Zinc Anode Kit – Fits Volvo Penta 290 DP Duo-Prop Outdrives (Replaces 875821, 852835)
Zinc Anode Kit – Fits Volvo Penta 290 DP Duo-Prop Outdrives (Replaces 875821, 852835) 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).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Zinc Anode Kit – Fits Volvo Penta 290 DP Duo-Prop Outdrives (Replac...
Product Details
This Zinc Anode Kit – Fits Volvo Penta 290 DP Duo-Prop Outdrives provides essential protection against galvanic corrosion for specific sterndrive models in saltwater environments. It is engineered to fit Volvo Penta 290 DP style outdrives, including DP-C1, DP-D1, DP-S, DP-E, and DP-G models.
The kit serves as a direct replacement for Volvo Penta part numbers 875821 (ring) and 852835 (bar), and provides an aftermarket interchange for Martyr CM290DPKITZ, Tecnoseal 20706, and Seachoice 95361.
- Features a simple bolt-on design for straightforward installation.
- Made from a high-grade zinc alloy that conforms to military specification MIL-A-18001 for reliable performance.
- Includes a complete set of anodes and required mounting hardware for a full replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Volvo Penta | 875821 |
| Volvo Penta | 852835 |
| Martyr | CM290DPKITZ |
| Martyr | CMV18Z/CM852835Z |
| Tecnoseal | 20706 |
| Seachoice | 95361 |
Engine & Model Compatibility
Confirm your engine model in the table below.
This kit is designed for the following Volvo Penta outdrive models.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo Penta | 290 DP-C1 | 875821, 852835 | Complete kit for dual propeller outdrive |
| Volvo Penta | 290 DP-D1 | 875821, 852835 | Complete kit for dual propeller outdrive |
| Volvo Penta | 290 DP-S | 875821, 852835 | Complete kit for dual propeller outdrive |
| Volvo Penta | 290 DP-E | 875821, 852835 | Complete kit for dual propeller outdrive |
| Volvo Penta | 290 DP-G | 875821, 852835 | Complete kit for dual propeller outdrive |
Technical Specs
- Product Type
- Sacrificial Zinc Anode Kit
- Installation
- Bolt-on
- Connection
- Direct bolt-on with included hardware
- Housing Material
- Zinc alloy
- Housing Color
- Silver-gray (natural zinc)
- Dimensions
- 32.5cm x 23.0cm x 4.8cm
- Weight
- 1.41 kg (3.1 lbs)
- Fitting Type
- Direct replacement
- Other Technical Attributes
- Conforms to military spec MIL-A-18001
What’s in the Box
- 1 x Volvo Penta DP 290 Outdrive Ring Zinc Anode (Replaces 875821)
- 1 x Volvo Penta 290 Outdrive Bar Zinc Anode (Replaces 852835)
- 1 x Set of Mounting Hardware
Installation Notes
- Haul the vessel out of the water to access the outdrive.
- Locate and identify the old ring and bar anodes on the Volvo Penta 290 DP outdrive.
- Unscrew and remove the old, depleted anodes. Discard the old hardware.
- Thoroughly clean the mounting surfaces on the outdrive to ensure a bare metal contact. A wire brush is effective for removing fouling and oxidation.
- Position the new bar and ring anodes onto their respective locations.
- Insert the new mounting hardware and tighten the bolts securely. Do not over-torque.
- A good mechanical and electrical connection is critical for the anode to function correctly.
Troubleshooting & FAQ
How do I know if this anode kit will fit my outdrive?
This kit is specifically designed for Volvo Penta 290 DP style outdrives, including DP-C1, DP-D1, DP-S, DP-E, and DP-G models. Please verify your outdrive model before purchasing. It replaces OEM part numbers 875821 and 852835.
Can I use this zinc anode kit in freshwater or brackish water?
Zinc anodes are specifically formulated for saltwater use. For freshwater, you should use magnesium anodes, and for brackish water, aluminum anodes are recommended for the best protection.
How often should I replace my outdrive anodes?
Anodes should be inspected at least once a year and replaced when they are 50% consumed. The rate of corrosion can vary based on water salinity, temperature, and electrical currents in the marina.
What are the signs that my old anodes are failing or need replacement?
Visible signs include significant pitting, crumbling, or the anode being worn down to half its original size. A white, chalky coating can also indicate the anode is no longer active. If you notice accelerated corrosion on other underwater metal parts, your anodes are likely depleted.
Does this kit include the necessary bolts for installation?
Yes, the kit includes a complete set of mounting hardware for both the ring and bar anodes, ensuring you have everything needed for a proper installation.
What is the difference between an OEM part and this aftermarket kit?
This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It has been engineered to meet or exceed OEM specifications using comparable high-grade materials. Our parts are made in an ISO 9002 certified facility and are batch-inspected to ensure quality and consistency.
How fast is shipping and what does it cost?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use conditions. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original packaging. Please see our full policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against your original part before ordering. If anything differs—even if your model is listed as compatible—do not purchase.
- This is an aftermarket replacement part, not an OEM component.
- Professional installation is recommended for safety and optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
Payment & Security
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