ePropulsion X Series User manual

2023.11 Version 1.1
Copyright © ePropulsion Technology Limited
X40 User Manual
Model: X40-L, X40-XL

1
THANK YOU
Thank you for purchasing a product from ePropulsion, world leaders in clean, safe and reliable
electric marine propulsion systems. We are sure you'll be pleased with your new motor and
welcome your feedback at www.epropulsion.com
Conditions of Use
Before using this product, please read this user manual thoroughly to understand how to use
the product correctly and safely. By using this product, you indicate that you have fully read
and understood, and agree to, all the contents of this manual. Do not use the electric outboard
motor until you have understood how it operates. Do not lend the outboard motor to anyone
who is not familiar with its operation. ePropulsion is not responsible for any economic loss
or personal injury resulting from operations that do not comply with the instructions in this
manual.
Please note that ePropulsion has a policy of continuous product optimisation, and reserves the
right to update the contents of this manual at any time. Please visit www.epropulsion.com to
obtain the latest version. If you find any discrepancies between your product and this manual or
have any questions about the product or this manual, please visit the website www.epropulsion.
com or contact us. ePropulsion reserves the right to make the final interpretation of this
manual.
This manual is available in multiple languages, and in the event of any discrepancies between
different language versions, the English version shall prevail.
ePropulsion also retains all relevant intellectual property and industrial rights, including
copyrights, patents, trademarks, and designs.
Safety Warning
ePropulsion attaches great importance to safety and reducing risk to individuals and property.
We advise any person who comes into close contact with our products to exercise caution,
use common sense, follow the instructions in this manual, and pay particular attention to the
safety information in the manual and on product labels. Such persons include those who install,
operate, maintain and service the product.
The following information symbols are found in the user manual and/or on labels attached to
the product:
Danger or Warning Signs:
These signs indicate potential hazards or significant risks that, if not avoided, could result in

2
death or serious personal injury. Extra caution and attention should be exercised regarding your
safety or the safety of the product.
Important warning:
Tips or important points of information that help quickly grasp the use of the outboard motor
and improve efficiency. Please read and follow the instructions following the safety warning
signs.
Caution:
When installing, operating, maintaining or servicing ePropulsion products, there are many safety
risks. You need to be alert, perform relevant operations reasonably, and pay attention to safety.
Entanglement hazard:
Rotating parts can cause severe injury or death. Never wear jewelry, unbuttoned cuffs, ties or
loose-fitting clothing and always tie long hair back when working near moving/rotating parts
such as the flywheel, PTO shaft and propeller. Keep hands, feet and tools away from all moving
parts.
Electric shock hazard:
These areas or components may pose a risk of electric shock. The equipment uses 102.4V DC
power. When accessing or opening electrical connectors, switches, cables and other electrici-
ty-related items, turn off the power to prevent electric shock.
Burn hazard:
Some parts of the outboard become very hot during operation and may remain hot when turned
off. Keep hands and other body parts away from these areas.
Do not approach when the outboard is running:
These parts of the outboard are potentially dangerous when operating - keep clear of these
areas when the outboard is running, or about to start.
Do not connect or disconnect when the outboard is running:
These parts of the outboard may pose a risk of electric shock if connected to or disconnected
from the power supply during operation.
Warning:
This product can expose you to chemicals including arsenic, which is known to the State of
California to cause cancer. For more information, go to www.P65Warnings.ca.gov.
90mm
86mm
60mm
56mm
13mm
110mm
76mm
22mm
100mm
88mm
110mm
76mm
22mm
100mm
88mm
120mm
116mm
80mm
76mm
18mm
120mm
116mm
80mm
76mm
18mm

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Product Serial Number
The serial number is located as shown below. Please note and keep in a safe place, as it may be
needed when purchasing accessories, or if you need service or warranty, or if your motor is sto-
len.

