LEWMAR 110-140TT TT Electric Thruster Owner’s Manual
Introduction
Dear Customer,Thank you for choosing Lewmar. Lewmar products are world renowned for their quality, technical innovation and proven performance. With a Lewmar product you will be provided with many years of outstanding service.
Product supportLewmar products are supported by a worldwide network of distributors and Authorised Service Representatives.If you encounter any difficulties with this product, please contact your national distributor, or your local Lewmar dealer.
CE ApprovalsFor CE approval certificates contact Lewmar.
Important information about this manualThroughout this manual, you will see safety and product damage warnings. You must follow these warnings carefully to avoid possible injury or damage.
Safety Notice
GeneralPlease ensure that you thoroughly understand the operation and safety requirements of the thruster before commencing the installation. Only persons who are completely familiar with the controls and those who have been fully made aware of the correct use of the thruster should be allowed to use it. If there is any doubt of how to install or operate this unit please seek advice from a suitably qualifi ed engineer.
- Please ensure that you thoroughly understand the operation and safety requirements of the thruster.
- Your thruster should not be operated close to swimmers, as a powerful suction of water is generated when in use.
- The tunnel installation and any hull modifications should only be carried out by a specialist. This manual is based on a GRP tunnel installation.
- We recommend that a qualified person install the thruster. Faulty installation will place the boat and crew in danger and make the warranty invalid.
- It is the unavoidable responsibility of the owner or master or other responsible party to assess the risk of any operation on the vessel.
Thruster supply
- The thruster is securely packed for transit. However all parts should be inspected for signs of damage before installation. If any parts are found to be damaged please contact lewmar.
Fitting
- This equipment must be installed and operated in accordance with the instructions contained in this manual. Failure to do so could result in poor product performance, personal injury and/or damage to your boat.
- Electric thrusters must be located in a dry environment.
- Electric bow thrusters use powerful electric motors, it is very important that there is sufficient battery capacity and large enough cables for safe operation. Using smaller than recommended battery and cables will cause loss of performance and may cause dangerous overheating.
- Electric motors spark and run hot. Do not place near flammable or sealed areas.
- Main battery must not be connected and power must not be switched on until all covers and terminal protectors are correctly fitted.
- It is very dangerous to run the thruster out of the water, even for a few seconds, the motor will over speed by 300%, causing damage to the motor seals etc. and the propeller will cause serious damage to whatever comes into contact with it. This action will invalidate the warranty.Consult the boat manufacturer if you have any doubt about the strength or suitability of the mounting location.
Electrical
- Make sure you have switched off the power before you start installing this product.
- If in doubt about installing electrical equipment please seek advice from a suitably qualified electrical engineer.
To the best of our knowledge, the information in this manual was correct when it went to press. However, Lewmar cannot accept liability for any inaccuracies or omissions it may contain.In addition, our policy of continuous product improvement may change specifications without notice. As a result, Lewmar cannot accept liability for any differences between the product and the manual.
This manual forms part of the product and MUST BE RETAINED along with, OR incorporated into, the Owner’s Manual for the vessel to which the thruster is fittted.
Installation
Choosing the location
⚠ A competent, marine engineer must carry out any work on the hull of your boat.
⚠ The boat MUST be out of the water, levelled and secure in its cradle.
The actual position of the Thruster will depend on the internal & external construction of the Motor Boat or Sailing Yacht. For optimal performance the Thruster should be mounted within the following:
- As far forward as possible (Fig 3.1.1 / lever effect).
- 1 x Ø below the waterline to prevent air being sucked into the tunnel. (Fig. 3.1.2 / 0.75 x Ø minimum.).
- Minimum suggested tunnel length 2 x Ø.
NOTE: Ensure there is sufficient space for the Thruster assembly complete with motor and controls in the boat.
Ø = Tunnel Diameter
TT Thruster can be fitted new or as a replacement for an existing thruster. Tunnel dimensions listed on the following table.NOTE: Check mounting holes on the saw template
| THRUSTER MODEL(kW) | mm | INSIDE DIAMETERinch | mm | WALL THICKNESSinch |
| 110 (1.5) | 110 | 4 5/16 | 5.0 | 3/16 |
| 140 (2.0) | 140 | 5’/ | 4.0-5.0 | 5/32 – 3/16 |
- The recommended tunnel is designed to fit a Lewmar saddle, take the weight of the Thruster and the torque of the motor.
