Sleipner SH1000 User manual

SLEIPNER AS
P.O. Box 519
N-1612 Fredrikstad
Norway
www.sleipnergroup.com
DOCUMENT ID:
REVISION:
DATE:
LANGUAGE:
Installation Guide
For Hydraulic Thruster Models
SH1000, SH1400
EN
I M
5939
9
2 0 21

25939 92 0 21
-
SH 1000 & 1400
Sleipner Motor AS
P.O. Box 519, Arne Svendsensgt. 6-8
N-1612 Fredrikstad, Norway
MC_0020
Contents
Products
SM905333 | SH1400/610-BA110 - SH1400 Tunnel thruster, BA110
SM908033 | SH1400/610-BA150 - SH1400 Tunnel thruster, BA150
SM905334 | SH1400/610-BA180 - SH1400 Tunnel thruster, BA180
[Archived] SH1400/610-BA080 - SH1400 Tunnel thruster, BA80
SM908032 | SH1400/610-BA125 - SH1400 Tunnel thruster, BA125
SM102941 | SH1400/610-BA160 - SH1400 Tunnel thruster, BA160
SM908034 | SH1400/610-BA80 - SH1400 Tunnel thruster, BA80
SM102972 | SH1000/513-BA110D13 - SH1000 Tunnel thruster, BA110
SM103522 | SH1000/513-BA90 - SH1000 Tunnel thruster, BA90
SM114788 | SH1000/513-BA80 - SH1000 Tunnel thruster, BA80
SM908030 | SH1000/513-BA75 - SH1000 Tunnel thruster, BA75
SM905330 | SH1000/513-BA60 - SH1000 Tunnel thruster, BA60
SM908031 | SH1000/513-G70 - SH1000 Tunnel thruster, G70
SM908029 | SH1000/513-BA45 - SH1000 Tunnel thruster, Ø513mm
SM102899 | SH1000/513-BA125 - SH1000 Tunnel thruster, BA125
SM905331 | SH1000/513-G75 - SH1000 Tunnel thruster, G75
[Archived] SH1000/513-BA110 - * BRUK SH1000/513-BA110D13
SM905332 | SH1000/513-G80 - SH1000 Tunnel thruster, G80
MC_0425
General Installation Considerations and Precautions for Thrusters
• 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.
• 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.
• Never run the thruster out of water.
• The electro/ hydrulic motor must be handled with care. Do not place down the motor on the drive shaft.
MC_0105
Considerations and Precautions for S-Link Systems
When installing an S-Link™ system DO NOT connect any other control equipment directly to the S-Link™ bus except original Sleipner S-Link™ products.
In case of connecting third-party equipment, it must always be connected through a Sleipner-supplied interface product.
Any attempt to directly control or connect into the S-Link™ control system without a designated and approved interface will render all warranties and
responsibilities of all of the connected Sleipner products.
If you are interfacing the S-Link™ bus by agreement with Sleipner through a designated Sleipner supplied interface, you are still required to install at
least one original Sleipner control panel to enable efficient troubleshooting if necessary.
Installation Manual
Responsibility of the Installer................................................................................................................................................................... 3
Thruster Measurements ....................................................................................................................................................................... 4
Thruster Specications........................................................................................................................................................................... 5
Technical Specications .................................................................................................................................................................. 5 - 6
Technical Requirements / Hydraulic Hose Connections To Motor 7
Positioning of the tunnel / thruster.......................................................................................................................................................... 8
Tunnel Length......................................................................................................................................................................................... 9
Tunnel installation in sail boats............................................................................................................................................................. 10
Water Deection ................................................................................................................................................................................... 11
Tunnel ends.......................................................................................................................................................................................... 12
Tunnel installation........................................................................................................................................................................... 13- 14
Stern tunnel installation ........................................................................................................................................................................ 15
Gear Leg & Motor Bracket Installation.................................................................................................................................................. 16
Propeller Installation............................................................................................................................................................................. 17
Motor Installation ................................................................................................................................................................................... 18
Oil Tank Installation ............................................................................................................................................................................... 19
Crossover Valve .................................................................................................................................................................................... 20
S-Link System Description .................................................................................................................................................................... 21
Control Panel Installation ..................................................................................................................................................................... 22
Pre-delivery Checklist .......................................................................................................................................................................... 23
Service and Support........................................................................................................................................................................... 24
Product Spare Parts and Additional Resources.............................................................................................................................. 24
Warranty Statement............................................................................................................................................................................ 24

