1. Introduction
Thank you for choosing the Flipsky 65161 Brushless Motor Underwater Thruster. This high-performance, waterproof thruster is designed for a variety of aquatic applications, including Remotely Operated Vehicles (ROVs), RC boats, jet boards, and other outboard propulsion systems. This manual provides essential information for the safe and effective setup, operation, and maintenance of your thruster.
2. Product Overview
The Flipsky 65161 thruster features a robust, waterproof design, ensuring reliable operation in submerged environments. It is equipped with a powerful brushless motor capable of delivering significant thrust for various watercraft. The thruster comes with a mounting bracket for easy installation and appropriate connectors for power integration.



3. Specifications
| Feature | Specification |
|---|---|
| Voltage Range | 6-20S (25.2-84V) |
| Max Spin Speed (RPM) | 16380 |
| KV (RPM/V) | 120KV / 100KV (selectable) |
| Max Power | 6000W (Rated: 3000W) |
| Peak Current | 200A |
| Number of Poles | 6 (3 pairs for setup) |
| Max Torque at 60% | 9NM |
| Dimensions | D65*L161mm |
| Max Working Temperature | 120°C |
| Insulation Voltage & Leak Current | AC500V/10MA/3S |
| Lead Wires Extension | 8AWGx1300mm |
| Waterproof Level | IP68 |
| Weight | 3kg |
| Plug Type | 8.0mm |
| Motor Wire Gauge | 8AWG |
4. Setup
Proper installation is crucial for the performance and longevity of your thruster. Ensure all connections are secure and waterproofed where necessary.
4.1 Mounting
- Choose a suitable location: Select a mounting point on your watercraft that allows for optimal thrust direction and clearance from obstacles.
- Secure the mounting bracket: Use appropriate fasteners (not included) to firmly attach the provided mounting bracket to your vessel. Ensure the bracket is stable and can withstand the forces generated by the thruster.
- Attach the thruster: Slide the thruster onto the mounting bracket and secure it using the designated screws or clamps. Verify that the thruster is aligned correctly and cannot rotate or detach during operation.
4.2 Electrical Connection
- Connect to ESC: Connect the thruster's 8AWG motor wires to a compatible Electronic Speed Controller (ESC). Ensure the ESC is rated for the thruster's peak current (200A) and voltage range (25.2-84V).
- Observe polarity: While brushless motors typically don't have strict polarity for initial connection, ensure consistent wiring for proper rotation direction. If the thruster spins in the wrong direction, swap any two of the three motor wires.
- Waterproof connections: For submerged applications, all electrical connections must be properly insulated and waterproofed using marine-grade heat shrink tubing, epoxy, or other suitable methods to maintain the IP68 rating.
- Battery connection: Connect the ESC to a battery pack within the specified voltage range (6-20S LiPo, 25.2-84V). Ensure the battery can supply the required peak current.


5. Operating Instructions
Before operating the thruster, ensure all setup steps have been completed and verified. Always perform a safety check before deploying your watercraft.
- Pre-operation check: Inspect the thruster for any visible damage, ensure the propeller is clear of debris, and all electrical connections are secure and dry.
- Power on: Connect the battery to the ESC. The ESC should initialize with a series of beeps.
- Control: Use your remote control or control system to gradually increase throttle. Observe the thruster's response and ensure smooth operation.
- Monitoring: During operation, monitor the thruster and ESC for any unusual noises, vibrations, or excessive heat.
- Post-operation: After use, disconnect the battery from the ESC. Rinse the thruster with fresh water, especially after saltwater use, to prevent corrosion.
6. Maintenance
Regular maintenance will extend the life and ensure optimal performance of your Flipsky thruster.
- Cleaning: After each use, especially in saltwater, thoroughly rinse the thruster with fresh water to remove salt, sand, and other debris.
- Inspection: Periodically inspect the propeller for damage (chips, cracks) and ensure it spins freely. Check the motor housing for any signs of leaks or damage.
