside the hull to cast the tunnel to the hull
4. Insert the tunnel and mark its shape to fi t the hull. (NB: if you are installing with a deflector/ spoiler, leave a part of the tunnel in the front and
underside of the tunnel that will cover the back face.)
fi breglass. (NB: Do not cast or add fi breglass to the area were the thruster will be placed.)
6. Cast the tunnel to the inside of the hull, use at least eight layers of 300g fi breglass and resin, preferably alternating mat and rowing types of
fi breglass. To round the tunnel ends to a 10% radius make further layers inside to preserve the desired hull thickness.
(NB: Ensure gaps between the tunnel and the hull are completely fi lled with resin/ fi breglass. In areas where you can not access to make
layers of resin/ fi breglass, a resin/ fi breglass mixture must be used in that area.)
We recommend that a professional does the fi breglass, steel or aluminium fi tting of the tunnel. These instructions are only general
instructions and do not explain in any way the details of fi breglass work. Problems caused by faulty installation of the tunnel, are the
MG_0002
R = 0,1 x D (10%)
D


12
3
Angled tunnel ends for
steel/ aluminium hulls
Cavitation


Tunnel Ends
EN MC_0003
Rounded tunnel ends will maximise thrust and minimise noise and cavitation.
For best performance round the tunnel connection to the hull-side as much as possible. The minimum rounding has a radius of 10% of the diameter of
the tunnel.
Signifi cant advantages of a rounded tunnel over a sharp tunnel to hull connections are:
1. A rounded tunnel end will prevent the creation of turbulence/ cavitation created from a sharp tunnel end when water passes by the tunnel.
- The turbulence/ cavitation will block the outer area of the tunnel and thereby reduces the effective tunnel diameter and thrust.
- Turbulence/ cavitation on the propeller will lessen the thrusters performance and create excess noise.
2. For steel/ aluminium hulls angled tunnel ends also offer similar performance as a rounded connection.
3. A rounded tunnel end makes the thruster draw water from along the hull-side, creating a vacuum that will suck the boat sideways and thereby give
additional thrust.
- With a sharp tunnel end, the thruster will be unable to take water from along the hull-side, and you will not gain the desired vacuum and
additional thrust. This “free” extra thrust in optimal installations be 30 - 40% of the total thrust.
(NB: A Side-power thruster propeller does not produce cavitation at working speed. Therefore, any cavitation and cavitation noise in the tunnel will
be caused during improper tunnel installation.)

11
5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
MG_0005
R
D
1 2
34
6
5
8 x layers of fiberglass
and resin
8 x layers of fiberglass
and resin
fiberglass
fiberglass
*Fiberglass
Hull
*Steel/
Aluminium
Hull
Hull
Hull
Hull
Tunnel
Tunnel
Tunnel
Welding
fiberglass
Additional Layers of
fiberglass and resin
Additional Layers of
fiberglass and resin
Hull
Tunnel Installation
EN
1. Find the position in the boat considering the information earlier in this manual and the applicable measurements for the thruster model you are
installing. Mark the centre of the tunnel on both sides of the hull. Drill a hole horizontally at these marks.
2. Mark the circle for the tunnel opening (outside diameter of the tunnel) and cut the hole.
3. Grind off the gel coat to the “real fi breglass” area 12cm around the hole on both inside and outside the hull to cast the tunnel to the hull (Fig. 3).
4. Insert the tunnel and mark its shape to fi t the hull. (NB: if you are installing with a deflector/ spoiler, leave a part of the tunnel in the front and
underside of the tunnel that will cover the back face.)
5. Cut the tunnel ends to the desired shape and lightly sand its surface. Clean the area with acetone or similar where you are going to apply
fi breglass. (NB: Do not cast or add fi breglass to the area were the thruster will be placed.)
6. Cast the tunnel to the inside of the hull, use at least eight layers of 300g fi breglass and resin, preferably alternating mat and rowing types of
fi breglass. To round the tunnel ends to a 10% radius make further layers inside to preserve the desired hull thickness.
(NB: Ensure gaps between the tunnel and the hull are completely fi lled with resin/ fi breglass. In areas where you can not access to make
layers of resin/ fi breglass, a resin/ fi breglass mixture must be used in that area.)
MC_0003
IMPORTANT
We recommend that a professional does the fi breglass, steel or aluminium fi tting of the tunnel. These instructions are only general
instructions and do not explain in any way the details of fi breglass work. Problems caused by faulty installation of the tunnel, are the
installers full responsibility.