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Table of Contents
THANK YOU ........................................................................................................... 1
Conditions of Use .................................................................................................. 1
Safety Warning ....................................................................................................... 1
Product Serial Number ........................................................................................... 3
1 Product Introduction............................................................................................ 8
1.1 In the Package.........................................................................................................8
1.1.1 X40 Packaging List......................................................................................8
1.1.2 Optional Accessory List ........................................................................... 10
1.1.3 Installation Tools List ............................................................................... 14
1.2 Parts and Diagram ............................................................................................... 15
1.3 Specification......................................................................................................... 17
1.4 Model and Shaft Length Selection...................................................................... 18
1.5 Important Notes................................................................................................... 18
1.5.1 Motor Selection ........................................................................................ 18
1.5.2 Motor Installation ..................................................................................... 18
1.5.3 Users ......................................................................................................... 19
1.5.4 General Boating Advice............................................................................ 19
1.5.5 Specific to this Installation ...................................................................... 20
1.6 Declaration of Conformity ................................................................................... 21
1.7 Statement ............................................................................................................. 21
1.8 Correct Disposal of this product......................................................................... 22
2 Unpacking ......................................................................................................... 23
2.1 Safety Notice........................................................................................................ 23
2.2 Tools and Equipment Required for Unpacking................................................... 23
2.3 Check the Package .............................................................................................. 23
2.4 Unpacking............................................................................................................. 23
2.5 Disposal of packaging materials ........................................................................ 25
3 X-Series Outboard Motor Installation ................................................................. 26
3.1 Before Installation................................................................................................ 26
3.2 Outboard Motor Installation................................................................................ 27
3.3 Propeller Installation/Replacement.................................................................... 29
4 Connections ...................................................................................................... 31

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4.1 X40 Examples System Setup .............................................................................. 31
4.1.1 Single Motor System Connection............................................................. 31
4.1.2 Twin Motor System Connection............................................................... 32
4.2 High Voltage Cables Connection ........................................................................ 33
4.2.1 Making the Power Cables ........................................................................ 33
4.2.2 Connecting Cables to the bus box .......................................................... 34
4.2.2.1 Required accessories and tools.................................................. 34
4.2.2.2 Installation.................................................................................... 34
4.2.3 Connecting the DC-DC Module and 12V Battery .................................... 36
4.2.3.1 Required Accessories and Tools ................................................ 36
4.2.3.2 Installation Steps ......................................................................... 37
4.2.4 Connecting the G102-100 Battery Bank.................................................. 38
4.2.4.1 Required Accessories and Tools ................................................ 38
4.2.4.2 Installation Steps ......................................................................... 38
4.2.5 Connecting the outboard motor's Main Power and 12 volt Cables....... 39
4.2.5.1 Required Accessories and Tools ................................................ 39
4.2.5.2 Installation Steps ......................................................................... 39
4.3 Connection of Communication Devices (helm, throttle etc)............................. 41
4.3.1 Remote Control Scenario: Connecting Interactive Devices and Accessory
Communication Cables..................................................................................... 41
4.3.1.1 Required Accessories for Single Motor System Connection.... 41
4.3.1.2 Installation Steps ......................................................................... 41
4.3.1.2.1 Connecting Interactive Devices and Accessories .................. 41
4.3.1.2.2 Smart throttle connection ........................................................ 42
4.4 Grounding ............................................................................................................. 43
4.5 External 4G & GPS Antenna (if required)............................................................ 44
4.5.1 Installation of the 4G Antenna................................................................. 44
4.5.2 Installation of the External GPS Module ................................................. 45
4.6 Communication Terminator Connection ............................................................ 47
5 Operation........................................................................................................... 48
5.1 Smart Throttle Button Functions (single & double throttles) ............................ 48
5.2 Starting the System ............................................................................................. 50
5.2.1 Start........................................................................................................... 50
5.2.2 System problem feedback method after startup ................................... 51
5.3 Perform initial configuration ............................................................................... 51

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5.4 Home Page........................................................................................................... 54
5.5 Propulsion Page................................................................................................... 57
5.5.1 Control Console........................................................................................ 57
5.5.2 Traction Battery ........................................................................................ 58
5.5.3 Motor(s) .................................................................................................... 59
5.6 Setting................................................................................................................... 59
5.6.1 Outboard Setting ...................................................................................... 60
5.6.1.1 Propulsion switch ........................................................................ 60
5.6.1.2 Steering Settings.......................................................................... 61
5.6.2 Control console Settings.......................................................................... 61
5.6.2.1 Smart throttle settings ................................................................ 61
5.6.2.2 Display settings............................................................................ 63
5.6.2.3 Helm Settings............................................................................... 64
5.6.3 General settings........................................................................................ 65
5.6.3.1 System firmware information ..................................................... 65
5.6.3.2 Maintenance - All maintenance timing tips................................ 66
5.6.3.3 ePropulsion Connectivity Service ............................................... 67
5.7 Operation .............................................................................................................. 69
5.7.1 Checks before starting............................................................................. 69
5.7.2 Starting the Outboard Motor.................................................................... 69
5.7.3 Adjusting the Power ................................................................................. 69
5.7.4 Steering Control........................................................................................ 70
5.7.5 Trim Angle Adjustment ............................................................................ 70
5.8 Hydro Generation Function.................................................................................. 74
5.9 Idle mode, Sleep................................................................................................... 75
5.9.1 Idle mode .................................................................................................. 75
5.9.2 System Sleep ............................................................................................ 75
5.10 Cautions ............................................................................................................. 76
5.11 Troubleshooting................................................................................................. 77
5.11.1 Mechanical Faults/Solutions................................................................. 77
5.11.2 System Faults/Solutions........................................................................ 78
5.12 Control Failures & Limp Home Modes.............................................................. 81
5.12.1 Main Driver Limp Home mode............................................................... 81
5.12.2 Temporary Running Mode...................................................................... 82
5.12.3 Manual Trim............................................................................................ 83