- Cable integrity: Examine all cables and connectors for fraying, cuts, or corrosion. Replace damaged components immediately.
- Storage: Store the thruster in a dry, cool place away from direct sunlight and corrosive materials.
7. Troubleshooting
If you encounter issues with your thruster, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Thruster does not spin | No power, loose connection, faulty ESC/motor | Check battery, ESC, and all wiring connections. Test components individually if possible. |
| Thruster spins but no thrust | Propeller damaged or obstructed | Inspect propeller for damage or debris. Clear any obstructions. |
| Excessive vibration or noise | Damaged propeller, bent shaft, loose mounting | Check propeller balance and integrity. Ensure thruster is securely mounted. |
| Motor overheating | Overload, insufficient cooling, faulty ESC | Reduce load, ensure proper water flow for cooling. Check ESC settings. |
| Water ingress | Damaged seals, improper waterproofing of connections | Immediately cease operation. Inspect seals and waterproofed connections. Repair or replace as needed. |
8. User Tips
- Saltwater Use: While the thruster is waterproof (IP68), prolonged exposure to saltwater requires thorough rinsing with fresh water after each use to prevent corrosion and salt buildup.
- Voltage Compatibility: The thruster operates within a wide voltage range of 25.2V to 84V (6S to 20S LiPo). Ensure your battery and ESC are compatible with this range.
- Mounting: The thruster is designed to be mounted with an included bracket, suitable for various applications like SUPs, ROVs, and boats. Ensure the mount is robust for your specific application.
- Performance: The actual speed and performance on a vessel (e.g., a 300kg boat) will depend on many factors including hull design, propeller efficiency, battery capacity, and ESC settings.
9. Warranty and Support
The warranty period for consumable electronic products (e.g., ESC/Motor/Battery) is generally 2 months since the 7th day after shipment (the shipping date is checked by logistic record). For non-electronic products, the warranty period is 2 months since the 7th day after shipment (the shipping date is checked by logistic record).
You can return items to us for free repair or replacement when we get it and analyzed it as a manufacturing failure. We will bear the return back to you shipping cost only. If the replacement or repair is not possible for you, a discount can be provided for the new replacement (excludes the shipping cost). Wear and tear caused by normal use is not considered to be a defect product.
The following conditions are not covered by the above warranty:
- Cannot provide purchase channel source proof.
- Mechanical damage to electronic components or PCB.
- PCBA board has repair soldering iron traces (excluding solder the cable bullet connectors).
- Wire damage or external impact damage.
- For non-waterproof products, there is water inflow.
- Abnormal applications beyond the product specifications.
For products purchased not from https://flipsky.net, please contact the original purchase channel in first priority to deal with your problems.
For group-buy items, the warranty period will be processed since the 7th day after our received group-buy order's shipment (the shipping date is checked by logistic record). For end users, if there's any quality issue, please provide the after-sales warranty card number (which is shipped in your product package). Please keep it well when you get your product to Flipsky Service (service@flipsky.net) for process it.
For products transferred by personal second transaction, please provide your original source order number or warranty card number (only in group buy products) to us, we'll verify the purchasing source and if it's in warranty period. And warranty policy is only valid once to this product (e.g., if the original ordered product has used the warranty policy, after its second transaction personally, the warranty is invalid to this product).
Clarification: Most products are tested before shipment, especially the VESC and motors are 100% tested and shipped as a good product before shipment. Any uncertain connection or information for VESC/Motors settings, please contact us before your installation. No term warranty, in no case shall Flipsky's liability be greater than the actual purchase price of the product.
On the shipping way product orders cannot be canceled unless the extra shipping cost is agreed to be charged.
We're willful to provide repair service for reasonable charge if your product is out of warranty, while the service excludes both sides' shipping cost.
This updated warranty policy is valid since 2018/11/1, and the previous ordered products before 2018/11/1 still follow the policy before updates.