3
5939 92 0 21
-
SH 1000 & 1400
MC_0009
General Installation Considerations and Precautions for Hydraulic Thrusters
If an original Side-Power hydraulic system is NOT installed, please ensure the following:
• Install an oil fi lter to keep the oil clean.
• Fit an oil cooler or use an oil tank to ensure the maximum oil temperature is 43 - 50 degrees Celsius.
• Hydraulic thrusters are supplied with hydraulic motors only.
• The installed hydraulic system is the responsibility of the fi tter/ installer and must be within the limitations outlined in this manual to ensure no
damage is caused to the thruster.
• The hydraulic valve must have flow and pressure limits that are either set within or can be adjusted to the limits of the thrusters capability.
• We strongly advise that a shock valve is fi tted and set to 10% - 15% above the chosen maximum pressure set in the valve. This will prevent the
system from being damaged if the propellers are blocked for any reason.
• It is required that a device is installed to ensure that the drive direction cannot be suddenly changed, as this can severely damage the gear house.
(NB: By adding an electronic time-lapse/delay safety on the electric control system or by using a valve that has this type of protection built
in will prevent this issue. *The required time delay is 1 second.)
The installer must read this document to ensure necessary familiarity with the product before installation.
Instructions in this document cannot be guaranteed to comply with all international and national regulations. It is the responsibility of the
installer to follow all applicable international and national regulations when installing Sleipner products.
The recommendations given in this document are guidelines ONLY, and Sleipner strongly recommends that advice is obtained from a person
familiar with the particular vessel and applicable regulations.
This document contains general installation instructions intended to support experienced installers. If you are not skilled in this type of work,
please contact professional installers for assistance.
If required by local regulation, electrical work must be done by a licensed professional.
Appropriate health and safety procedures must be followed during installation.
Faulty installation of Sleipner products will render all warranties given by Sleipner Motor AS.
MC_0038
Responsibility of the Installer
MC_0425
General Installation Considerations and Precautions for Thrusters
• 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.
• 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.
• Never run the thruster out of water.
• The electro/ hydrulic motor must be handled with care. Do not place down the motor on the drive shaft.
Failure to follow the considerations and precautions can cause serious injury,
damage and will render all warranties given by Sleipner Motor as VOID.
MC_0411
MC_0105
Considerations and Precautions for S-Link Systems
When installing an S-Link™ system DO NOT connect any other control equipment directly to the S-Link™ bus except original Sleipner S-Link™ products.
In case of connecting third-party equipment, it must always be connected through a Sleipner-supplied interface product.
Any attempt to directly control or connect into the S-Link™ control system without a designated and approved interface will render all warranties and
responsibilities of all of the connected Sleipner products.
If you are interfacing the S-Link™ bus by agreement with Sleipner through a designated Sleipner supplied interface, you are still required to install at
least one original Sleipner control panel to enable efficient troubleshooting if necessary.

45939 92 0 21
-
SH 1000 & 1400
MG_0078
TL
WD
ID
T
Tunnel centre line
Twin Propeller
The gear leg/ propeller(s) must
never extend out of the tunnel
H
W
L
Propeller position will
vary with each thruster
model
MC_0189
Thruster Measurements
Measurement
code Measurement description mm inch mm inch
ID Internal tunnel diameter 513 7,28 610 24,02
H Motor Height 486 19,13 500 19,69
W Width 398 15,67 398 15,67
L Length 398 15,67 398 15,67
WD Water Depth 750 29,53 900 35,43
TL Minimum tunnel length 750 29,53 750 29,53
TL (recommended) Recommended tunnel length 1000 39,37 1000 39,37
T (min) Minimum tunnel wall thickness 16 0,24 18 0,71
T (max) Maximum tunnel wall thickness
*1000 *1400

