Trim Tab Anode – Fits Yamaha 40HP 50HP 55HP 60HP 70HP 75HP 80HP 85HP 90HP 100HP 115HP 130HP (Replaces 6H1-45251-02, 6H1-45251-03, 18-6091)

Product Details

This Trim Tab Anode is engineered to fit Yamaha outboard engines from 40HP through 130HP. Designed as a sacrificial anode, it protects the trim tab from galvanic corrosion while providing hydrodynamic trimming power to aid steering and performance on outboards and sterndrives.

This aftermarket replacement directly interchanges with Yamaha 6H1-45251-02, 6H1-45251-03, Sierra 18-6091, Tecnoseal 01115, CMP CM6H14525102Z, and GLM 12884.

• Constructed from aluminum alloy for reliable sacrificial protection
• Complete installation kit includes trim tab anode, bolts, and washers
• Compatible across a wide range of Yamaha outboard models

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Material

Aluminum alloy

Function

Sacrificial anode for corrosion protection and hydrodynamic trimming

Application

Outboard and sterndrive trim tabs

What's in the Box

• 1× aluminum alloy trim tab anode
• 2× bolts
• 2× washers

Installation Notes

1. Disconnect the battery and ensure the engine is off before beginning installation.
2. Remove the old trim tab anode by loosening and removing the existing bolts and washers.
3. Clean the mounting surface on the trim tab to ensure proper metal-to-metal contact for galvanic protection.
4. Position the new trim tab anode on the mounting surface, aligning the bolt holes.
5. Insert the provided washers and bolts, then tighten securely but do not overtighten to avoid thread damage.
6. Reconnect the battery and perform a visual inspection to confirm secure installation.
7. Inspect the anode regularly for corrosion; replace when 50% or more of the material has eroded.

Troubleshooting & FAQ

How often should I replace the trim tab anode?

Inspect the anode every 3–6 months depending on water conditions. Replace when approximately 50% of the anode material has corroded to maintain effective galvanic protection.

Will this anode fit my specific Yamaha model year?

This trim tab anode is compatible with Yamaha outboards from 40HP to 130HP across multiple model years. Verify your engine's part number against the Part Number Matrix to confirm fitment.

Can I use this anode in both freshwater and saltwater?

Yes, aluminum alloy anodes are suitable for both freshwater and saltwater environments. They provide reliable sacrificial protection across varying salinity levels.

What are signs that my trim tab anode needs replacement?

Visible erosion, pitting, or loss of more than half the anode's original material indicates it's time to replace. Increased corrosion on the trim tab itself may also signal a depleted anode.

Do I need to apply any coating or paint to the anode?

No. The anode must remain bare metal to function properly. Paint or coatings will prevent galvanic protection and render the anode ineffective.

Why is proper metal-to-metal contact important during installation?

Direct contact between the anode and the trim tab surface ensures effective electrical conductivity, which is essential for the sacrificial anode to protect against corrosion.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 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/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
• This is an aftermarket replacement, not an OEM component.
• Professional installation is recommended for safety and performance.

About Sea Sierra

• Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
• Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
• Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.