For best performance round the tunnel connection to the hull-side as much as possible. The minimum rounding has a radius of 10% of the diameter of
Signifi cant advantages of a rounded tunnel over a sharp tunnel to hull connections are:
additional thrust. This “free” extra thrust in optimal installations be 30 - 40% of the total thrust.
(NB: A Side-power thruster propeller does not produce cavitation at working speed. Therefore, any cavitation and cavitation noise in the tunnel will

12 5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
8 x layers of fiberglass
8 x layers of fiberglass
MG_0006
R = D x 0,1
R = D x 0,1
Dx0,1-0,15
Dx0,1-0,15
D
Layers of
fiberglass
and resin
Layers of
fiberglass
and resin
*Fiberglass
Hull
*Steel/
Aluminium
Hull
Hull
Hull
Hull
Tunnel
Tunnel
Tunnel
Welding
Layers of
fiberglass
and resin
Additional Layers of
fiberglass and resin
Additional Layers of
fiberglass and resin
Hull
1 3
4
2
IMPORTANT
Avoid all casting where the motor-bracket is to be placed, as this will cause misfi t and possible failure to the gear house.
Tunnel Installation
EN
With tunnel installed and cast.
1. Round the edges with a radius of 10% of the tunnel diameter.
2. For steel/ aluminium hulls make a slope with a length of 10-15% of the tunnel diameter.
(NB: If this is not possible, round the tunnel end as much as possible.)
3. Additionally cast two layers on the outside of the tunnel/ hull in a 10cm area
4. Follow the same method if making the deflector/ spoiler.
You must apply gel coat to areas you have grounded/ moulded to make waterproof. These areas allow water access to the hull which is typically not
waterproof without these applications outside. (NB: All original Side-Power tunnels are fully waterproof when delivered except in the areas where
you have cut and bonded it to the hull.)
MC_0003

13
5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
Stern Tunnel Installation
EN
Stern thruster installation has extra considerations and precautions and thruster installation procedures.
See the attached manual supplied in the stern thruster kit
MC_0003
Stern Thruster
Installation Guide
8 x layers of fiberglass
8 x layers of fiberglass
fiberglass
fiberglass
*Fiberglass
Hull
*Steel/
Aluminium
Hull
Hull
Hull
Hull
Tunnel
Tunnel
Tunnel
Welding
fiberglass
Additional Layers of
fiberglass and resin
Additional Layers of
fiberglass and resin
Hull
Avoid all casting where the motor-bracket is to be placed, as this will cause misfi t and possible failure to the gear house.
1. Round the edges with a radius of 10% of the tunnel diameter.
2. For steel/ aluminium hulls make a slope with a length of 10-15% of the tunnel diameter.
(NB: If this is not possible, round the tunnel end as much as possible.)
(NB: All original Side-Power tunnels are fully waterproof when delivered except in the areas where

