Magnesium Anode Kit for Volvo Penta SX/DP-SM Drives – Fits Freshwater Applications
Magnesium Anode Kit for Volvo Penta SX/DP-SM Drives – Fits Freshwater Applications is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Magnesium Anode Kit for Volvo Penta SX/DP-SM Drives – Fits Freshwat...
Product Details
This Magnesium Anode Kit for Volvo Penta SX/DP-SM Drives is engineered for complete corrosion protection in freshwater environments. It is designed to fit a wide range of Volvo Penta SX and DP-SM sterndrive models, providing a reliable defense against galvanic corrosion for your gearcase and transom shield.
The kit serves as a direct replacement for Tecnoseal TENKITVOLVOSX-MG, Martyr CMSXKITMG, and BoatZincs SX-Kit-MG, ensuring full interchangeability.
- Designed specifically for use in freshwater applications.
- Provides a complete solution with anodes for both the gearhouse and transom.
- Features a direct bolt-on design with all necessary mounting hardware included for straightforward installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 3855411 | Gearhouse/Outdrive Anode |
| Volvo Penta | 3854130 | Transom Shield Anode |
| Tecnoseal | TENKITVOLVOSX-MG | Aftermarket Equivalent |
| Martyr | CMSXKITMG | Aftermarket Equivalent |
| BoatZincs | SX-Kit-MG | Aftermarket Equivalent |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is compatible with the following Volvo Penta sterndrive models.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo Penta | SX | 3855411, 3854130 | Gearcase and transom shield anodes |
| Volvo Penta | SX-M, SX-M1 | 3855411, 3854130 | Includes variants 1.43, 1.51, 1.60, 1.66, 1.79, 1.89, 1.97, 2.18 |
| Volvo Penta | SX-MLT, SX-MDA, SX-MDB, SX-MHP, SX-MACLT, SX-MDC, SX-MBAC | 3855411, 3854130 | |
| Volvo Penta | SX-C, SX-C1, SX-C2, SX-CT, SX-CT1, SX-R, SX-RT1, SX-RT2 | 3855411, 3854130 | |
| Volvo Penta | DP-S, DP-S1, SX-C1AC, SX-C2AC, SX-R1, SX-R2, SX-CLT, SX-CLT1 | 3855411, 3854130 | |
| Volvo Penta | DP-SM | 3855411, 3854130 |
Technical Specs
- Product Type
- Magnesium Anode Kit
- Application
- Freshwater environments
- Material
- Magnesium
- Installation
- Direct bolt-on replacement
- Weight
- 0.71 kg (1.57 lb)
- Product Dimensions
- 32.5 cm L x 22.5 cm W x 5.0 cm H
- Other Technical Attributes
- Complete kit with mounting hardware
What’s in the Box
- 1 x Gearhouse/Outdrive Anode (Replaces 3855411)
- 1 x Transom Shield Anode (Replaces 3854130)
- 1 x Set of Mounting Hardware
Installation Notes
- Disconnect the battery or main power supply to the sterndrive before beginning work.
- Locate and unbolt the old anodes from the gearcase and transom assembly. You may need to clean away marine growth to access them.
- Thoroughly clean the mounting surfaces on the sterndrive. A wire brush or sandpaper is effective for removing any corrosion or residue.
- Ensure a clean, bare metal-to-metal connection. This is critical for the anode to function correctly.
- Securely fasten the new anodes using the included hardware. Do not overtighten the bolts.
- Reconnect the battery and verify all systems are operational.
Troubleshooting & FAQ
Will this kit fit my specific Volvo Penta model?
This kit is designed for Volvo Penta SX and DP-SM series sterndrives used in freshwater. Please review the compatibility table to confirm your specific model is listed before purchasing.
Can I use this magnesium kit in saltwater?
No. This kit is made of magnesium, which is specifically for freshwater use. Using it in salt or brackish water will cause it to corrode too quickly. For salt or brackish water, an aluminum anode kit is recommended.
How often should I replace these anodes?
Anodes should be inspected at least every six months and replaced when they are approximately 50% consumed. Replacement intervals can vary significantly based on water conditions and electrical activity.
What are the signs of a worn or failing anode?
Aside from visible pitting or erosion of the anode itself, a key sign of failure is the appearance of new galvanic corrosion on other underwater metal parts of your sterndrive, like the propeller or housing.
Why does the kit include two different anodes?
This is a complete protection kit for the sterndrive unit. One anode protects the main gearcase/outdrive housing, while the other protects the transom shield assembly, ensuring all major underwater components are shielded from corrosion.
Is it okay to paint the anodes?
No, never paint an anode. Paint will insulate the anode, preventing it from making electrical contact with the water and rendering it useless for corrosion protection.
Is this an OEM part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch-inspections for consistency.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
This product is 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 for unused items in original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and 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.
Payment & Security
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