Hobbywing Technology SeaKing-25A, SeaKing-35A, SeaKing-60A User Manual

User Manual of “SeaKing” Series Brushless Speed Controller for Boat Doc Ver. HW-15-OEM-080626.1 Page - 1 -

Declaration

Thanks for purchasing “SeaKing” series Electronic Speed Controller (ESC) for boat. High power system for
RC model can be very dangerous, so we strongly suggest you read this manual carefully. In that we have no
control over the correct use, installation, application, or maintenance of our products, no liability shall be
assumed nor accepted for any damages, losses or costs resulting from the use of the product. Any claims
arising from the operating, failure of malfunctioning etc. will be denied. We assume no liability for personal
injury, consequential damages resulting from our product or our workmanship. As far as is legally permitted,
the obligation to compensation is limited to the invoice amount of the affected product.

Features

The “SeaKing” series brushless controllers include ESCs of 25A, 35A and 60A for boats.

1. Specially designed for RC boat, with excellent start-up, acceleration and linearity features.

2. Use top quality electronic components to enhance the current endurance ability of the ESC.

3. With water cooling system and the whole ESC is waterproof to get a longer life.

4. 2 running modes, “Forward Only” mode and “Forward/Backward” mode.

5. With brake function to make it easier to control the boat.

6. Multiple protection features: Low voltage cut-off protection for lithium or nickel battery / Over-heat protection /
Throttle signal loss protection.

7. 8 steps of timing adjustment, compatible with all kinds of sensorless brushless motor.

Spe

cifications

Model SeaKing-25A SeaKing-35A SeaKing-60A

Cont. Current

25A 35A 60A

Burst Current

90A 190A 380A

Resistance

0.005 ohm 0.0015 ohm 0.0007 ohm

Battery

4-12 Cells Ni-xx (NiMH or NiCd) or 2-4 Cells Li-Po
When using 9-12 cells NiMH/NiCd or 4 cells Lipo battery, you must disable the output of the built-in
BEC and supply the receiver with a 3Amp UBEC. (*Note1)

BEC Output

6V/1.5A

Motor Type

Sensorless Brushless Motor

Dimension

31.5* 27.5* 16

Weight

23g(Without wires) 30g(Without wires) 32g(Without wires)

*Note1: To disable the built-in BEC, please cut the red wire in the trio of the receiver wires.

Begin To Use The New ESC

1. Connect the ESC, motor, receiver, battery and servo
according to the following diagram

“+” and “-” wires on the ESC are connected with the battery pack,
and #A, #B and #C are connected with the motor wires. The
“SET” button is used for programming the ESC.
The control cable of the ESC (trio wires with black, red and white
color) is connected with the throttle channel of the receiver
(Usually CH2).
The #A, #B, #C wires of the ESC can be connected with the
motor wires freely (without any order). If the motor runs in the
opposite direction, please swap any two wire connections.

Note: You can use the transmitter to set the throttle channel
to the “Reverse” direction, and then the motor will run
reversely. Please calibrate the throttle range again after
changing the direction of throttle channel.

2. Throttle Range Setting (Throttle Range Calibration)

In order to make the ESC fit the throttle range, you must calibrate it for the following cases; otherwise the ESC cannot
work properly.

1) Begin to use a new ESC;

2) Begin to use a new transmitter;

3) Change the settings of neutral position of the throttle stick, ATV or EPA parameters, etc.
There are 3 points need to be set, they are the top point of “forward”,” backward” and the neutral point.

User Manual of “SeaKing” Series Brushless Speed Controller for Boat Doc Ver. HW-15-OEM-080626.1 Page - 2 -

The following pictures show how to set the throttle range with a FutabaTM transmitter.

A) Switch off the ESC, turn on the transmitter,

set the “EPA/ATV” value of throttle channel to
“100%”, and

disable the “ABS” brake function

of your transmitter if it does has this function.

B) Hold the “SET” key and then switch on the

ESC, when the red LED begins to flash,
release the key immediately. (Please refer to
the picture on the right side)

(*Note2)

C) Set 3 points according to

the steps shown in the
picture on the right side.

1) Neutral point

2) End point of forward
direction

3) End point of backward
direction

D) When the process of

calibration is finished, the
motor can be started after
3 seconds.

*Note2: If you don’t release the “SET”
key after the red LED begins to flash,
the ESC will enter the program mode,
in such a case, please switch off the
ESC and re-calibrate the throttle range
again from step A to step D.

If you are not using a gun-style
transmitter, please refer to the
right picture to set the throttle range.

3. The LED Status

In normal use, if the throttle stick is in the neutral range, neither the red LED nor the green LED lights.

a) The red LED lights when the boat is run forward or backward.
b) The green LED lights when the throttle stick is moved to the top point (end point) of the forward zone or backward

zone.

c) The red LED flashed quickly when the boat is braking.
d) If the ESC is over heat, the output power will be gradually cut-off to protect the ESC, in such a case, the Green

LED will flash in such a way: “Flashes-----Flashes-----Flashes-----”

Alert Tones

1. Input voltage abnormal alert tone: The ESC begins to check the input voltage when power on, if it is out of the
normal range, such an alert tone will be emitted: “beep-beep-, beep-beep-, beep-beep-” (There is 1 second time
interval between every “beep-beep-” tone).

2. Throttle signal abnormal alert tone: When the ESC can’t detect the normal throttle signal, such an alert tone will
be emitted: “beep-, beep-, beep-” (There is 2 seconds time interval between every “beep-” tone).

Protection Function

1. Low voltage cut-off protection: If the voltage of a lithium battery pack is lower than the threshold for 2 seconds,
the ESC will cut of the output power. Please note that the ESC cannot be restarted if the voltage of each lithium
cell is lower than 3.5V.
For NiMH/NiCd battery packs, if the voltage of the whole NiMh/NiCd battery pack is higher than 9.0V but lower
than 12V, it will be considered as a 3 cells lithium battery pack; If it is lower than 9.0V, it will be considered as a 2

cells lithium battery pack. For example, if the NiMH battery pack is 8.0V, and the threshold is set to 2.6V/Cell, so
it will be considered as a 2 cells lithium battery pack, and the low-voltage cut-off threshold for this NiMH battery
pack is 2.6*2=5.2V.

2. Over-heat protection: When the temperature of the ESC is over a special value for 5 seconds, the ESC will
gradually cut off the output power.

3. Throttle signal loss protection: The ESC will cut off the output power if the throttle signal is lost for 0.2 second.