Air Filter – Fits Yanmar 2GM, 3GM, 2YM, 3YM Series (Replaces 128270-12540, 128377-12530)
Air Filter – Fits Yanmar 2GM, 3GM, 2YM, 3YM Series (Replaces 128270-12540, 128377-12530) is backordered and will ship as soon as it is back in stock.
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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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Air Filter – Fits Yanmar 2GM, 3GM, 2YM, 3YM Series (Replaces 128270...
Product Details
This replacement Air Filter – Fits Yanmar 2GM, 3GM, 2YM, 3YM Series Marine Engines is engineered to protect your engine by preventing airborne contaminants from entering the intake system. It is designed for a broad range of Yanmar marine diesel engines, including the 2GM and 3GM series (1980–2005) as well as the 2YM and 3YM series (2004–2015).
This element serves as a direct interchange for Yanmar part numbers 128270-12540 and 128377-12530, and aftermarket reference Sierra 18-57703.
- Installation Method: Direct replacement into the OEM filter housing.
- Filter Media: Comprises a cone-shaped metal mesh core with integrated filter paper.
- Engine Fuel Type: Designed exclusively for diesel engines.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 128270-12540 |
| Yanmar | 128377-12530 |
| Sierra | 18-57703 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This air filter is designed for a wide range of Yanmar marine engines. Please verify your specific model details against the list to ensure correct fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yanmar | 2GM | 4-Stroke | 1980–1983 | 128270-12540 | |
| Yanmar | 2GMF | 4-Stroke | 1980–1983 | 128270-12540 | |
| Yanmar | 2GM20 | 4-Stroke | 1983–2005 | 128270-12540 | |
| Yanmar | 2GM20F | 4-Stroke | 1983–2005 | 128270-12540 | |
| Yanmar | 2GM20-YEU | 4-Stroke | 128270-12540 | ||
| Yanmar | 2GM20F-YEU | 4-Stroke | 128270-12540 | ||
| Yanmar | 2YM15 | 15 | 4-Stroke | 2004–2015 | 128270-12540 |
| Yanmar | 2YM15C | 15 | 4-Stroke | 128270-12540 | |
| Yanmar | 3GM | 4-Stroke | 1980–1983 | 128270-12540 | |
| Yanmar | 3GMD | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GMF | 4-Stroke | 1980–1983 | 128270-12540 | |
| Yanmar | 3GM30 | 4-Stroke | 1983–2015 | 128270-12540 | |
| Yanmar | 3GM30B | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GM30C | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GM30F | 4-Stroke | 1983–2005 | 128270-12540 | |
| Yanmar | 3GM30FV | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GM30FVE | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GM30V | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GM30VE | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GMFLE | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GMFY | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GMFY-E | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GMFYE-E | 4-Stroke | 128270-12540 | ||
| Yanmar | 3GMLE | 4-Stroke | 128270-12540 | ||
| Yanmar | 3YM20 | 20 | 4-Stroke | 2004–2015 | 128270-12540 |
| Yanmar | 3YM27A | 4-Stroke | 128270-12540 | ||
| Yanmar | 3YM30 | 30 | 4-Stroke | 2004–2015 | 128270-12540 |
| Yanmar | 3YM30AE | 4-Stroke | 128270-12540 | ||
| Yanmar | 3YM30R | 4-Stroke | 128270-12540 |
Technical Specs
- Product Type
- Air Filter Element
- Installation
- Direct replacement
- Fuel Type
- Diesel
- Connection
- Cone-shaped with inner metal core
- Housing Material
- Metal mesh with filter paper
- Dimensions
- Approximately 107mm OD × 98mm ID × 77mm H (4.21" × 3.86" × 3.03")
- Weight
- Approximately 50g (0.11 lb)
- Fitting Type
- Conical element for OEM filter housing
- Outer Diameter
- 84mm (3.3")
- Inner Diameter
- 68mm (2.68")
- Warranty
- Varies by seller (typically 30-day replacement)
What’s in the Box
- 1 x Air Filter Element (Replaces 128270-12540 / 128377-12530)
Installation Notes
- Ensure the engine is turned off and completely cool before starting.
- Locate the air filter housing. It is typically a black plastic or metal box connected to the engine's air intake.
- Open the air filter housing cover. This may involve releasing clips, wing nuts, or screws.
- Carefully remove the old air filter element, paying attention to its orientation.
- Wipe the inside of the filter housing clean with a cloth to remove any dust or debris.
- Install the new air filter element, ensuring it is seated correctly and forms a tight seal.
- Replace the housing cover and securely fasten it.
Troubleshooting & FAQ
How do I know if this air filter will fit my engine?
This filter is designed for Yanmar 2GM, 3GM, 2YM, and 3YM series engines. Please review the detailed compatibility table on this page and compare your engine model and year. It directly replaces OEM parts 128270-12540 and 128377-12530. Comparing the dimensions to your existing filter is also a reliable confirmation method.
What are the signs of a clogged or failing air filter?
Common symptoms include a noticeable decrease in engine power, increased black smoke from the exhaust, higher than normal fuel consumption, or the engine struggling to reach full RPM. A visual inspection will show dirt, oil, or damage to the filter media.
How often should I replace my engine's air filter?
The replacement interval depends on your engine's hours and operating environment (e.g., dusty or salty air). Refer to your Yanmar service manual for official recommendations. As a best practice, inspect the filter every 100–200 hours of operation and replace it annually or whenever it appears dirty or damaged.
Is any modification needed for installation?
No. This is a direct-fit aftermarket part designed to install into the original factory air filter housing without any modifications.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
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 (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs 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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