1. Introduction
Thank you for choosing the APISQUEEN X2 Underwater Thruster Set. This manual provides essential information for the safe and efficient operation, setup, and maintenance of your thruster system. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
2. Package Contents
The APISQUEEN X2 Underwater Thruster Set is available in several configurations. Please verify the contents of your package against the list below:
Set 1:
- X2 Underwater Thruster x 2
- 45A Splash-Proof ESC (No BEC) x 2
- A300 Remote Control x 1
- Receiver x 1
- External BEC x 1
- XT60 Plug x 1
Set 2:
- X2 Underwater Thruster x 2
- 30A Splash-Proof ESC (with BEC) x 2
- A300 Remote Control x 1
- Receiver x 1
- XT60 Plug x 1
Set 3:
- X2 Underwater Thruster x 2
- 45A Waterproof ESC (No BEC) x 2
- A300 Remote Control x 1
- External BEC x 1
- Receiver x 1
- XT60 Plug x 1
Set 4:
- X2 Underwater Thruster x 2
- 30A Waterproof ESC (With BEC) x 2
- A300 Remote Control x 1
- Receiver x 1
- XT60 Plug x 1

3. Specifications
| Feature | Specification |
|---|---|
| Voltage | 12-16V (2-4S LiPo) |
| KV Rating | 830KV |
| Total Thrust | 4.2kg (9.3lbs) |
| Maximum Power | 224W |
| Continuous Power | 84W |
| Maximum Current | 15A |
| Continuous Operating Current | 7A |
| Operating Environment | Freshwater use only |
| Thruster Material | ABS |
| Motor Type | Brushless Outrunner DC Motor |
| Weight (per thruster) | 117g |
| Processing | 3D Printed (propeller and hub customizable) |
| Recommended Age | 14+ years |



4. Setup Instructions
Careful assembly and wiring are crucial for the proper function and safety of your thruster set. Refer to the wiring diagram below and follow these steps:

- Mount Thrusters: Securely attach the X2 thrusters to your ROV or toy boat chassis. Ensure they are positioned to provide effective propulsion and steering.
- Connect Thrusters to ESCs: Each thruster has three motor wires. Connect these wires to the three corresponding output wires on an Electronic Speed Controller (ESC). The order of connection may affect motor rotation direction; if a thruster spins in the wrong direction, swap any two of the three motor wires.
- Connect ESCs to Receiver: Each ESC has a signal cable (typically a 3-wire servo connector). Connect the signal cable from each ESC to the appropriate channel on your receiver (e.g., Channel 1 for left thruster, Channel 2 for right thruster).
- Power Connection (Battery to ESCs):
- If your ESCs have built-in BECs (Battery Eliminator Circuit), connect the main power leads (red/black) of the ESCs to the XT60 plug, which will then connect to your LiPo battery. The BEC will power the receiver.
- If your ESCs do NOT have built-in BECs (e.g., 45A splash-proof/waterproof ESCs), you will need an external BEC. Connect the main power leads of the ESCs to the XT60 plug. Connect the external BEC to the XT60 plug (or directly to the battery leads) and then connect the BEC's output (typically a servo connector) to an unused channel or the battery port on your receiver to provide power.
- Receiver and Remote Control Pairing: Follow the instructions provided with your A300 remote control and receiver to pair them. Ensure the receiver is powered correctly (either by an ESC's BEC or an external BEC).
- Initial Test: Before placing in water, perform a dry test. With the propellers clear of any obstructions, slowly increase throttle to ensure all components are functioning and thrusters spin correctly.
5. Operating Instructions
- Power On Sequence: Always turn on your A300 remote control first, then connect the battery to your thruster system.
- Operating Environment: This thruster set is designed for freshwater use only. Do not operate in saltwater or chlorinated water, as this can cause corrosion and damage.
- Control: Use the joystick and buttons on the A300 remote control to operate the thrusters. Typically, one joystick controls throttle (forward/reverse) and the other controls steering (differential thrust for turning). Familiarize yourself with the remote's functions in a safe, controlled environment.
- Power Off Sequence: Disconnect the battery from the thruster system first, then turn off your A300 remote control.
Video 1: Demonstration of the X2 thruster's water propulsion.
6. Maintenance
- Rinse After Use: After each use in freshwater, thoroughly rinse the thrusters and any submerged components with clean, fresh water to remove any sediment or debris.
- Inspect Propellers: Regularly check the propellers for any entangled debris (weeds, fishing line, etc.). Carefully remove any obstructions to prevent damage to the motor or reduced performance.
- Inspect Wiring: Periodically inspect all wiring and connections for signs of wear, corrosion, or damage. Replace any damaged components immediately.
- Storage: Store the thruster set in a dry, cool place away from direct sunlight and extreme temperatures.
- Battery Care: Follow the manufacturer's guidelines for charging, discharging, and storing your LiPo batteries.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Thrusters do not power on | Battery not connected or discharged; loose wiring; ESC not armed; receiver not powered. | Check battery connection and charge level. Verify all wiring connections. Ensure remote is on and receiver is powered. Re-arm ESCs (throttle to max, then min). |
| No thrust or weak thrust | Propeller obstructed; motor or ESC malfunction; low battery voltage. | Check propellers for debris. Inspect motor and ESC connections. Charge battery. Test individual components if possible. |
| Erratic or unresponsive control | Remote/receiver not paired; signal interference; damaged receiver or remote. | Re-pair remote and receiver. Ensure no strong radio interference sources nearby. Check for physical damage to receiver/remote. |
| Thruster spins in wrong direction | Motor wire connection order. | Swap any two of the three motor wires connecting the thruster to the ESC. |
8. User Tips
- Test in a Controlled Environment: Before deploying your ROV or boat in open water, always perform initial tests in a shallow, clear, and controlled environment (e.g., a large tub or pool) to familiarize yourself with the controls and ensure everything is working correctly.
- Secure All Connections: Vibrations and water can loosen connections. Ensure all plugs and wires are securely fastened and consider using waterproof heat shrink tubing or marine-grade sealant for critical connections if operating in wet conditions.
- Monitor Battery Levels: Always monitor your battery voltage during operation to avoid over-discharging, which can damage LiPo batteries.
9. Warranty and Support
For warranty information, technical support, or replacement parts, please contact the seller directly through the platform where you purchased this product. Provide your order details and a clear description of the issue for prompt assistance.