Hobbywing Technology SeaKing-25A User Manual Download Page 1

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

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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. 
 
 
 

Summary of Contents for SeaKing-25A

Page 1: ...King 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 ...

Page 2: ...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 i...

Page 3: ... is suitable for training Note Forward Reverse with Brake mode uses Double Click method to make the boat go backward When you move the throttle stick from forward zone to backward zone for the first time the ESC begins to brake the motor the motor speeds down but it is still running not completely stopped so the backward action is NOT happened now When the throttle stick is moved to the backward z...

Page 4: ... Boat Doc Ver HW 15 OEM 080626 1 Page 4 4 Program The ESC You can program the ESC with the SET key In the program process the motor will emit Beep tone at the same time when the LED is flashing In a noisy environment perhaps you cannot hear the Beep tone clearly ...

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