Trim Tab Zinc Anode – Fits Yamaha Outboard 50-100HP (Replaces 688-45371-02, 6E5-45371-01, 67F-45371-00-00)
Trim Tab Zinc Anode – Fits Yamaha Outboard 50-100HP (Replaces 688-45371-02, 6E5-45371-01, 67F-45371-00-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Trim Tab Zinc Anode – Fits Yamaha Outboard 50-100HP (Replaces 688-4...
Trim Tab Zinc Anode – Fits Yamaha Outboard 50-100HP (Replaces 688-45371-02, 6E5-45371-01, 67F-45371-00-00) is backordered and will ship as soon as it is back in stock.
Product Details
This high-quality Trim Tab Zinc Anode – Fits Yamaha Outboard 50-100HP (Replaces 688-45371-02) is engineered to protect the lower unit of your outboard motor from galvanic corrosion. It is designed for a broad range of Yamaha 2-stroke and 4-stroke models from 50HP to 100HP (including T50, T60, F70, F75, F80, F90, F100 series) and also fits select 115-200HP models.
This part serves as a direct cross-reference for several Yamaha and aftermarket part numbers, including 688-45371-02, 6E5-45371-01, and 67F-45371-00-00, ensuring a precise fit and reliable performance.
- Features a simple bolt-on design for quick and easy installation (M10 x 1.25mm threads).
- Manufactured from a high-grade zinc alloy that meets Mil-Spec A-18001K standards for maximum sacrificial protection in saltwater.
- Acts as both a sacrificial anode and a trim tab to help counteract propeller torque for improved steering.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Yamaha | 688-45371-02-00 |
| Yamaha | 6E5-45371-01-00 |
| Yamaha | 67F-45371-00-00 |
| Martyr | CM6884537102Z |
| Aftermarket | CAM-6884537102 |
| Aftermarket | 70-6884537102 |
| Sierra | 18-6111 |
| Sierra | 18-6070 |
Engine & Model Compatibility
Confirm your engine model and year in the table below. Verifying the OEM part number against your engine's service manual is the best way to ensure correct fitment.
This anode is confirmed to fit a wide range of Yamaha outboards. It is also compatible with select Parsun models that use the equivalent Yamaha part.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | T50LA | 50 | 4-Stroke | 688-45371-02 | |
| Yamaha | T50LB | 50 | 4-Stroke | 688-45371-02 | |
| Yamaha | T50TLR | 50 | 4-Stroke | 688-45371-02 | |
| Yamaha | T60LA | 60 | 4-Stroke | 688-45371-02 | |
| Yamaha | T60LB | 60 | 4-Stroke | 688-45371-02 | |
| Yamaha | T60TLR | 60 | 4-Stroke | 688-45371-02 | |
| Yamaha | F70LA | 70 | 4-Stroke | 688-45371-02 | |
| Yamaha | F75LA | 75 | 4-Stroke | 688-45371-02 | |
| Yamaha | F75TLR | 75 | 4-Stroke | 688-45371-02 | |
| Yamaha | F80TJR | 80 | 4-Stroke | 688-45371-02 | |
| Yamaha | F90JA | 90 | 4-Stroke | 688-45371-02 | |
| Yamaha | F90TJR | 90 | 4-Stroke | 688-45371-02 | |
| Yamaha | F90TLR | 90 | 4-Stroke | 688-45371-02 | |
| Yamaha | F90TXR | 90 | 4-Stroke | 688-45371-02 | |
| Yamaha | F90XA | 90 | 4-Stroke | 688-45371-02 | |
| Yamaha | F100TLR | 100 | 4-Stroke | 688-45371-02 | |
| Yamaha | F100TXR | 100 | 4-Stroke | 688-45371-02 | |
| Yamaha | F115 & VF115 | 115 | 4-Stroke | 688-45371-02 / 6E5-45371-01 | Fits specific 115HP models |
| Yamaha | 115HP | 115 | 2-Stroke | 688-45371-02 / 6E5-45371-01 | All 2-Stroke 115HP models |
| Yamaha | 130HP | 130 | 2-Stroke | 688-45371-02 / 6E5-45371-01 | All 2-Stroke 130HP models |
| Yamaha | 150ETL/ETX | 150 | 2-Stroke | 688-45371-02 / 6E5-45371-01 | |
| Yamaha | 175ETL/ETX | 175 | 2-Stroke | 688-45371-02 / 6E5-45371-01 | |
| Yamaha | 200ETL/ETX | 200 | 2-Stroke | 688-45371-02 / 6E5-45371-01 | |
| Parsun | T85/T90 | 85-90 | Compatible with Yamaha 688-45371-02 |
Technical Specs
- Product Type
- Trim Tab Zinc Anode
- Installation
- Bolt-on
- Housing Material
- Zinc Alloy (meets Mil-Spec A-18001K standards)
- Housing Color
- Silver-gray (natural zinc)
- Dimensions
- 92mm diameter (3-5/8")
- Weight
- 0.45kg (1.0 lb)
- Thread Size
- M10 x 1.25mm
- Primary Function
- Sacrificial anode designed to protect outboard motors from galvanic corrosion.
What’s in the Box
- 1 x Trim Tab Zinc Anode (Replaces 688-45371-02)
Installation Notes
- Tilt the outboard to its highest position and engage the tilt lock for safety. Disconnect the engine's battery.
- Locate the existing trim tab anode on the underside of the anti-cavitation plate.
- Use a wrench to loosen and remove the central mounting bolt, then remove the old, corroded anode.
- Thoroughly clean the mounting surface on the gearcase, removing any residue, corrosion, or old paint to ensure good electrical contact.
- Position the new anode and insert the mounting bolt. Hand-tighten to ensure it is seated correctly.
- Torque the bolt to the manufacturer's specification. Do not overtighten.
- Lower the outboard and restore power by reconnecting the battery.
Troubleshooting & FAQ
How do I know if this anode fits my specific engine?
This anode fits a wide range of Yamaha models from 50HP to 200HP. The most reliable method is to check the "Engine & Model Compatibility" table and confirm that your OEM part number (from your engine's parts manual) is listed in our "Part Number Matrix." When in doubt, visually compare the photos and dimensions with your current part.
What are the signs that my old anode needs to be replaced?
You should replace your anode when it is about 50% eroded. Obvious signs include heavy pitting, crumbling, or significant material loss. A white, chalky appearance is normal, but a severely depleted anode can no longer protect your engine effectively.
How often should I change my trim tab anode?
For boats used in saltwater, we recommend inspecting anodes every 50-100 service hours or at least once a year. Boats kept in the water will experience faster anode erosion than those stored on a trailer. Frequent inspection is key.
Does this anode include the mounting bolt?
No, mounting hardware is not included. In most cases, you can reuse your existing M10 x 1.25mm bolt, provided it is in good condition.
Will this fit my 115HP Yamaha engine?
It is designed to fit specific Yamaha 115HP models, both 2-stroke and 4-stroke, that require OEM part numbers 688-45371-02 or 6E5-45371-01. As Yamaha uses different parts on different model years, always verify the part number for your specific engine serial number before ordering.
Why is the trim tab adjustable?
The trim tab anode counteracts propeller-induced torque steer. If your boat pulls to one side, you can adjust the angle of this tab to help it track straight. It serves both as a corrosion protector and a steering aid.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9001 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before ordering. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component.
- Professional installation is recommended for safety and to ensure optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world saltwater and freshwater conditions.
- Fast Global Fulfillment — With partners worldwide, we offer free standard delivery to most regions, typically arriving in 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
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