Yanmar OEM Internal Engine Anode 120650-18530
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You have 30 days to request a return. All sale items are final sale.
Genuine OEM Yanmar sacrificial anode (part number 120650-18530) designed to protect your engine's cooling system from galvanic corrosion. This factory-spec zinc or magnesium anode sacrifices itself to prevent corrosion damage to expensive engine components, extending the life of your heat exchanger, oil cooler, and other cooling system parts.
Key Features:
- Genuine Yanmar OEM part - exact fit and performance
- Part Number: 120650-18530
- Sacrificial metal protects critical engine components
- Prevents galvanic corrosion in cooling system
- Extends life of heat exchangers and coolers
- Essential corrosion protection for marine engines
- Direct replacement for routine maintenance
How Sacrificial Anodes Work:
In marine environments, dissimilar metals in contact with seawater create galvanic corrosion that can destroy expensive engine components. Sacrificial anodes are made from metals that corrode preferentially, protecting more valuable parts like bronze heat exchangers, aluminum housings, and steel components. As the anode corrodes, it prevents corrosion of critical engine parts.
Maintenance Schedule:
Inspect anodes regularly and replace when 50% depleted. Yanmar recommends checking anodes at each oil change and replacing them at least annually, or more frequently in saltwater applications. Never allow anodes to corrode completely, as this leaves your engine unprotected. Anodes that appear painted, coated, or discolored may not be functioning properly and should be replaced.
Installation Tips:
Ensure the anode makes good electrical contact with the engine block or component it's protecting. Clean the mounting threads and surface before installation. Do not use thread sealant or anti-seize compounds that could insulate the anode. Torque to manufacturer specifications - overtightening can damage threads, while undertightening prevents proper electrical contact.
Saltwater vs. Freshwater:
Different anode materials are used for saltwater (zinc) versus freshwater (magnesium) applications. Verify you're using the correct anode type for your operating environment. Using the wrong anode material can result in rapid depletion or ineffective corrosion protection.
Compatibility:
Verify this part number matches your engine's requirements before ordering. Consult your Yanmar engine manual or parts diagram for your specific model, or contact technical support if you need assistance confirming compatibility.
Protect your Yanmar diesel investment with this genuine OEM sacrificial anode. Inexpensive insurance against costly corrosion damage - keep spares on board for regular replacement.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.