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Aluminum Trim Tab Anode – Fits Mercury/Mariner Outboards 35HP+ & MerCruiser Alpha One (Replaces 822777A1, 46399A1)
- $25.50
$30.00- $25.50
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Aluminum Trim Tab Anode – Fits Mercury/Mariner 35HP+ & MerCruiser Alpha One
This aluminum trim tab anode is designed for a wide range of Mercury/Mariner outboards (35 HP and up, 1994–present), MerCruiser Alpha One SS and SSM series stern drives (1985–1990), and Force 90/120 HP outboards (1995 and up). It serves as a direct replacement for several common OEM and aftermarket part numbers, providing essential protection against galvanic corrosion in both fresh and salt water environments.
Engineered from a specialized aluminum alloy, this anode offers longer-lasting protection than traditional zinc anodes, particularly in brackish or fresh water. It features a straightforward bolt-on design for easy installation.
- Application: Suitable for both fresh and salt water.
- Installation Method: Single bolt-on mount.
- Included Hardware: Comes with the required mounting bolt.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury | 822777A1 |
| Mercury | 46399A1 |
| Mercury | 822777Q1 |
| Sierra | 18-6014A |
| GLM | 12680 |
| Tecnoseal | 00804AL |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
Mercury/Mariner & Force Outboards
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | 225 (3.0L Carb) | 225 | 2-Stroke | 1994-1998 | 822777A1/822777Q1 | S/N 0D280813 thru 0G760299 |
| Mercury | 225 (3.0L Carb) | 225 | 2-Stroke | 1999-2001 | 822777A1/822777Q1 | S/N 0G760300 thru 0T408999 |
| Mercury | 225 Marathon (3.0L Carb) | 225 | 2-Stroke | 1994-1995 | 822777A1/822777Q1 | S/N 0G245605 thru 0G760299 |
| Mercury | 225 SeaPro (3.0L Carb) | 225 | 2-Stroke | 1994-1998 | 822777A1/822777Q1 | S/N 0G245605 thru 0G760299 |
| Mercury | Most outboard models | 35+ | 2-Stroke & 4-Stroke | 1995-Present | 46399A1/46399A2 | For models requiring high-rake propeller clearance |
| Force | 90/120 | 90/120 | 2-Stroke | 1995 and up | 46399A1 |
MerCruiser Stern Drives
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | Alpha One SS | Various | 4-Stroke | 1986-1989 | 46399A1 | |
| MerCruiser | SSM II/III/IV/V | Various | 4-Stroke | 1985-1990 | 46399A1 | |
| MerCruiser | All stern drive models | Various | 4-Stroke | 1985-Present | 46399A1/822777A1 | For applications requiring high-rake propeller clearance |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Aluminum Trim Tab Anode |
| Installation | Bolt-on |
| Material | Aluminum Alloy |
| Application | Fresh water and salt water |
| Connection | Single bolt mount, 7/16"-14 thread |
| Dimensions | 3-1/2" diameter × 3-1/2" height (89 mm × 89 mm) |
| Weight | 1.0 lb (0.45 kg) |
| Thread Size | 7/16"-14 |
| Other Technical Attributes | Provides longer-lasting protection than zinc anodes in brackish or fresh water |
Package Contents
- 1 x Aluminum Trim Tab Anode (Replaces 822777A1/46399A1)
- 1 x Mounting Bolt (7/16"-14)
Installation Guide
Follow these steps for proper installation. Ensure the engine is off and the battery is disconnected before starting.
- Safety First: Turn off the engine and disconnect the boat's battery power.
- Locate and Remove Old Anode: Identify the existing trim tab anode on the lower unit. Use a socket wrench to remove the central mounting bolt. The old anode may be difficult to remove if heavily corroded.
- Clean Mounting Surface: Once the old anode is off, thoroughly clean the mounting surface on the gearcase. Ensure a clean, bare metal-to-metal connection for proper electrical continuity.
- Install New Anode: Position the new aluminum anode onto the mounting surface.
- Secure the Bolt: Insert the new mounting bolt and tighten it securely according to the manufacturer's torque specifications. Do not over-tighten.
- Final Check: Confirm the anode is firmly in place and does not wobble. Reconnect the battery.
Troubleshooting & FAQ
Q: How do I confirm this anode fits my engine?
A: First, check the "Part Number Cross-Reference" table to see if your existing part number is listed. Next, review the "Compatible Engine Models" tables to find your specific engine model, year, and serial number range. Verifying both is the best way to ensure correct fitment.
Q: How often should I inspect or replace my trim tab anode?
A: It is recommended to inspect all anodes at least once a year, or more frequently if you operate in aggressive salt or brackish water. Replace the anode when it is 50% corroded to ensure your engine remains protected.
Q: What is the advantage of an aluminum anode over a zinc anode?
A: Aluminum anodes are more active than zinc, providing superior protection in a wider range of water conditions, especially in fresh and brackish water where zinc can become passivated (form a coating and stop working). This anode is suitable for both fresh and salt water use.
Q: What are signs that my old anode has failed?
A: A working anode will show signs of corrosion and pitting over time—this is normal. However, if you notice rapid or uneven corrosion on your sterndrive or outboard's lower unit, it means the anode is no longer providing protection and must be replaced immediately.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
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