Air Filter Element for Yanmar 2GM and 3GM30 Marine Engines — Replaces 128270-12540
Air Filter Element for Yanmar 2GM and 3GM30 Marine Engines — Replaces 128270-12540 is backordered and will ship as soon as it is back in stock.
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Air Filter Element for Yanmar 2GM and 3GM30 Marine Engines — Replac...
Air Filter Element for Yanmar 2GM and 3GM30 Marine Engines — Replaces 128270-12540 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. It replaces Yanmar OEM part number 128270-12540 and is listed as the aftermarket equivalent Sierra 18-57703.
The company fitment record lists this air filter for Yanmar 2GM, LP, SZK, 2GM20F, F-YEU, -YEU, 3GM30, F, F-YEU, 3YM20, and 3YM30 AE applications. Confirm the model designation and the part number on your existing filter before ordering.
- Air filter element for Yanmar marine inboard applications.
- Direct replacement for the specified original filter reference.
- Helps clean intake air before it enters the engine.
- Single replacement filter element; this listing is not a kit.
Part Number Matrix
Use these verified product references to compare your existing filter.
| Brand | Reference | Type |
|---|---|---|
| Yanmar | 128270-12540 | OEM reference |
| Sierra | 18-57703 | Aftermarket reference |
Engine & Model Compatibility
The following applications are listed for this air filter element. Model suffixes and installation details can vary, so compare your original part before installation.
| Brand | Listed model or designation | Reference |
|---|---|---|
| Yanmar | 2GM | 128270-12540 |
| Yanmar | LP | 128270-12540 |
| Yanmar | 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 Specifications
- Product Type
- Air filter element
- Application
- Yanmar Marine Inboard engines
- Installation
- Replacement air filter element; compare the original element and housing before installation
- OEM Reference
- Yanmar 128270-12540
- Aftermarket Reference
- Sierra 18-57703
- Quantity
- One air filter element
What’s in the Box
- 1 × aftermarket air filter element
Installation Notes
- Turn off the engine and allow it to cool completely before servicing the air intake.
- Locate the air filter housing or intake silencer and remove its cover according to the engine service instructions.
- Remove the old filter element carefully so dirt does not enter the intake.
- Clean loose dust and debris from the housing without allowing contaminants into the engine.
- Install the replacement element in the same orientation as the original and ensure it is seated correctly.
- Refit and secure the housing cover before starting the engine.
Maintenance & FAQ
Which Yanmar engines are listed for this filter?
The company fitment record lists Yanmar 2GM, LP, SZK, 2GM20F, F-YEU, -YEU, 3GM30, F, F-YEU, 3YM20, and 3YM30 AE applications. Check the exact model marking and the original filter reference before ordering.
What part number does this filter replace?
This aftermarket air filter element replaces Yanmar OEM reference 128270-12540. Sierra 18-57703 is the listed aftermarket reference.
Is this a complete air intake assembly?
No. This listing is for one replacement air filter element only. The housing, intake silencer, cover, fasteners, and other engine components are not included.
How do I know when to replace the filter?
Inspect the element during routine engine maintenance and replace it if it is heavily soiled, damaged, distorted, or no longer seats securely in the housing. Follow the maintenance interval in your engine service documentation where available.
Is this an OEM Yanmar part?
No. This is an aftermarket replacement for Yanmar reference 128270-12540. Yanmar and Sierra part numbers are provided only as reference identifiers.
Safety & Important Information
- Verify the engine model, filter housing, dimensions, and reference number against your original part before purchase.
- Do not operate the engine without the air filter and housing correctly installed.
- Use the engine manufacturer's service instructions for maintenance and installation requirements.
- This listing is for a single aftermarket filter element, not a kit or complete filter housing.
About Sea Sierra
- Marine replacement parts selected for common service and repair applications.
- Clear reference-number and fitment information to support part identification.
- Practical replacement components for routine marine engine maintenance.
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