🌊 All-in-One Electric Propulsion. Ready to Ride.

The Firduo TUNA Thrust System is a fully integrated 1500W electric fin thruster designed for SUP, kayak, surfboard, and hydrofoil applications. Unlike standalone motors, the TUNA combines a fully waterproof motor and built-in waterproof ESC into a single compact unit — just add a battery and a PPM/PWM remote and you're ready to go.

With up to 18.5 KGF of thrust at 1430W, a 360° large-flow water inlet, and a multi-functional installation module compatible with universal fin boxes and DIY mounts, the TUNA is the fastest path from idea to water. Available in 4 variants: two mounting configurations (A2-1 / A2-2) each in CW and CCW propeller rotation.

📄 Download TUNA Thrust System 2D Drawings (PDF)

⚡ Key Features

• ✅ Fully Integrated System — waterproof motor + waterproof ESC in one compact unit; no separate ESC required
• ✅ 18.5 KGF Max Thrust @ 30A / 1430W — powerful enough for SUP, kayak, and surfboard propulsion
• ✅ 1500W Continuous / 2000W Peak Power — sustained performance for extended sessions
• ✅ 360° Large-Flow Water Inlet — fluid hydrodynamic design minimizes drag and maximizes efficiency
• ✅ Multi-Functional Installation Module — universal fin box interface or DIY custom mount
• ✅ CW & CCW Propeller Options — Single drive, with the option to freely choose between CW and CCW.If dual drive is required, please select both CW and CCW.
• ✅ High-Strength Anodized Aluminum Shell — corrosion-resistant for saltwater and freshwater use
• ✅ PPM/PWM Remote Compatible — works with any standard RC remote or waterproof remote controller
• ✅ 50A Waterproof Power Plug — Optional 10AWG silicone power cord
• ✅ Easy Installation — fits surfboards, paddle boards, kayaks, SUP, and custom builds

📋 Full Specifications

Thrust Performance (13S Reference Voltage)

📦 What's in the Box

TT160-A2-1 — Tail Fin Version

• ① Thrust System × 1(CW or CCW, matched to variant)
• ② Tail fin base × 1, Pin × 2 (including 1 extra)
• ③ M4×16 screws × 3 (including 1 extra)
• ④ M2.5 wrench × 1
• ⑤ 50A waterproof power plug-socket × 1 (optional)
• 

TT160-A2-2 — DIY Version

• ① Thrust System × 1(CW or CCW, matched to variant)
• ② M4×16 screws × 3 (including 1 extra)
• ③ M2.5 wrench × 1
• ④ 50A waterproof power plug-socket × 1 (optional)
• 

⚠️ Battery and remote controller not included. If you need batteries, please contact us for recommendations.

🔗 Compatible Builds & Recommended Pairings

• SUP / Paddleboard — universal fin box mount for instant electric conversion
• Kayak / Canoe — DIY interface for custom transom or hull mounting
• Electric Surfboard / Foilsurf — rear fin box or custom mount
• ROV / AUV / USV — waterproof motor + ESC system for autonomous applications
• Recommended Remote: Firduo VX3 Waterproof Remote Controller — IP67, PPM/PWM compatible, designed for water sports
• Recommended Connector: Firduo 50A Waterproof Power Connector — Power matching with propulsion system
• Battery: 10S–14S LiPo or Li-ion pack, minimum 30A continuous discharge recommended

🛠️ Setup Guide

1. Select your variant — choose your mounting model (A2-1 for universal fin box; A2-2 for DIY/custom mount) and propeller rotation (CW or CCW). When viewed from behind the board, CW rotates clockwise. Single drive, with the option to freely choose between CW and CCW.If dual drive is required, please select both CW and CCW.
2. Mount the thruster — insert the TUNA into your board's fin box or attach via the DIY interface. Secure with the provided hardware. Ensure the propeller has clear water flow and the power/signal cables are routed safely away from the propeller.
3. Connect the power cable — plug the 50A waterproof power connector into your battery output. Verify battery voltage is within 36–58.8V (10S–14S) before connecting. Use a battery with at least 30A continuous discharge rating.
4. Connect the signal cable — plug the 3-wire signal cable (black −, red +, white signal) into your remote receiver's PPM or PWM output channel. The TUNA's built-in ESC accepts standard PPM/PWM signals — no additional ESC configuration required.
5. Pair your remote — power on the system (battery first, then remote). Follow your remote's pairing procedure. The Firduo VX3 pairs automatically on first power-on.
6. Water test at low power — start at 10–15A (500–750W) in calm water. Verify smooth operation and check all connections are secure and dry before increasing to full power.

❓ FAQ

Q1: What's the difference between TT160-A2-1 and TT160-A2-2?
The two models differ in their mounting interface. TT160-A2-1 uses a universal fin box interface compatible with standard SUP and surfboard fin boxes — the easiest option for most boards. TT160-A2-2 uses a DIY custom interface for non-standard mounts, kayak transoms, or custom hull installations. Both deliver identical thrust performance. If you have a standard fin box on your board, choose A2-1.

Q2: CW or CCW — which rotation do I need?
When viewed from behind the board (water-facing side), CW rotates clockwise and CCW rotates counter-clockwise. Single drive, with the option to freely choose between CW and CCW. If you're building a twin-thruster setup, use one CW and one CCW for balanced thrust. If unsure, contact us with your board specs and we'll advise.

Q3: Do I need a separate ESC? What remote is compatible?
No — the TUNA includes a fully integrated waterproof ESC. You only need a battery and a PPM/PWM remote receiver. The system is compatible with any standard RC remote that outputs PPM or PWM signals. We recommend the Firduo VX3 Waterproof Remote for a plug-and-play waterproof solution.

Q4: What battery do I need?
The TUNA supports 10S–14S (36–58.8V) battery packs. For full-power operation at 18.5 KGF, a 13S or 14S LiPo or Li-ion pack with minimum 30A continuous discharge is recommended. A 10S–12S pack will work at reduced thrust. Do not exceed 14S (58.8V) to avoid damaging the built-in ESC. Battery is not included.

Q5: Can I use the TUNA for an ROV, AUV, or non-board application?
Yes. The TUNA's integrated waterproof motor and ESC, combined with standard PPM/PWM signal input, make it suitable for ROV, AUV, USV, and other autonomous or remotely operated marine applications. The 50A waterproof power connector and sealed housing support continuous underwater operation. Contact us for application-specific wiring diagrams and configuration support.