1. Introduction
This manual provides essential instructions for the installation, operation, and maintenance of your Bennett Marine Trim Tab Kit, model 2412. This kit includes 24 x 12 inch trim tabs and actuators, designed to enhance your vessel's performance and handling. Please read this manual thoroughly before proceeding with installation or operation to ensure safe and efficient use.
Note: This kit is supplied without a control system. A compatible Bennett Marine control system must be purchased separately for full functionality.
2. Safety Information
Always observe the following safety precautions:
- Professional Installation Recommended: Installation of trim tabs involves drilling into the transom and connecting to the vessel's electrical system. Incorrect installation can lead to serious damage to the vessel or personal injury. It is highly recommended that installation be performed by a qualified marine technician.
- Electrical Safety: Disconnect all power to the vessel's electrical system before beginning any electrical work. Ensure all wiring connections are secure and properly insulated to prevent short circuits and corrosion.
- Water Intrusion: Ensure all drilled holes are properly sealed with marine-grade sealant to prevent water intrusion into the hull.
- Moving Parts: Keep hands and clothing clear of the trim tabs and actuators when the system is operational to avoid injury.
- Operation: Operate trim tabs only when the vessel is in motion and at a safe speed. Avoid sudden or excessive adjustments.
3. Setup and Installation
This section outlines the general steps for installing your Bennett Trim Tab Kit. Refer to the detailed installation guide provided with your separate control system for specific wiring and mounting instructions.
Image 1: Bennett Marine Trim Tab Kit 24 x 12, showing the trim plane and hydraulic actuator.
3.1 Components Overview
The kit includes:
- Trim Planes (24 x 12 inches)
- Actuators (hydraulic cylinders)
- Mounting Hardware (screws, hinges)
Note: A hydraulic power unit and control switch are required for operation and are sold separately.
3.2 Mounting Location
- Transom Preparation: Identify suitable mounting locations on the transom, ensuring sufficient clearance for the trim planes and actuators. The bottom edge of the trim tab should be flush with the bottom of the hull.
- Actuator Placement: The actuators should be mounted vertically, typically centered on the trim plane, and secured to the transom above the waterline.
- Drilling: Carefully mark and drill all necessary holes for mounting the hinges and actuators. Use appropriate drill bits and ensure holes are perpendicular to the surface.
- Sealing: Apply marine-grade sealant generously to all drilled holes and fastener threads before securing components to prevent water leaks.
3.3 Hydraulic and Electrical Connections
Connect the hydraulic lines from the actuators to the hydraulic power unit. Ensure all connections are tight and free of leaks. Connect the power unit to the vessel's electrical system according to the separate control system's instructions. Verify correct polarity and fuse protection.
4. Operating Instructions
Trim tabs allow you to adjust the running attitude of your boat, improving performance, fuel efficiency, and ride comfort. This kit requires a separate Bennett Marine control system for operation.
4.1 Basic Principles of Trim Tab Use
- Bow Down: To lower the bow (e.g., for better visibility, smoother ride in chop), deploy the trim tabs downwards. This increases lift at the stern.
- Bow Up: To raise the bow (e.g., for higher speed, drier ride in following seas), retract the trim tabs upwards.
- Correcting List: If the boat lists to one side, deploy the trim tab on the higher side to bring that side down.
4.2 Operation Guidelines
- Start with Tabs Up: Begin operation with trim tabs fully retracted (up).
- Small Adjustments: Make small, momentary adjustments to the trim tabs. Observe the boat's response before making further changes.
- Speed Dependent: The effect of trim tabs is more pronounced at higher speeds.
- Avoid Over-Trimming: Excessive trim tab deployment can cause the bow to plow, reducing speed and increasing fuel consumption.
- Retract When Docking/Anchoring: Always retract trim tabs fully when docking, anchoring, or trailering to prevent damage.
5. Maintenance
Regular maintenance ensures the longevity and reliable operation of your trim tab system.
5.1 Routine Checks
- Visual Inspection: Periodically inspect the trim planes, actuators, and mounting hardware for signs of corrosion, damage, or loose fasteners.
- Actuator Rods: Check actuator rods for marine growth or pitting. Clean as necessary.
- Hydraulic Lines: Inspect hydraulic lines for kinks, chafing, or leaks.
- Electrical Connections: Ensure all electrical connections are clean, tight, and free of corrosion. Apply dielectric grease to terminals if exposed.
5.2 Cleaning
Clean the trim tabs and actuators regularly with fresh water to remove salt, dirt, and marine growth. Avoid abrasive cleaners or tools that could damage the finish or seals.
5.3 Corrosion Protection
In saltwater environments, ensure proper anode protection for your vessel. While Bennett trim tabs are designed for marine use, additional sacrificial anodes on the transom can help protect all underwater metals from galvanic corrosion.
6. Troubleshooting
This section provides solutions to common issues. For complex problems, consult a qualified marine technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Trim tabs do not respond. | No power to control unit; Blown fuse; Loose electrical connection; Faulty control switch or power unit. | Check vessel's main power; Inspect and replace fuse; Verify all electrical connections are secure; Test control switch and power unit (refer to control system manual). |
| One trim tab moves, the other does not. | Hydraulic line blockage; Faulty actuator; Air in hydraulic system; Issue with control unit's solenoid for that side. | Inspect hydraulic lines for kinks; Check actuator for damage; Bleed hydraulic system (refer to power unit manual); Consult control system manual for solenoid testing. |
| Trim tabs move slowly or erratically. | Low hydraulic fluid level; Air in hydraulic system; Weak electrical power; Corroded connections. | Check and refill hydraulic fluid reservoir; Bleed hydraulic system; Verify battery voltage and connections; Clean and secure electrical connections. |
| Trim tabs do not fully retract or deploy. | Marine growth on actuators/planes; Obstruction; Actuator damage; Hydraulic system issue. | Clean trim tabs and actuators; Check for physical obstructions; Inspect actuators for damage; Refer to hydraulic system troubleshooting. |
7. Specifications
Key specifications for the Bennett Trim Tab Kit 24 x 12 (Model 2412):
| Feature | Detail |
|---|---|
| Model Number | 2412 |
| Trim Tab Dimensions | 24 inches (width) x 12 inches (chord) |
| Product Dimensions (overall) | 18 x 10 x 6 inches (packaging/shipping dimensions) |
| Item Weight | 34 pounds |
| Manufacturer | Bennett Trim Tabs |
| ASIN | B000N9I15Y |
| Control System | Not included (requires separate purchase) |
8. Warranty and Support
For specific warranty information regarding your Bennett Marine Trim Tab Kit, please refer to the documentation provided by Bennett Marine at the time of purchase or visit the official Bennett Marine website. Warranty terms typically cover manufacturing defects for a specified period.
For technical support, replacement parts, or further assistance, please contact Bennett Marine directly through their official customer service channels. Ensure you have your product model number (2412) and purchase details available when contacting support.
Bennett Marine Official Website: www.bennetttrimtabs.com
