9
5630
22
2021
-
SX35 & SX50
MC_0072
Positioning the stern thruster
For best performance, the thruster must be installed as deep on the stern as possible and the thrusters water flow must not obstruct any objects.
The thruster should be installed as deep under the waterline as possible for two reasons:
1. So it does not suck air from the surface which will reduce performance and increase noise levels.
2. To receive maximum effi ciency and thrust.
The thruster must be installed to ensure the propulsion water flow must not be obstructed by other objects. Objects that obstruct the water flow will
greatly reduce the thrust output.
Position
The thruster can be installed in multiple locations on the boat transom. Installing the thruster slightly off centre will not affect the overall effectiveness
of the thruster. Installing the thruster off centre may be required to avoid any obstructions externally or internally on the vessel.
Ensure that the external stern thruster assembly does not disturb the water flow under the hull. At higher speeds, if the thruster is installed to low can
cause damage to the thruster, additional drag and unwanted water splashing.
Alignment
The thruster can be installed at a slight angle if required for the water flow to avoid obstructions. These obstructions can include propellers systems,
trim tabs or the hull. The average force the thruster propels water is 5-7 meters per sec, therefore angled installations must be as deep as possible
under the water to minimise spray breaking beyond the water surface.
(NB: install the thruster at an angle only if no other suitable location can be
found.)
Max hull thickness 50mm include spacer
MG_0109
Thruster tunnel is
clear from obstruction.
Ensure the attachment bolts and
wiring are not obstructing objects
internally in the boat such as
steering legs or motors
Steering Arm
Installing the thruster at an angle
close to the water line will blast
water beyond the water surface.
This guide applies to
SX 35, 50, 80 & 100
Engine
The thruster can be installed in multiple
locations based on object obstructions
on the stern.
Engine
Water line
Water line
Water line
Engine
Engine
Thruster assembly does not disturb
the water flow under the hull.
Water flow
MC_0072
Stern Thruster Cowls/ Grids
Installing a stern thruster cowl for stern thrusters that will allow installations in boats with shallow drafts or due to other obstructions on the stern.
These can include obstacles such as trim tabs, jets or surface drive propeller systems where shallow installation of a stern thruster is the only option.
Cowls:
Designed to aid in water redirection and reduce air entering the tunnel in shallow installations.
Grid’s:
Designed to protect the thruster from objects while in use.
MG_0017
Shallow installation
Cowl water flow redirection
An angled edge further
preventing air attraction into
the tunnel
Composite material with smooth
inner walls for optimal water flow
and strength
A standard Sidepower stern
thruster tunnel with add-on cowls
for shallow installation
cowls to change the
water flow direction to
avoid obstructions on
the stern
cowls help prevent air
from the water surface
entering the tunnel in
shallow installations
Radius corners prevent
turbulence
Easy installation for easy
bolt-on fitting
A
B
C
D
IMPORTANT
Angled cowls out of horizontal, must be
installed deeper to avoid air entry in the
thruster tunnel
Model #
90126
90080
90077
90136
90130
90220
90560
A (mm/ in)
528/ 20.8
681/ 26.6
823/ 32.4
850/ 33.5
1010/ 39.75
1208/ 47.6
1580/ 62.2
B (mm/ in)
166/ 6.5
172/ 6.8
243/ 9.6
260/ 10.2
330/ 13
393/ 15.5
515/ 20.3
C (mm/ in)
130/ 5.1
240/ 9.4
D (mm/ i n)
170/ 6.7
256/ 10.1
256/ 10.1
288/ 11.3
340/ 13.4
419/ 16.5
540/ 21.3
IMPORTANT
Install the cowls/ grids before mounting the tunnel to the SX thruster.
100mm
177mm
537mm
174mm