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5.13 Other Interfaces ................................................................................................. 83
5.13.1 Connection to external sound or light alarm ........................................ 83
5.13.2 Connection to external NMEA 2000 devices........................................ 84
6 Emergency Situations........................................................................................ 85
6.1 Collision................................................................................................................ 85
6.2 Swamped or Submerged Outboard .................................................................... 85
6.3 Overtemperature Protection................................................................................ 85
7 Maintenance...................................................................................................... 86
7.1 Maintenance......................................................................................................... 86
7.1.1 Routine maintenance ............................................................................... 86
7.1.2 Outboard maintenance ............................................................................ 87
7.2 Partial Maintenance and Care Guidelines .......................................................... 88
7.2.1 Gearbox Oil Replacement Procedure ...................................................... 88
7.2.2 Anode Inspection & Replacement ........................................................... 90
7.2.3 Coolant Filler............................................................................................. 91
7.2.4 Propeller.................................................................................................... 92
7.2.5 Exterior Surface of the Outboard Motor.................................................. 92
7.2.6 Greasing Points ........................................................................................ 92
7.2.7 Check Grounding Wires............................................................................ 93
8 Limited Warranty ............................................................................................... 94
8.1 Warranty Exclusions ............................................................................................ 95
8.2 Limited Warranty Claim Procedures................................................................... 96

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1 Product Introduction
The X40 Electric Outboard Motor is an electric propulsion system with an input power of
40kW. It can be controlled by using the smart tiller, digital helm, smart throttle, and smart dis-
play 5''. The X40 Electric Outboard Motor is environmentally friendly, clean, and ecient. It is
available in two models: X40-L and X40-XL.
1.1 In the Package
When opening the packages please check contents against the list below. If anything is miss-
ing or damaged, please contact your dealer.
1.1.1 X40 Packaging List
Items Qty. Figure Function
X40 Outboard
motor w/o
propeller
1Provide the main
propulsion of the boat
Bus box 1
Transfers electrical
energy from the power
system's main circuit to
different components
or modules within the
circuit.
96V Power Cable
5m 2
Transfer DC power
from the battery to
the power input of the
motor.
eSSA
Communication
Cable 1m
1
Connect the motor and
other devices such
as the smart throttle,
smart display and
battery.
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Items Qty. Figure Function
eSSA
Communication
Extension Cable
10m
1
Extend the
communication
distance of the CAN
communication cable
Heat Shrink
Tubing 2Protect the main power cable after stripping it
Cable connector 6
Terminals to fit on cut
ends of 96V power
cable
eSSA
Communication
5-way T Connector
1
Connect the motor
and each device to the
CAN communication
network (controller
LAN)
eSSA
Communication
3-way T Connector
2
Connect the motor
and each device to the
CAN communication
network (controller
LAN)
eSSA
Communication
Terminator 120Ω
1Improve the quality of
communication
eSSA
Communication
Terminator 360Ω
1Improve the quality of
communication
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Items Qty. Figure Function
X-Series Outboard
Motor Installation
Accessory Pack
1
Hexagon Bolt M12x1.25x110*4
Hexagon Nut M12x1.25*8
Large Washer M12*4
Plain Washers M12*4
Eye Bolt M10*2
Plain Washers M10
Motor installation
User manual
Warranty card 1
Give information about
the features, functions,
performance, purpose
and maintenance of the
product.
1.1.2 Optional Accessory List
Other accessories not included in the package are also required to operate the outboard mo-
tor such as propellers, smart tiller, digital helm, smart throttle, smart display 5'', G102 battery,
battery charger, and communication cables. Users can buy ocial accessories provided by
ePropulsion Technology authorized dealers.
Items Figure Function
X20/X40 propeller
15'' x 10 3/4'' RH
Suitable for heavier boats at
lower (displacement) speeds.
Right hand rotation.
X20/X40 Propeller
15'' x 10 3/4'' LH
Suitable for heavier boats
at lower speeds, left hand
rotation. For use in twin or
multiple motor installations.
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Items Figure Function
X20/X40 Propeller
13 3/8'' x 16 3/4"
RH
Suitable for lighter boats at
higher (often planing) speeds.
Right hand rotation.
X20/X40 Propeller
13 3/8'' x 16 3/4"
LH
Suitable for lighter boats
at higher speeds, left hand
rotation. For use in twin or
multiple motor installations.
G102 Battery
and Cables
ePropulsion LiFePo4 system
battery, 10kWh capacity.
Provides safe and reliable
electrical power.
Digital Helm Outboard motor steering
control