5
5939 92 0 21
-
SH 1000 & 1400
MC_0110
Technical Specifi cations
Motor: Hydraulic type (specifi cations above).
Gear house: Seawater resistant bronze. Ball-bearing at propeller shaft and a combination of ball bearing and slide bearing at drive shaft.
Gears: Hardened precision gears.
Lubrication: Oil bath from tank (gear oil GL-5).
Bearings: Angular contact ball bearing at propeller shaft and combination of ball bearing and needle bearing at drive shaft.
Motor bracket: Seawater resistant aluminium, galvanization insulation from the motor.
Tunnel: Cross spun with rowing G.R.P tunnel
Steel & aluminium tunnels available at request.
Propeller: Symmetrical bronze 5-blade skew “Q-prop” propeller.
Safety: Flexible coupling between hydraulic-motor and drive shaft protects gear system if propeller jams.
MC_0148
Thruster Specifi cations
Description * 1000 * 1400
Light duty thrust up to (kg * lbs)
Heavy duty thrust up to (kg * lbs) 1000kg * 2205lbs 1400kg * 3085lbs
Typical Boat Size (m * ft) 30m - 45m * 100ft - 150ft 40m - 55m * 130ft - 175ft
Propulsion System Twin Counter Rotating Twin Counter Rotating
Power (kw * Hp) 59.8kw * 80.2hp 80.1kw * 107.4hp
Weight (kg * lbs) 168 - 182 kg * 370 - 401 lbs 211 kg * 465.17 lbs
Lubrication Gravity Feed/ On water change Gravity Feed/ On water change
MG_0078
TL
WD
ID
T
Tunnel centre line
Twin Propeller
The gear leg/ propeller(s) must
never extend out of the tunnel
H
WL
Propeller position will
vary with each thruster
model
MC_0189
Thruster Measurements
Measurement
code Measurement description mm inch mm inch
ID Internal tunnel diameter 513 7,28 610 24,02
H Motor Height 486 19,13 500 19,69
W Width 398 15,67 398 15,67
L Length 398 15,67 398 15,67
WD Water Depth 750 29,53 900 35,43
TL Minimum tunnel length 750 29,53 750 29,53
TL (recommended) Recommended tunnel length 1000 39,37 1000 39,37
T (min) Minimum tunnel wall thickness 16 0,24 18 0,71
T (max) Maximum tunnel wall thickness
*1000 *1400

65939 92 0 21
-
SH 1000 & 1400
MC_0112
Technical Specifi cations
60 % 70 % 80 % 90 % 100 %
Flow Pressure Flow Pressure Flow Pressure Flow Pressure Flow Pressure
SH1000
G70 L/min -Bar 91,0 220 99,0 256
USG-PSI 24.0 3190 26.2 3712
G75 L/min -Bar 98,0 205 106,0 239
USG-PSI 25.9 2973 28.0 3466
BA80 L/min -Bar 90,4 188 98,0 220 104,4 251 111,0 282
USG-PSI 23.9 2726 25.9 3190 27.6 3640 29.3 4089
BA90 L/min -Bar 99,5 167 107,0 195 115,0 225 122,0 251 128,5 279
USG-PSI 26.3 2422 28.3 2828 30.4 3263 32.2 3640 40.0 4046
BA110 L/min -Bar 122,0 139 131,4 132 140,5 185 149,0 208 157,0 231
USG-PSI 32.2 2016 34.7 1914 37,1 2683 39.4 3016 41.5 3350
SH1400
BA125 L/min -Bar 113,0 197 122,4 230 131,0 263 139,0 296
USG-PSI 29.9 2857 32.3 3335 34.6 3814 36.7 4292
BA150 L/min -Bar 139,0 164 150,0 192 160,4 219 170,0 247 179,4 274
USG-PSI 36.7 2378 39.6 2784 42.4 3176 44.9 3582 47.4 3973
BA160 L/min -Bar 145,0 154 157,0 180 167,5 205 178,0 231 187,0 257
USG-PSI 38.3 2233 41.5 2610 44.3 2973 47.0 3350 49.4 3727
BA180 L/min -Bar 163,0 137 176,0 160 188,5 183 200,0 205 211,0 228
USG-PSI 43.0 1987 46.5 2320 49.8 2654 52.8 2973 55.7 3306
SH 700
BA40 L/min -Bar 57,0 224 61,5 261 66 298
USG-PSI 15,01 3249 16,3 3785 17,4 4322
BA45 L/min -Bar 64.0 196 69.0 229 73,5 261,0 78,0 294,0
USG-PSI 17,7 2843 18,2 3321 19,4 3785,0 20,6 4264,0
BA56 L/min -Bar 79,0 160 85.0 186 91 213,0 97,0 240,0 102,0 266,0
USG-PSI 20,9 2321 22,5 2698 24 3089,0 25,6 3481,0 27,0 3858,0
BA60 L/min -Bar 85.5 149 92.5 174 99 199,0 105,0 224,0 110,5 248,0
USG-PSI 22,6 2161 24,4 2524 26,2 2886,0 27,7 3249,0 29,2 3597,0
1
1
2
2
3
3
4
4
5
5
6
6
A A
B B
C C
D D
72101/U-16
07.03.2014
1
Designed by Date
1 / 1
Edition Sheet
gille
Material Type Drawing nr
SM-106027
Copyright All rights reserved
Part nr Size Scale
Title
Hyd. motor 16 ccm
Tolerance
NS-ISO 2768-1
SLEIPNER MOTOR AS
A3
5,794 kg
1 : 2
Weight
44,8
 15,00
71,40
89,50
94,00
114,00

