Yanmar OEM Zinc Anode Screw 27210-200300
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Yanmar 27210-200300 is a genuine OEM zinc anode screw used as an internal engine corrosion-protection part on select Yanmar marine diesel applications. It is a pencil-anode style zinc that threads into the engine or cooling-system location to help protect internal metal components from galvanic corrosion. Current references consistently describe this part as a 20 mm diameter x 30 mm zinc with M8 x 1.25 threads.
Because this is a zinc anode, it is intended for saltwater use. Internal anodes like this protect cooling passages and related metal components that are not easily visible during routine external inspection, making timely replacement important as part of regular service.
Key Features
- Genuine Yanmar OEM zinc anode screw
- OEM part number: 27210-200300
- Pencil-anode style internal corrosion-protection part
- Approx. dimensions: 20 mm diameter x 30 mm zinc length
- Thread size: M8 x 1.25
- Designed for internal engine / cooling-system sacrificial protection
Engine Compatibility
Current fitment references commonly associate 27210-200300 with select Yanmar marine diesel engines including 2GM, 2GM20, 3GM, 3GM30, 3HM, 3HM35, 2QM15, 2QM20, 3QM30, YSB8, YSB12, YSM8, and YSM12. Some current references also extend fitment to certain 6LY3-UTP / STP / ETP applications. Fitment should still be confirmed by engine model, serial number, and installed anode dimensions before ordering.
Serial Number Fitment Notice
Fitment should be verified using the Yanmar engine model and serial number, along with the installed anode’s thread size, zinc diameter, and zinc length. Matching by OEM part number 27210-200300 remains the safest method.
When This Part Needs Replacement
Replace this anode when the zinc is heavily consumed, pitted, shortened, or no longer able to provide proper sacrificial protection. Internal engine anodes are small service items, but they protect much more expensive cooling-system and engine components from corrosion damage.
Installation Notes
Install only where 27210-200300 is specified for the engine application. Confirm M8 x 1.25 thread size, zinc dimensions, and the existing installed anode before service. On engines using multiple internal anodes, each location should be checked individually during maintenance.
Alternate / Superseded Part Numbers when applicable
- 27210-200300
- CDZ 9-001
- 18-6201
Parts Desk Insight
Internal zinc anodes are easy to miss because they are hidden in the engine rather than mounted externally, but they are often some of the most important corrosion-protection parts on a raw-water-cooled diesel. Replacing a small internal zinc on schedule is far less expensive than repairing corrosion inside the cooling system later.
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
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.