12
Items Figure Function
Smart Throttle Start, stop the motor and
control the power output
Smart Display 5''
Display system information
such as power, speed, battery
level and set system functions
DC-DC
Converter
DC-DC Converter to charge
the 12V battery from the high
voltage batteries
GPS module
For use if signal from motor's
inbuilt GPS antenna is weak.
Provides information including
position and speed.

13
Items Figure Function
4G antenna
For use if signal from motor's
inbuilt 4G antenna is weak.
Enables high speed data
transmission for remote
control, monitoring and backup.
12V battery Provide power to the system's
12V equipment
G battery charger Charge the G102 battery
The 12V battery (not supplied with motor) needs a minimum current output of 120A, a
capacity of 120Ah.
The maximum output power of the DC-DC Converter is 500W. When selecting the sys-
tem's 12V equipment, ensure this charging capacity meets the battery's requirements.
When selecting and purchasing propellers, it is recommended to consult ePropulsion
authorized dealers and consider the following references:
• If the expected speed is 25km/h or less, it is recommended to choose the X20/X40 Pro-
peller 15'' x 10 3/4'' RH or X20/X40 Propeller 15'' x 10 3/4'' LH.
• If the expected speed is higher than 25km/h, it is recommended to choose the X20/X40
Propeller 13 3/8'' x 16 3/4" RH or X20/X40 Propeller 13 3/8'' x 16 3/4" H.
In the case of twin-motor or multi-motor setups, it is recommended to use a combina-
tion of RH and LH propellers to achieve better-balance between the motors and easier
steering.

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1.1.3 Installation Tools List
Before installing the outboard motor, the user or installation engineer needs to prepare the fol-
lowing tools.
Tool Specification Qty. Purpose
4mm Allen key
(hex key or hex
bit)
4mm, suitable for M5 hexagon
socket cap screws 1
To disassemble the outboard's
top cover, facilitating the
installation of eye bolts and
hoisting
3mm Allen key 3mm, suitable for M4 hexagon
socket cap screws 1To install the propeller
deflector
18mm Hex
socket
18mm, suitable for M12 hexagon
bolts 2To install the main bolts in the
boat's transom
10mm Hex
socket
10mm, suitable for M6 hexagon
bolts 1For the 12V power line
connectio
13mm Hex
socket
13mm, suitable for M8 hexagon
bolts 1To connect and fix the bus box
to the BDU busbar assembly
30mm Hex
socket 30mm, suitable for M20 nuts 1 To install the propeller
Torque Wrench Torque range: 0~100Nm 1
To control the torque during
the installation of the outboard
and boat mounting bolts
Cross-head
Screwdriver / 1 For DCDC and other installations
Crane Lifting capacity ≥ 500kg 1 To lift and install the outboard
Lifting Rope Bearing capacity ≥ 500kg 1 To lift and install the outboard
Wire Cutter EC-50M 1For cutting the battery terminal
power cables
Wire Stripper SW-1018 1For stripping the battery
terminal power cables
Crimping Plier / 1 For crimping the battery
terminal power cables
Heat Gun / 1 For shrinking heat shrink tubes

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Tool Specification Qty. Purpose
Electric Drill Hole requirement: φ13mm 1Drill holes in the boat for
outboard installation
13mm drill bit Hole requirement: φ13mm 1Drill holes in the boat for
outboard installation
100mm Hole
saw Meet the hole size: 100mm 1 Make holes for cable routing
Sealant Structural adhesive 1 Seal up holes to prevent water
ingress
1.2 Parts and Diagram
Propeller
(Purchase
Separately)
Gearbox
Mounting Bracket
(inc serial number)
Removable eye
bolts for lifting
Coolant Filler Cap
Filler Port Notch
Coolant Level
ECU
Motor
Top Cover
Underwater
Body
Power and
Communication
Cable
Electric Tilt & Trim
4G Antenna
Interface
Sound and Light
Alarm Interface
Communication Interface
for Smart Tiller
Communication Interface
for Interactive System
High Voltage
Interlock
Interface 2
High Voltage
Interlock
Interface 1
NMEA2000
Interface
Figure 1-1