8,50(4x)
35,70
1
1
2
2
3
3
4
4
5
5
6
6
A A
B B
C C
D D
72101/U-16
07.03.2014
1
Designed by Date
1 / 1
Edition Sheet
gille
Material Type Drawing nr
SM-106027
Copyright All rights reserved
Part nr Size Scale
Title
Hyd. motor 16 ccm
Tolerance
NS-ISO 2768-1
SLEIPNER MOTOR AS
A3
5,794 kg
1 : 2
Weight
44,8
 15,00
71,40
89,50
94,00
114,00

8,50(4x)
35,70
1
1
2
2
3
3
4
4
5
5
6
6
A A
B B
C C
D D
72101/U-16
07.03.2014
1
Designed by Date
1 / 1
Edition Sheet
gille
Material Type Drawing nr
SM-106027
Copyright All rights reserved
Part nr Size Scale
Title
Hyd. motor 16 ccm
Tolerance
NS-ISO 2768-1
SLEIPNER MOTOR AS
A3
5,794 kg
1 : 2
Weight
44,8
 15,00
71,40
89,50
94,00
114,00

8,50(4x)
35,70
MC_0111
Technical Requirements / Hydraulic hose connections to motor
Port A Port B Drain port
(Must be installed,
Port location varies)
U, P & G-motor:
BA-motor:
Motor type Port A/B Port fl ange threads Drain port
G70 1 1/4" BSP - 1/4" BSP
G75 1 1/4" BSP - 1/4" BSP
BA40 3/4" 6000 PSI SAE J518/ISO6162 Code 62 3/8" UNC-2B 20 deep 3/4" - 16 UNF
BA45 3/4" 6000 PSI SAE J518/ISO6162 Code 62 3/8" UNC-2B 21 deep 3/4" - 16 UNF
BA56 3/4" 6000 PSI SAE J518/ISO6162 Code 62 3/8" UNC-2B 21 deep 3/4" - 16 UNF
BA60 3/4" 6000 PSI SAE J518/ISO6162 Code 62 3/8" UNC-2B 22 deep 7/8" - 16 UNF
BA80 1" 6000 PSI SAE J518/ ISO 6162 Code 62 7/16-14 UNC-2B 19 deep 7/8"-14 UNF
BA90 1" 6000 PSI SAE J518/ ISO 6162 Code 62 7/16-14 UNC-2B 19 deep 7/8"-14 UNF
BA110 1 1/4" 6000 PSI SAE J518/ ISO 6162 Code 62 1/2-13 UNC-2B 19 deep 1 1/16-12 UNF
BA125 1 1/4" 6000 PSI SAE J518/ ISO 6162 Code 62 1/2-13 UNC-2B 19 deep 7/8"-14 UNF
BA160 1 1/4" 6000 PSI SAE J518/ ISO 6162 Code 62 1/2-13 UNC-2B 19 deep 7/8"-14 UNF
BA180 1 1/4" 6000 PSI SAE J518/ ISO 6162 Code 62 1/2-13 UNC-2B 19 deep 7/8"-14 UNF
Always use upper positioned
drain port for optimal lubrication
of the motor.
Pre  ll motor housing with
hydraulic oil before start-up