14 5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
MC_0031
Bow Installation Considerations and Precautions
EN
• The thruster must NOT be installed in compartments that require ignition proof electric equipment. If necessary, make a separate compartment.
(NB: Ignition Protected systems are tested to be installed in areas with possible explosive gases in accordance with ISO 8846)
• The electro motor will generate some carbon dust so any storage compartments must be separated from the thruster to prevent nearby items
becoming dusty/ dirty. (NB: IP version motors generate dust but are enclosed.)
• When installing the thruster electro motor in small compartments, ensure the compartment is well ventilated to allow for cooling of the electro
motor.
• If the height of the room you are installing the thruster is limited, the thruster can be installed horizontally or at any angle in-between.
- If the electro motor is positioned more than 30 degrees off vertical, it must be supported separately.
- Beware of keeping installation within advised measurements. No part of the propeller or gear house must be outside the tunnel.
• Do not install the thruster in a position where you need to cut a stiffener/ stringer/ support that may jeopardise the hull integrity without checking
with the boat builder this can be done safely.
• The electro motor, components and cables must be mounted so they remain dry at all times.
• We advise painting the gear house and propellers with anti-fouling. (NB: Do not paint the anodes, sealing, rubber fi ttings or propeller shafts)
• Do not fi nish the inside of the tunnel with a layer of gel-coat/ topcoat or similar. There is only room for a thin coat of primer and two layers of anti-
fouling between the tunnel and the props.
• Don’t install the electro motor close to easily flammable objects or equipment as it will reach over 100°C before the temperature switch is activated.
• Do not store items close to the thruster motor. Any loose items near the thruster motor is a potential fi re hazard and can cause undesired short-
circuiting.
It is the installers responsibility
When installing Sleipner equipment follow the outlined regulations/ classifi cation rules (electrical/ mechanical) according to
international or special national regulations. Instructions in this guide cannot be guaranteed to comply with global electric/
mechanic regulations/ classifi cation rules.
Follow all health and safety laws in accordance with their local outlined regulations/ classifi cation rules.
Before installation, it is important that the installer reads this guide to ensure necessary acquaintance with the product.
The recommendations made in this manual are guidelines ONLY, and Sleipner Motor AS (Sleipner) strongly recommend that before
installation, advice is obtained from a naval architect familiar with the particular vessel and regulations/ classifi cations.
This manual is intended to support educated/ experienced staff and is therefore not suffi cient in all details for professional
installation. (NB: These instructions are only general instruction. If you are not skilled to do this work, please contact professional
installers for assistance.)
All electrical work must be done by a licensed professional.
Faulty installation of Sleipner products will render all warranty given by Sleipner Motor AS void. MC_0038
MC_0257
Thruster Installation Considerations and Precautions
EN
Before installation, it is important that the installer reads this guide to ensure necessary acquaintance with this product.
• The electro motor must be handled with care. Do not lift it by internal cable connections, main terminals or placed down on the drive shaft.
• The thruster power supply circuit must include the recommended sized fuse and a battery isolation switch.
• Never run the thruster out of water.
• It is important to follow the guidelines in this manual. Failure can result in severe damage to the thruster.