- Fig 3.1.3 – To reduce any potential loss of performance or damage to the propeller the entrance of the tunnel can be altered to improve thrust as well as reduce noise.
Preparing the hole for the tube
For general guidance for GRP boats only. Problems caused by faulty installation of the tunnel are the installers full responsibility.
When you are satisfied the best location for the Thruster unit has been found within the parameters available proceed as follows.
- Fig 3.2.1 – Make a jig to precisly align the drill holes either side of the hull.NOTE: Double check everything before drilling
- Drill a pilot hole in both sides of the hull.
- Form a wire guide to diameter of the tunnel hole, mark, check and cut.
- Insert tube in the hole, mark and remove excess.
- Grind off gel coat etc. Insert tunnel and fix allowing enough room inside for saddle location on the tunnel.
- Gel coat finished installation and antifoul.
Preparing for fitting the thruster
The Thruster can be installed at any angle within 90° from vertical.Electric motors must be supported if installed more than 30° from vertical (Fig 3.3.1).
- Choose position of thruster, ensuring internal room for motor and controls and that the propeller is easily reached from outside.NOTE: Fig 3.3.2. – Normal install is to Port
- Place the thruster saddle in the desired position, ensure the fit is firm and free from movement then mark centre.
- To aid installation a kit is available. See Sec 6.6 Accessories.
- Position template on centre line, double check everything and drill. Remove all burrs. All the holes must be on the centre line. Poor alignment may affect hub positioning
Installing hub unit and saddle
NOTE: Illustrations based on 140TT saddle
- To suit the wiring configuration supplied fit the thruster propeller on the port side.
- Place gasket on hub and locate through centre hole. Sealant can be applied to gasket and flange to aid sealing.
NOTE: To achieve the correct position of the propeller in the tunnel the gasket must be inplace.
NOTE: Tighten to full torque within 10 minutes.
- Apply zinc chromate paste or marine grease to location bore and assemble saddle onto hub (SikaFlex® or similar maybe used to seal saddle in place). Apply Blue Loctite® 243 to bolts and hand tighten along with supplied washers (Fig. 3.4.2).
NOTE: Poor exterior tunnel surface could cause leakage and noise. Apply sealant to this area as required (Fig. 3.4.2).
Propeller assembly
- Check the hub gasket is in place.
- Fig 3.5.1 – Assemble propeller as shown: nyloc nut onto propeller shaft.Note: Tighten each bolt alternately a number of times to full torque.
⚠ Check the propeller has been assembled in the correct order.
Fig 3.5.2 – Tighten hub/saddle bolts to
- 5 Nm (3.7 lbs.ft) for 110
- 9 Nm (6.6 lbs.ft) for 140
DO NOT allow propeller to touch tunnel.
Check that propeller is centred and free turning (within 10 minutes of applying Blue Loctite® 243).
- Antifoul propeller if desired.
Tighten propeller nut to
- 6Nm (4.4 lbs.ft) for 110
- 10 Nm (7.4 lbs.ft) for 140A length of wood placed between propeller blade and tunnel will stop movement.
DO NOT overtighten propeller nuts.
Electric motor unit support
If the electric motor is installed more than 30° from the vertical it MUST be supported and secured to the support with a strap (not supplied) around the main motor unit.
Installing electric motor unit
Illustrations based on 140TT saddle.
- Align motor drive pin inline with slot in shaft. Apply grease to hub shaft.
DO NOT REMOVE the drive pin plastic retainer tie on the motor drive shaft.
- Slide motor into position and align holes for most suitable installation.
- Bolt motor assembly to saddle and tighten bolts to 20 Nm (15 lbs.ft) . Apply Blue Loctite® 243 to all bolts.
Final checks
Check list mechanical
- Check all bolts and nuts are tight.
- Check the propeller/s are correctly installed and the nuts tightened.
- Check the motor control box cover is in place.