7
5939 92 0 21
-
SH 1000 & 1400
1
1
2
2
3
3
4
4
5
5
6
6
A A
B B
C C
D D
72101/U-16
07.03.2014
1
Designed by Date
1 / 1
Edition Sheet
gille
Material Type Drawing nr
SM-106027
Copyright All rights reserved
Part nr Size Scale
Title
Hyd. motor 16 ccm
Tolerance
NS-ISO 2768-1
SLEIPNER MOTOR AS
A3
5,794 kg
1 : 2
Weight
44,8
 15,00
71,40
89,50
94,00
114,00

8,50(4x)
35,70
1
1
2
2
3
3
4
4
5
5
6
6
A A
B B
C C
D D
72101/U-16
07.03.2014
1
Designed by Date
1 / 1
Edition Sheet
gille
Material Type Drawing nr
SM-106027
Copyright All rights reserved
Part nr Size Scale
Title
Hyd. motor 16 ccm
Tolerance
NS-ISO 2768-1
SLEIPNER MOTOR AS
A3
5,794 kg
1 : 2
Weight
44,8
 15,00
71,40
89,50
94,00
114,00

8,50(4x)
35,70
1
1
2
2
3
3
4
4
5
5
6
6
A A
B B
C C
D D
72101/U-16
07.03.2014
1
Designed by Date
1 / 1
Edition Sheet
gille
Material Type Drawing nr
SM-106027
Copyright All rights reserved
Part nr Size Scale
Title
Hyd. motor 16 ccm
Tolerance
NS-ISO 2768-1
SLEIPNER MOTOR AS
A3
5,794 kg
1 : 2
Weight
44,8
 15,00
71,40
89,50
94,00
114,00

8,50(4x)
35,70
MC_0111
Technical Requirements / Hydraulic hose connections to motor
Port A Port B Drain port
(Must be installed,
Port location varies)
U, P & G-motor:
BA-motor:
Motor type Port A/B Port fl ange threads Drain port
G70 1 1/4" BSP - 1/4" BSP
G75 1 1/4" BSP - 1/4" BSP
BA40 3/4" 6000 PSI SAE J518/ISO6162 Code 62 3/8" UNC-2B 20 deep 3/4" - 16 UNF
BA45 3/4" 6000 PSI SAE J518/ISO6162 Code 62 3/8" UNC-2B 21 deep 3/4" - 16 UNF
BA56 3/4" 6000 PSI SAE J518/ISO6162 Code 62 3/8" UNC-2B 21 deep 3/4" - 16 UNF
BA60 3/4" 6000 PSI SAE J518/ISO6162 Code 62 3/8" UNC-2B 22 deep 7/8" - 16 UNF
BA80 1" 6000 PSI SAE J518/ ISO 6162 Code 62 7/16-14 UNC-2B 19 deep 7/8"-14 UNF
BA90 1" 6000 PSI SAE J518/ ISO 6162 Code 62 7/16-14 UNC-2B 19 deep 7/8"-14 UNF
BA110 1 1/4" 6000 PSI SAE J518/ ISO 6162 Code 62 1/2-13 UNC-2B 19 deep 1 1/16-12 UNF
BA125 1 1/4" 6000 PSI SAE J518/ ISO 6162 Code 62 1/2-13 UNC-2B 19 deep 7/8"-14 UNF
BA160 1 1/4" 6000 PSI SAE J518/ ISO 6162 Code 62 1/2-13 UNC-2B 19 deep 7/8"-14 UNF
BA180 1 1/4" 6000 PSI SAE J518/ ISO 6162 Code 62 1/2-13 UNC-2B 19 deep 7/8"-14 UNF
Always use upper positioned
drain port for optimal lubrication
of the motor.
Pre  ll motor housing with
hydraulic oil before start-up

85939 92 0 21
-
SH 1000 & 1400
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 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.)

9
5939 92 0 21
-
SH 1000 & 1400
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
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)
MC_0003
Tunnel Length
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 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.)

10 5939 92 0 21
-
SH 1000 & 1400
MG_0004
Min
Pos. B
Pos. A

1
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 installation in Sailboats
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.
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