15
5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
Place top motor
bracket and bolt plate
Measure the drive
shaft has come
through the motor
bracket at the correct
height with the
template supplied.
MG_0049
Tunnel
centre line
Tunnel
centre line
Boats
centre line
Boats
centre line
Bow
Stern
B
ØC
ØA
Apply MS Polymer
sealant or equal to
both sides of the
gasket
Motor bracket
Gasket
Ensure propeller
turns without
obstruction
Motor bracket
Bolt plate
IMPORTANT
Do not apply sealant to
the holes.
Measurement
Description mm inch mm inch
ØA29 1.14 29 1.14
B20 0.79 20.5 0.81
ØC7 0.28 9 0.35
SE*P 20
SE*P 25
SE*P*IP 30
SE*P*IP 40
BOW
*P- Propositional
*IP- Ignition Protected
6 - 7 8
SE*P 20
SE*P 25
FASTEN
(12 Nm)
(8.85 lb/ft)
SE*P*IP 30
SE*P*IP 40
FASTEN
(18 Nm)
(13.28 lb/ft)
5
12 - 4
STARBOARD
BOW
BOW
BOW BOW
MC_0258
Gear Leg & Motor Bracket Installation
!Please refer to the graphic for special considerations relating to your model !
EN
1. Mark the tunnel centreline and the boat’s centreline. (NB: Install the gear leg and propeller as shown above for the thrust direction to correspond
with the control panel.)
2. Use the gasket or template (recommended) to mark the hole centres and double-check the measurements. One hole MUST be placed using
the boat centreline as shown above. (NB: All holes must be in-line with the tunnels’ centreline for correct installation, clearance between the
propeller and the tunnel is minimal.)
3. Smooth the surface of the tunnel. A rough surface will cause possible failure/ movement of the gear leg. The motor bracket must rest steadily on
the tunnel.
4. Drill the main centre hole followed by the two screw-holes.
5. Place the gear leg (without the propeller) with the gasket on inside the tunnel. Place the propeller on the gear leg to ensure it is centred and
rotates freely with the same clearance from each blade to the tunnel wall. Place top motor bracket to measure the drive shaft has come through
the motor bracket at the correct height. Remove the gear leg and propeller for fi nal installation.
6. Apply appropriate sealant to both sides of the gasket and place on the gear leg. Place the gear leg in the tunnel (without the propeller).
7. Install the top motor bracket and gear leg gently together. Use appropriate sealant to ensure that no leakages occur. (NB: See your sealant data
sheet for the correct application process.)
8. Fasten the gear leg and the motor bracket with the bolts provided. Tighten to torque as shown above.
(NB: Do not paint the anodes, sealing, rubber fi ttings or propeller shafts)
• Do not fi nish the inside of the tunnel with a layer of gel-coat/ topcoat or similar. There is only room for a thin coat of primer and two layers of anti-
• Do not store items close to the thruster motor. Any loose items near the thruster motor is a potential fi re hazard and can cause undesired short-
When installing Sleipner equipment follow the outlined regulations/ classifi cation rules (electrical/ mechanical) according to
mechanic regulations/ classifi cation rules.
Follow all health and safety laws in accordance with their local outlined regulations/ classifi cation rules.
The recommendations made in this manual are guidelines ONLY, and Sleipner Motor AS (Sleipner) strongly recommend that before
installation, advice is obtained from a naval architect familiar with the particular vessel and regulations/ classifi cations.
This manual is intended to support educated/ experienced staff and is therefore not suffi cient in all details for professional

16 5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
Propeller Installation
EN
1. Insert the propeller onto the shaft spine. Rotate the propeller until the shaft spline aligns with the internal spline in the propeller.
2. Insert the washer to the end of the shaft spline. Fasten with the propeller lock-nut.
3. Apply anti-fouling to the gear leg and propeller. Do not apply anti-fouling to any rubber elements of the gear leg or anodes.
MC_0017
!Please refer to the graphic for special considerations relating to your model !
MG_0050
Shaft Spline
Anti-fouling
Propeller
Washer
Holding Screw

17
5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
Motor Installation
EN
1. Insert the drive pin to the motor drive shaft. Insert the coupling to align with the drive pin in the motor shaft.
2. Install the motor onto the motor bracket ensuring the couplings are engaged together correctly (top and bottom). (NB: The motor can be placed
in all directions on the motor bracket. However, ensure the cable terminals are accessible for electrical installation later.)
3. If you are installing the motor at an angle of more than 30 degrees off vertical, the motor will require separate/ additional support. (NB: Do not
position supports on the motors top cap.)
4. Fasten the bolts holding the motor to the motor bracket with the above torque.
5. Check the drive shafts are engaged by rotating the propeller. (NB: Rotating the propellers can be hard due to the gear reduction and the motor,
however the propeller must be able to rotate via hand power.)
MC_0043
!Please refer to the graphic for special considerations relating to your model !
IMPORTANT
The thruster motor assembly must be protected using suitable covering to avoid dust/debris ingress from fabrication/maintenance/shipbuilding
operations. On completion of operations, the cover must be removed before operating the thruster.
MG_0051
1 2
3
4
IMPORTANT
Do not position support
on the motor cap.
FASTEN
(18 Nm)
(13.28 lb/ft)
Motor support
Motor
Cap
> 30°
Turn gear leg shaft so
the motor coupling
fits into the slots.
Drive Pin