16
Figure 1-2
Figure 1-3
Propeller
(Purchase
Separately)
Gearbox
Mounting Bracket
(inc serial number)
Removable eye
bolts for lifting
Coolant Filler Cap
Filler Port Notch
Coolant Level
ECU
Motor
Top Cover
Underwater
Body
Power and
Communication
Cable
Electric Tilt & Trim
4G Antenna
Interface
Sound and Light
Alarm Interface
Communication Interface
for Smart Tiller
Communication Interface
for Interactive System
High Voltage
Interlock
Interface 2
High Voltage
Interlock
Interface 1
NMEA2000
Interface
Propeller
(Purchase
Separately)
Gearbox
Mounting Bracket
(inc serial number)
Removable eye
bolts for lifting
Coolant Filler Cap
Filler Port Notch
Coolant Level
ECU
Motor
Top Cover
Underwater
Body
Power and
Communication
Cable
Electric Tilt & Trim
4G Antenna
Interface
Sound and Light
Alarm Interface
Communication Interface
for Smart Tiller
Communication Interface
for Interactive System
High Voltage
Interlock
Interface 2
High Voltage
Interlock
Interface 1
NMEA2000
Interface
Propeller
(Purchase
Separately)
Gearbox
Mounting Bracket
(inc serial number)
Removable eye
bolts for lifting
Coolant Filler Cap
Filler Port Notch
Coolant Level
ECU
Motor
Top Cover
Underwater
Body
Power and
Communication
Cable
Electric Tilt & Trim
4G Antenna
Interface
Sound and Light
Alarm Interface
Communication Interface
for Smart Tiller
Communication Interface
for Interactive System
High Voltage
Interlock
Interface 2
High Voltage
Interlock
Interface 1
NMEA2000
Interface

17
1.3 Specification
Model X40-L / X40-XL
Rated input power 40 kW
Recommended battery ePropulsion Lithium Iron Phosphate Battery
Rated input voltage 96 Vdc
Input voltage range (high voltage) 86-115Vdc
Input voltage range (low voltage) 10.5-16Vdc
Weight L: 104 kg XL: 106 kg
Shaft length (from bracket clamp to anti-
cavitation plate, see Figure 1.4) L: 508 mm XL: 635 mm
Dimensions (Length * Width * Height) L: 757 mm x 360 mm x 1233 mm
XL: 757 mm x 360 mm x 1360 mm
Cooling method Closed-loop liquid cooling
Rated rotational speed 1800 rpm
Rated power rotational speed range 1500-2100 rpm
Operating Temperature -5 - 55 ℃
Storage Temperature -25 - 70 ℃
Control System Smart Throttle, Smart Tiller, Digital Helm,
Digital Helm Pro, Smart Display 5"
ePropulsion Connectivity Service Supported
Assisted Driving Supported ADAS L1
Suitable propeller (purchase separately)
X20/X40 propeller 15'' x 10 3/4'' RH
X20/X40 propeller 15'' x 10 3/4'' LH
X20/X40 propeller 13 3/8'' x 16 3/4" RH
X20/X40 propeller 13 3/8'' x 16 3/4" LH
Trim adjustment device Standard electric power tilt & trim
Tilt Angle -4° - 61°
Steering device Standard electric steering device
Steering angle ±45°
When the high-voltage input voltage is below 96Vdc, there will be an undervoltage alarm.

18
1.4 Model and Shaft Length Selection
For X-series outboard motors, the shaft length refers to the distance from the bracket clamp to
the lower surface of the anticavitation plate.
The mounting height can have a significant effect on performance. If it's too high, this may
cause cavitation, leading to loss of speed, ineciency, and propeller damage. But if it's too low
this will increase drag, which will also slow the boat down.
Optimal mounting height is dependent on several factors including the boat's underwater prole.
Ideally it should be tested at different heights. But the following is a good guide for most con-
ventional boats, in consultation with your dealer.
Transom Height Recommended Model
＜470mm X40 - L
470mm~595mm X40 - XL
1.5 Important Notes
1.5.1 Motor Selection
Please follow the instructions of the boat manufacturer and ePropulsion authorised dealer in
choosing a suitable outboard motor. Do not exceed the maximum power permitted, and do not
overload the motor.
1.5.2 Motor Installation
This manual gives installation advice that must be followed as a condition of use, in addition to
which:
1. We strongly advise professional installation of the whole motor system.
Transom Height
Shaft Length
Figure 1-4