Aftermarket Air Filter Element for Yanmar 2GM, 3GM30, 3YM20 & 3YM30 Engines – Replaces 128270-12540, Sierra 18-57703
Aftermarket Air Filter Element for Yanmar 2GM, 3GM30, 3YM20 & 3YM30 Engines – Replaces 128270-12540, Sierra 18-57703 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Aftermarket Air Filter Element for Yanmar 2GM, 3GM30, 3YM20 & 3...
Aftermarket Air Filter Element for Yanmar 2GM, 3GM30, 3YM20 & 3YM30 Engines – Replaces 128270-12540, Sierra 18-57703 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket air filter element is designed for selected Yanmar Marine Inboard engines, including the 2GM, 2GM20F, 3GM30, 3YM20 and 3YM30 applications listed below. It replaces Yanmar OEM part number 128270-12540 and is also cross-referenced to Sierra 18-57703.
Use the exact engine designation and replacement part number to confirm compatibility before ordering. Model suffixes and application conditions must match the fitment information for your engine.
- Replacement air filter element for selected Yanmar marine diesel engines.
- Designed as a direct replacement for the specified original air filter application.
- Sold as one air filter element.
Part Number Matrix
The following references are associated with this air filter application.
| Brand | Part Number | Reference Type |
|---|---|---|
| Yanmar | 128270-12540 | OEM replacement reference |
| Sierra | 18-57703 | Aftermarket cross-reference |
Engine & Model Compatibility
Compatibility is limited to the Yanmar applications listed below. Confirm the complete model designation and compare the part number on your existing filter or engine documentation before installation.
| Brand | Engine Model or Application | OEM Part No. |
|---|---|---|
| Yanmar | 2GM, LP, SZK | 128270-12540 |
| Yanmar | 2GM20F, F-YEU, -YEU | 128270-12540 |
| Yanmar | 3GM30, F, F-YEU | 128270-12540 |
| Yanmar | 3YM20 | 128270-12540 |
| Yanmar | 3YM30, AE | 128270-12540 |
Technical Specs
- Product Type
- Air filter element
- Application
- Selected Yanmar Marine Inboard engines
- OEM Replacement Reference
- Yanmar 128270-12540
- Aftermarket Cross-Reference
- Sierra 18-57703
- Installation
- Replacement air filter element for the specified application
What’s in the Box
- 1 x aftermarket air filter element
Installation Notes
- Turn the engine off and allow it to cool before beginning work.
- Locate the engine air filter housing and remove the cover according to the engine service instructions.
- Remove the existing air filter element and note its orientation.
- Clean loose dust and debris from the housing without allowing contaminants to enter the intake.
- Install the replacement element in the same orientation, making sure it is fully seated.
- Reinstall and secure the housing cover before operating the engine.
Troubleshooting & FAQ
Which engines does this air filter fit?
This element is listed for selected Yanmar applications: 2GM, LP and SZK; 2GM20F, F-YEU and -YEU; 3GM30, F and F-YEU; 3YM20; and 3YM30, AE. Confirm the complete model designation and OEM reference before ordering.
What part number does this element replace?
This aftermarket element replaces Yanmar OEM part number 128270-12540. Sierra 18-57703 is the associated aftermarket cross-reference.
Is this an OEM Yanmar part?
No. This listing is for an aftermarket replacement air filter element. Yanmar 128270-12540 is provided as the OEM replacement reference.
How can I confirm compatibility?
Compare your engine’s complete model and suffix with the compatibility table, then verify that your existing filter or service documentation identifies Yanmar 128270-12540. Do not rely on the engine family name alone.
When should the air filter be replaced?
Inspect and replace the element according to the maintenance schedule for your engine. Replace it sooner if it is damaged or excessively contaminated. Follow the instructions in the applicable Yanmar service manual.
Safety & Important Info
- Verify the complete engine model, suffix and replacement part number before purchase.
- This is an aftermarket replacement, not an OEM Yanmar component.
- Install the element securely and ensure the air filter housing is properly closed before operating the engine.
- If your original element or application differs from the information shown, confirm fitment with the engine manufacturer’s service documentation.
About Sea Sierra
- Marine Replacement Parts — Replacement components for marine engine maintenance and repair.
- Application-Focused Listings — Product references and fitment information are provided to help match the correct replacement part.
- Support When Needed — Contact customer support if you need help comparing the listed application with your engine documentation.
Payment & Security
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