18 5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
MG_0019
Thruster
Motor
Battery
12V or
24V
Fuse
Main
switch
Hold in place
for securing
the end nut.
(M8) Nut
Tighten to *max
13 Nm (9.59 lb/ft)
(M10) Nut
Tighten to *max
23 Nm (16.96 lb/ft)
Multi-lug configuration
Ensure lug faces are
back to back.
Spring
washer
Spring
washer
NutNut
Lugs
Lugs
++
--
IMPORTANT
Do NOT use washers between lugs, this
causes overheating and fire. Spring
washers must be placed in the outer
position before tightening the nut.
MC_0143
Thruster Electrical Installation
EN
WARNING
Check the following with the main switch is set to off :
After all electrical connections have been completed check with an ohm meter that there is no electrical connection between
1. electro-motor flange and the positive terminal on the motor
2. electro-motor flange and the battery negative terminal on the motor
If unsure contact skilled personnel.
1. Information of electrical table. see next page
- All power cable lengths represent the total length of the combined (+) and (-) cables.
- Battery capacity is stated as minimum cold crank capacity, (CCA).
- Use slow blow rated fuses to hold stated Amp-Draw for min. 5 minutes.
- Consider the AMP hours (Ah) for your specifi c duty cycle.
2. Use appropriate sized cables and batteries with high cranking capacity to feed the thruster. The actual voltage at the motor while running the
thruster decides the motors output RPM and thrust. Use larger cables and stronger batteries for better results.
- See electrical specifi cations for advised minimum cables and batteries (CCA).
3. Install the main switch as close to the battery as possible and ensure the main positive lead can take loads without noticeable voltage drop.
- Ensure the main switch (battery isolator) can be turned off independently and manually when not on board or in emergencies.
- Ensure it is easily accessible and update instructions that this should be turned off like the boat’s other main switches.
It is advised to install a fuse in the positive lead for protection against short-circuiting.
- Ensure a slow type and appropriately sized to take the amperage draw for at least 5 minutes.
(NB: For Ignition Protected installations remember to use ignition protected fuses and switches if fi tted in areas that require this feature.
Ensure to follow your national regulations)
5. Cable lugs must have adequate electrical and mechanical isolation and fi tted with cable lug covers.
6. Fasten cables to the required torque.
!Please refer to the graphic for special considerations relating to your model !

