Lewmar Thruster 110TT and 140TT 2.0 Manual ref B10417 iss.2
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9
‣ 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).
‣ 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.
‣ 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.
4.2 Electric motor terminal connections
4.3 Battery cable connections
4.4 Recommended cable sizes
DO NOT overtighten electric motor
terminal nuts.
TT Model
Current
(A)
Max cable length (meters)
Cable size (mm C.S.A)
110 1.5 kW-12V
215
12
50
140 2.0 kW-12 V
270
14
70
Fig 4.2
‣ 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 sup-
plied boots and fit appropriate sized ones.
⚠ Incorrect installation of battery cables or dam-
age 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.
Boot
Fig 4.3.1
Boot
Fig 4.3.2
Boot
Fig 4.3.3
Boot
Fig 4.3.4
