1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Lewmar TT 185 6.0kW 12V Gen 2 Thruster. Please read this manual thoroughly before attempting any installation or operation. Retain this manual for future reference.
The Lewmar TT 185 thruster is designed to provide powerful and reliable lateral thrust for improved vessel maneuverability. It features a high-performance 5-blade propeller and a robust design for marine environments.
2. Safety Information
Important Safety Instructions:
- Always disconnect power before performing any installation, maintenance, or inspection.
- Ensure all electrical connections are secure and properly insulated to prevent short circuits and corrosion.
- Installation should be performed by qualified personnel familiar with marine electrical and mechanical systems.
- Keep hands and loose clothing clear of the propeller when the thruster is in operation or connected to power.
- Refer to local regulations and standards for marine equipment installation.
3. Setup and Installation
Proper installation is crucial for the performance and longevity of your thruster. Follow these guidelines carefully.
3.1 Unpacking and Inspection
Upon receiving the thruster, carefully unpack all components and inspect for any signs of shipping damage. Report any damage immediately to the carrier and supplier.
Figure 1: Lewmar TT 185 6.0kW 12V Gen 2 Thruster. This image shows the complete thruster unit, including the motor housing (black and white), the mounting flange, and the white tunnel with the black 5-blade propeller visible at one end.
3.2 Tunnel Installation
The thruster tunnel must be securely integrated into the vessel's hull. Ensure the tunnel is positioned correctly to avoid cavitation and maximize thrust efficiency.
- Determine the optimal location for the thruster tunnel, typically forward of the keel and away from other underwater appendages.
- Cut a hole in the hull according to the specified diameter for the TT 185 thruster tunnel.
- Securely bond the tunnel into the hull using appropriate marine-grade epoxies or sealants, ensuring a watertight seal.
3.3 Motor and Gearbox Assembly Installation
Mount the motor and gearbox assembly onto the installed tunnel.
- Ensure the mounting surface on the tunnel is clean and flat.
- Position the motor and gearbox assembly onto the tunnel flange, aligning the propeller shaft with the tunnel.
- Secure the assembly using the provided fasteners, tightening them to the recommended torque specifications.
- Verify that the 5-blade propeller is free to rotate within the tunnel without obstruction. The spline-driven propeller design eliminates the need for a drive pin.
3.4 Electrical Connections
Connect the thruster to the vessel's 12V DC electrical system. Use appropriately sized marine-grade cabling and circuit protection.
- Connect the main power cables to the thruster motor terminals, observing correct polarity.
- Install a suitable fuse or circuit breaker in the main power supply circuit, as specified in the electrical diagram.
- Connect the control wiring to the thruster control panel.
- Ensure all connections are tight and protected from moisture and corrosion.
4. Operating Instructions
The Lewmar TT 185 thruster is designed for intermittent use to assist with docking and maneuvering in confined spaces.
4.1 Pre-Operation Checks
- Ensure the thruster area is clear of obstructions.
- Verify that the vessel's battery voltage is adequate for thruster operation.
- Confirm all electrical connections are secure.
4.2 Basic Operation
- Turn on the main power switch for the thruster system.
- Use the control panel joystick or buttons to activate the thruster in the desired direction (port or starboard).
- Apply thrust in short bursts (typically 2-3 seconds) rather than continuous operation to prevent overheating.
- Allow a brief cool-down period between bursts of thrust.
- After use, turn off the main power switch for the thruster system.
Note: The thruster provides equal thrust in both directions due to its high-performance 5-blade propellers.
5. Maintenance
Regular maintenance ensures the reliability and extends the lifespan of your Lewmar thruster. Always disconnect power before maintenance.
5.1 Annual Inspection
- Inspect the propeller for damage, fouling, or marine growth. Clean as necessary.
- Check all electrical connections for corrosion or looseness. Clean and re-tighten as required.
- Examine the motor housing and gearbox for any signs of leaks or damage. The thruster features a high-integrity seal and requires no reservoir or maintenance for the gearbox.
- Verify the integrity of the tunnel bonding to the hull.
5.2 Winterization
If operating in freezing conditions, ensure the thruster tunnel is drained or protected from ice formation.
6. Troubleshooting
This section provides solutions to common issues. For problems not listed, contact Lewmar support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Thruster does not operate | No power to the thruster; Blown fuse/tripped breaker; Loose electrical connection; Faulty control panel. | Check main power switch and battery voltage; Inspect and replace fuse or reset breaker; Verify all electrical connections; Test control panel. |
| Reduced thrust | Fouled propeller; Low battery voltage; Marine growth in tunnel. | Inspect and clean propeller; Charge or replace batteries; Clean thruster tunnel. |
| Motor overheats | Continuous operation; Obstruction in propeller; Low voltage. | Operate in short bursts; Check for and remove obstructions; Ensure adequate battery voltage. |
7. Specifications
Key technical specifications for the Lewmar TT 185 6.0kW 12V Gen 2 Thruster.
| Feature | Detail |
|---|---|
| Model | TT 185 6.0kW 12V Gen 2 |
| Part Number | 590012LEW |
| Power | 6.0 kW |
| Voltage | 12V DC |
| Propeller Type | 5-blade, Spline Driven |
| Item Weight | 1 pounds (Note: This weight seems unusually low for a thruster of this power. Please refer to official Lewmar documentation for precise shipping/installed weight.) |
| Product Dimensions | 18 x 10 x 6 inches (Note: These dimensions likely refer to packaging or a specific component, not the full installed unit. Refer to official Lewmar documentation for installation dimensions.) |
| Manufacturer | Lewmar |
8. Support and Warranty
For technical assistance, spare parts, or warranty claims, please contact Lewmar customer support or visit their official website.
- Lewmar Official Website: www.lewmar.com
- Refer to your purchase documentation for specific warranty terms and conditions.