19
5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
Electrical Specifi cations
EN MC_0044
*Valid for DC motors
Model Size System
Voltage
Nominal
current
draw
Min. battery
CCA Rec. fuse
<7m total + & - 7-14m total + & - 15-21m total + & - 22-28m total + & - 28-35m total + & - 36-45m total + & -
Min. Rec. Min. Rec. Min. Rec. Min. Rec. Min. Rec. Min. Rec.
*20/110S 12 V 150 A
DIN: 200
SAE: 380
EN: 330
ANL 150
mm2 25 35 35 50 50 70 70 95 95 95 120 2 x 70
AWG 3 2 2 1/0 1/0 2/0 2/0 3/0 3/0 3/0 2 x 4/0 2 x 2/0
*25/110S 12 V 200 A
DIN: 200
SAE: 380
EN: 330
ANL 150
mm2 25 35 50 50 70 70 95 95 120 120 2 x 70 2 x 70
AWG 3 2 1/0 1/0 2/0 2/0 3/0 3/0 4/0 4/0 2 x 2/0 2 x 2/0
*30/125S
*30/140 12 V 245 A
DIN: 200
SAE: 380
EN: 330
ANL 150
mm2 35 50 50 70 70 95 95 120 120 2 x 70 2 x 70 2 x 95
AWG 2 1/0 1/0 2/0 2/0 3/0 3/0 4/0 4/0 2 x 2/0 2 x 2/0 2 x 3/0
*40/125S
*40/140 12 V 315 A
DIN: 300
SAE: 570
EN: 520
ANL 250
mm2 35 50 70 95 95 120 120 2 x 70 2 x 95 2 x 95 2 x 120 2x 120
AWG 2 1/0 2/0 3/0 3/0 4/0 4/0 2 x 2/0 2 x 3/0 2 x 3/0 2 x 4/0 2 x 4/0
*50/140S
12 V 370 A
DIN: 350
SAE: 665
EN: 600
ANL 325
mm2 50 50 70 95 120 2 x 70 2 x 70 2 x 95 2 x 95 2 x 120 2 x 120 2 x 120
AWG 1/0 1/0 2/0 3/0 4/0 2 x 2/0 2 x 2/0 2 x 3/0 2 x 3/0 2 x 4/0 2 x 4/0 2 x 4/0
24 V 170 A
DIN: 175
SAE :332
EN: 280
ANL 150
mm2 25 25 25 35 35 50 35 50 50 70 70 70
AWG 3 3 3 2 2 1/0 2 1/0 1/0 2/0 2/0 2/0
*60/185S
*60/140
12 V 370 A
DIN: 350
SAE: 665
EN: 600
ANL 325
mm2 50 50 70 95 120 2 x 70 2 x 70 2 x 95 2 x 95 2 x 120 2 x 120 2 x 120
AWG 1/0 1/0 2/0 3/0 4/0 2 x 2/0 2 x 2/0 2 x 3/0 2 x 3/0 2 x 4/0 2 x 4/0 2 x 4/0
24 V 170 A
DIN: 175
SAE: 332
EN: 280
ANL 150
mm2 25 25 25 35 35 50 35 50 50 70 70 70
AWG 3 3 3 2 2 1/0 2 1/0 1/0 2/0 2/0 2/0
*80/185T
12 V 530 A
DIN: 550
SAE: 1045
EN: 940
ANL 400
mm2 70 70 120 2 x 70 2 x 95 2 x 95 2 x 120 2x 120 2 x 120
NA NA NA
AWG 2/0 2/0 4/0 2 x 2/0 2 x 3/0 2 x 3/0 2 x 4/0 2 x 4/0 2 x 4/0
24 V 280 A
DIN: 300 SAE:570
EN: 520
ANL 250
mm2 35 35 35 50 50 70 70 95 95 120 120 2 x 95
AWG 2 2 2 1/0 1/0 2/0 2/0 3/0 3/0 4/0 4/0 2 x 3/0
*100/185T
12 V 740 A
DIN: 750
SAE: 1425
EN: 1320
ANL 500
mm2 95 95 2 x 70 2 x 95 2 x 120
NA NA NA NA NA NA NA
AWG 3/0 3/0 2 x 2/0 2 x 3/0 2 x 4/0
24 V 340 A
DIN: 400
SAE: 760
EN: 680
ANL 325
mm2 50 50 50 70 70 95 95 120 120 2 x 95 2 x 95 2 x 120
AWG 1/0 1/0 1/0 2/0 2/0 3/0 3/0 4/0 4/0 2 x 3/0 2 x 3/0 2 x 4/0
*120/215T 24V 420 A
DIN: 450
SAE: 855
EN: 760
ANL 325
mm2 70 70 70 70 70 95 95 120 120 2 x 70 2 x 70 2 x 95
AWG 2/0 2/0 2/0 2/0 2/0 3/0 3/0 4/0 4/0 2 x 2/0 2 x 2/0 2 x 3/0
*130/250T
12V 800 A
DIN: 750
SAE: 760
EN: 680
ANL 500
mm2 95 95 2 x 95 2 x 95 2 x 120 2 x 120
NA NA NA NA NA NA
AWG 3/0 3/0 2 x 2/0 2 x 3/0 2 x 4/0 2 x 4/0
24V 350 A
DIN: 400
SAE: 760
EN: 680
ANL 325
mm2 50 50 50 70 70 95 95 120 120 2 x 70 2 x 95 2 x 95