- Check the propeller/s can be turned – before working on unit check battery switch is off or remove the fuse
- Saddle and motor are firmly seated on the tube
Electrical wiring installation
Typical electrical layout
If the thruster operates in an opposite direction to the control panel, swap the grey and blue wire connections on the contactor coils.NOTE: Automatic battery switch can not be used with this product.
⚠ To satisfy International standards, a suitably sized battery switch should be fitted to the thruster +VE supply. It should be switched off whilst the thruster is not in use or the boat is unoccupied.Lewmar recommend this as best practice for safe installations.
LOOM WIRING
Red: +VEBlue: Thrust port switchGrey: Thrust starboard switchBlack: -VE
Electric motor terminal connections
- Terminals must be correctly clamped to motor studs. Use a pair of spanners – the one nearest motor to stop rotation of the stud.
- Spanner size is 13 mm. Tighten the bolts to 20 Nm (15 lbs.ft).
DO NOT overtighten electric motor terminal nuts.
Battery cable connections
- The cables should be terminated with a ring terminal corresponding to the motor studs, 8 mm (5/16”).It is important that this termination is secure so that the high current is transferred to the motor efficiently.The minimum voltage at motor when running should be 10 V for 12 V units.
- Ensure the insulating boots, supplied with the unit, are correctly fitted.Incorrect installation of battery cables or damage to connection studs may result in a short to the thruster body. Use the examples opposite to check for a correct installation on both +V and -V battery connections.
- Correct installation. Supplied cable boots are used and no bare wires exposed (Fig 4.3.1).
- Live wire exposed! (Fig. 4.3.2). Correct the cable installation to match (Fig 4.3.1).
- Terminal or motor is damaged. Contact Lewmar Limited (Fig 4.3.3).
- Crimp inverted and is touching motor! (Fig 4.3.4). Correct the cable installation to match as (Fig 4.3.1).NOTE: If very large cables are used discard supplied boots and fit appropriate sized ones.
Recommended cable sizes
- Battery crank capacity should be at least 1.5 times the thruster current.
- Main power cables should be run from the batteries and must have an inline fuse fitted.
NOTE: Cable length is total from battery to thruster and back
| THRUSTER MODEL(kW) | mm | INSIDE DIAMETERinch | mm | WALL THICKNESSinch |
| 110 (1.5) | 110 | 4 5/16 | 5.0 | 3/16 |
| 140 (2.0) | 140 | 5’/ | 4.0-5.0 | 5/32 – 3/16 |
Electrolytic test
To prevent electrolytic corrosion or faults, the thruster motor body and assembly MUST remain isolated from any power supply or grounds. The installer can check for this using a multimeter in the following ways.Test 1. Fig.4.5.1With the negative not connected and the positive cable connected but with battery switch off or fuse removed. Use a continuity tester to check for a connection between the –VE stud and motor body and also between +VE stud and motor body. In both cases the meter should give no indication of an electrical connection.
If a connection is measured between the +VE stud and the motor body, check installation for cables or wires touching the assembly or for damage to assembly.If a connection is measured between the –VE stud and the motor body, remove any bonding straps attached to the assembly andcheck as before.
Test 2. Fig 4.5.2With the batter y applied: Use a voltmeter to test the voltage between the –VE motor stud and the thruster motor body. If the supply voltage (12 V/24 V) is measured, disconnect power immediatelyand inspect the assembly for faulty installation or damage.Installing control panel
Final checks
Check the power is OFF
Check list electrical
- Check motor connections are tight with rubber boots in place.
- The correct fuse is in place.
- Check all switch wires are connected to correct motor terminal.
- Now the cables can be connected to the battery.
The thruster must not be operated unless it is in water.
Operation of electrical unit
- Ensure batteries are fully charged before switching on the main power.
- Before operating the thruster, check that the water is free from swimmers, divers or debris and make sure you are not close to other vessels.
Operating your thruster
The thruster can be operated using the Lewmar simplejoystick (Part No. 589094) or any water proof momentary two direction switch with a 5 amp rating.
- Switch ON the battery switch.
- To turn on the panel, press and release the ON/OFF button (fig.5.1). This will cause the LED to illuminate indicating the panel is ONMove the joystick in the desired direction to operate the Thruster (fig.5.2)
- To turn off the panel, press and release the ON/OFF button. This will cause the LED to turn off indicating the panel is off.
