Lewmar 140TT - Installation - Fitting and Hub Units; Preparing for Fitting; 140 TT & 185 TT Hub Unit Installation

8
Electric/Hydraulic Stern Thruster
Models 185TT, 250TT & 300TT
GB
9
Electric/Hydraulic Stern Thruster
Models 185TT, 250TT & 300TT
GB
1.3 Preparing for fitting
The boat must be out of the water, levelled and
secure in its cradle.
A competent, marine engineer must carry out any
work on the hull of your boat.
Problems caused by faulty installation of the
tunnel are the installers full responsibility.
NOTE: Lewmar stern tubes are constructed
of polyester resin and glass fibre with a white
gell coat. Mounting template is provided with
the kit.
• Align template horizontally on transom.
OR
Offer up stern tube and level, mark holes for
drilling.
• Drill and cut all holes.
Fig. 1.31
• Seal all cut surfaces. (GRP Only).
Fig. 1.32
Stern tubes may be bonded in place. We
recommend that a qualified person carry out any
work to the hull. Faulty installation will place the
boat and crew in danger and make the warranty
invalid.
Fig. 1.33
1. Installation
Fig. 1.31
1.4 140TT & 185T T
Installing hub unit
• Place gasket on hub and locate through centre
hole.
• Apply zinc chromate paste or marine grease
to location bore and assemble saddle onto hub
(sicoflex or similar maybe used to seal saddle
in place). Apply blue loctite to bolts and hand
tighten along with supplied washers.
Fig. 1.32
• Assemble anode kit and propeller in this order:-
large washer, propeller, anode, small washer and
nyloc nut onto propeller shaft.
Tighten hub/saddle bolts to 7Nm (x.xlbs.ft)
140TT - 21Nm (15.5lbs.ft) 185TT. Check that
propeller is centred and free turning (within 10
minutes of applying Blue Loctite).
Fig. 1.33
• Tighten prop nut to 10Nm (7.4lbs.ft) 140TT
- 15Nm (11lbs.ft) 185TT , a length of wood
placed between prop blade and tunnel will stop
movement.
NOTE: Poor internal tunnel surface could cause
leakage. Apply sealant to this area and gasket
if in doubt.
Fig. 1.33
• Antifoul bronze hub.