AWG 2 1/0 1/0 2/0 2/0 3/0 3/0 4/0 4/0 2 x 2/0 2 x 3/0 2 x 3/0
*150/215T 24V 610 A
DIN: 560
SAE: 1064
EN: 940
ANL 500
mm2 70 70 95 95 120 120 2 x 70 2 x 95 2 x 95 2 x 120 2 x 120 2 x 120
2 2/0 2/0 3/0 3/0 4/0 4/0 2 x 2/0 2 x 3/0 2 x 3/0 2 x 4/0 2 x 4/0 2 x 4/0
*170/250 24V 550 A
DIN: 560
SAE: 1064
EN: 940
ANL 400
mm2 70 70 70 95 95 120 120 2 x 95 2 x 95 2 x 95 2 x 120 2 x 120
AWG 2/0 2/0 2/0 3/0 3/0 4/0 4/0 2 x 3/0 2 x 3/0 2 x 3/0 2 x 4/0 2 x 4/0
*210/250 24V 500 A
DIN: 560
SAE: 1330
EN: 940
ANL 400-
500
mm2 70 70 70 95 95 120 120 2 x 70 2 x 70 2 x 95 2 x 95 2 x 120
AWG 2/0 2/0 2/0 3/0 3/0 4/0 4/0 2 x 2/0 2 x 2/0 2 x 3/0 2 x 3/0 2 x 4/0
*250/300 24V 610-670 A
DIN: 700
SAE: 1330
EN: 1170
ANL 500
mm2 70 70 95 120 120 2 x 95 2 x 95 2 x 95 2 x 95 2 x 120 2 x 120 2 x 120
AWG 2/0 2/0 3/0 4/0 4/0 2 x 3/0 2 x 3/0 2 x 3/0 2 x 3/0 2 x 4/0 2 x 4/0 2 x 4/0
*300/300
24*2 400-450A
(48V)
DIN: 400
SAE: 760
EN: 680
ANL 325
mm2 50 70 50 70 70 95 95 120 120 120 140
NA
48V AWG 1/0 2/0 1/0 2/0 2/0 3/0 3/0 4/0 4/0 4/0 4/0
Multi-lug configuration
causes overheating and fire. Spring
washers must be placed in the outer
position before tightening the nut.
- All power cable lengths represent the total length of the combined (+) and (-) cables.
- Battery capacity is stated as minimum cold crank capacity, (CCA).
- Consider the AMP hours (Ah) for your specifi c duty cycle.
- See electrical specifi cations for advised minimum cables and batteries (CCA).
- Ensure the main switch (battery isolator) can be turned off independently and manually when not on board or in emergencies.
(NB: For Ignition Protected installations remember to use ignition protected fuses and switches if fi tted in areas that require this feature.
Ensure to follow your national regulations)
5. Cable lugs must have adequate electrical and mechanical isolation and fi tted with cable lug covers.

20 5 611 13 2 0 21
-
SE20 & SE25 & SE30 & SE40
Control Panel Cable Installation
EN
• All Sleipner control panels can be used in any combination.
• All control panels can be installed using:
• Y-connectors - for standard on/off
• T-connectors - for S-link proportional power system.
(NB: If two or more control panels are operated at the same time in opposite directions, the electronic control box will stop the thruster until
it receives a single signal or thrust in one direction.)
• Sleipner on/off equipment it is entirely “plug & play” and require no additional confi guration setup.
See the Control panel manual for more information.
MC_0041
!Please refer to the graphic for special considerations relating to your model !
MG_0024
Thruster
Motor
Ext. cable
4- or 5-lead
Y cable
4- or 5-lead
Ext. cable
4- or 5-lead
Option: Automatic main switch. Connects the battery to
the thruster. Operated from the control panel(s).
Requires 5-lead control cables.