⚠ DO NOT frequently move port to starboard on the joystick in quick succession as this could damage the electric motor.
⚠ Please ensure that you thoroughly understand the operation and safety requirements of the thruster.
⚠ Your thruster should not be operated close to swimmers, as a powerful suction of water is generated when in use.
Servicing your thruster
Service schedule
Thrusters are more likely to attract ‘debris’, so it is necessary to regularly check the tunnel.At the annual boat service:
- Remove any debris from tunnel, propeller and hub.
- If the propeller is damaged or heavily contaminated, replace it, best to be safe.
- Apply grease to exposed thruster seal and shaft.
- If hub is removed the tunnel gasket must be replaced.
- Inspect motor, ensure all leads are still tight.
- Check all bolts and nuts are to correct torque.
- Check the motor assembly is dry and that the compartment is water tight.
- Check and clean out thruster compartment.
Electric
- Inspect electric motor, ensure all leads are still tight.
- Brush out carbon dust from top of electric motor especially on aluminium boats. Recommend qualified electrician.
Changing drive pin
- Cut cable tie on shaft (if fitted)
- Punch out pin parts
- Tap in new pin and secure with new plastic cable tie
Specifications
| PART NO | MODEL | VOLTAGE | POWER | GEARBOX | TUNNEL | THRUST | WEIGHT | FUSE | |||
| V | kW | hp | MATERIAL | (mm) | kgf | I lbs | Kg | lbs | |||
| 591101 | 110TT1.5 | 12 | 2. | 2.0 | Composite | 110 | 28 | 62 | 10 | 22 | 200A- 589012 |
| 591482 | 140TT2.0 | 12 | 2.0 | 3. | Composite | 140 | 37 | 81 | 13 | 29 | 200A- 589012 |
- Propeller: Single 5 blade
- Suitable fuse holder:Standard – 589006 or T2- 589013
Parts list
| ITEM | PART NO110TT | PART NO140TT2.0 | DESCRIPTION |
| 1 | 582003 | 581029 | Motor Assembly |
| 2 | 553034 | 553034 | Cover |
| 3 | B12526 | B12526 | Solenoid |
| 559070 | 559070 | Solenoid loom | |
| 4 | 552004 | 551052 | Mounting Saddle |
| 5 | 552005 | 551035 | Tunnel gasket |
| 6 | 582001 | 581001 | Hub assembly |
| 7 | 589451 | 589151 | Propeller and washer |
| 8 | 589453 | 589150 | Propeller fixing kit |
| 9 | 589452 | 589152 | Installation fixing kit |
| 10 | 559107 | 559018 | Drive pin |
Accessories
|
ITEM |
PART NO | DESCRIPTION |
|
1 |
589094 | Joystick |
| 2 | 589021 |
2m Control cable & Connectors |
| 589016 | 7m Control cable & Connectors | |
| 589017 |
10m Control cable & Connectors |
|
| 589018 | 14m Control cable & Connectors | |
| 589019 |
18m Control cable & Connectors |
|
|
3 |
589206 | Y connector for dual controls |
| 4 | 589006 |
Fuse Holder |
|
5 |
589013 | T2 Fuse Holder |
| 6 | 589012 |
200A ANL Type Fuse |
| 7 | 589096 |
Motor Support Bracket kit |
Dimensions
Illustration based on the 140TT2.0 model
| MODEL | A | B | C | 0 | ||||
| 110TT | 123 | 4% | 261 | 10’% | 110 | 4 1/2 | 67 | 2% |
| 140112.0 | 123 | 4% | 235 | 9’/4 | 140 | 5’h | 73 | 2 1/2 |
Fault finding
|
Thrust in wrong direction? |
Change contactor wires on motor solenoid (See section 4.1). |
| Fuse keeps blowing? |
|
| Control panel does not illuminate? | Check
|
| Control panel illuminates but no thrust? |
|
| Poor thrust or thrust in one direction only? |
|
| Motor turns but no drive? | ⚠ DO NOT continue to run thruster.
|
| Thruster noisy and vibrating? |
|
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