Air Filter for Yanmar 2GM and 3GM30 Marine Diesel Engines – Replaces 128270-12540
Air Filter for Yanmar 2GM and 3GM30 Marine Diesel Engines – Replaces 128270-12540 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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Air Filter for Yanmar 2GM and 3GM30 Marine Diesel Engines – Replace...
Air Filter for Yanmar 2GM and 3GM30 Marine Diesel 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 intended for selected Yanmar marine diesel engines, including the 2GM and 3GM30. It replaces Yanmar OEM part number 128270-12540 and is designed for installation in the original filter housing.
The verified aftermarket reference for this replacement is Sierra 18-57703. Always compare your original filter, engine model and housing before ordering, especially where model variants or replacement housings are involved.
- Product type: Air filter element
- Application: Yanmar marine diesel engines
- Installation: Replacement in the original air-filter housing
- Fuel type: Diesel
Part Number Matrix
These are the verified reference numbers associated with this replacement air filter.
| Brand | Part Number | Role |
|---|---|---|
| Yanmar | 128270-12540 | OEM replacement reference |
| Sierra | 18-57703 | Aftermarket reference |
Engine & Model Compatibility
The available catalog fitment identifies this air filter for the following Yanmar engine applications. Confirm the exact model designation and filter housing before installation.
| Brand | Engine Model | Stroke | OEM Replacement Reference |
|---|---|---|---|
| Yanmar | 2GM | 4-Stroke | 128270-12540 |
| Yanmar | 3GM30 | 4-Stroke | 128270-12540 |
Technical Specs
- Product Type
- Air filter element
- Application
- Yanmar 2GM and 3GM30 marine diesel engines
- Installation
- Replacement in the original air-filter housing
- Fuel Type
- Diesel
- Replacement Reference
- Yanmar 128270-12540
- Aftermarket Reference
- Sierra 18-57703
What’s in the Box
- 1 x Air filter element
Installation Notes
- Turn off the engine and allow it to cool before beginning work.
- Locate the engine air-filter housing and remove its cover according to the engine service instructions.
- Remove the existing filter element, noting its orientation and seating position.
- Clean loose dust and debris from the housing without allowing contaminants to enter the intake.
- Install the replacement element in the same orientation and ensure it is seated correctly.
- Refit and secure the housing cover before operating the engine.
Troubleshooting & FAQ
How do I confirm that this air filter fits my engine?
Confirm that your engine is a Yanmar 2GM or 3GM30 and that the existing filter or engine documentation identifies Yanmar replacement reference 128270-12540. Compare the original filter and housing before ordering. If your engine is a different Yanmar model, do not assume fitment from the engine family name alone.
What are the signs of a dirty or restricted air filter?
Possible symptoms include reduced engine performance, black exhaust smoke, increased fuel consumption or difficulty reaching normal operating speed. Inspect the filter for dirt, oil contamination or damage and follow the engine manufacturer's maintenance guidance.
How often should the filter be replaced?
Replacement frequency depends on operating hours and the surrounding environment. Inspect the filter at the intervals specified in your engine service manual and replace it when dirty, damaged or restricted.
Is modification required?
This replacement is intended for the original air-filter housing associated with the stated application. No modification should be required when the engine model, reference number and housing match; do not force a filter that does not seat correctly.
Is this an OEM part?
No. This is an aftermarket replacement air filter element. Yanmar 128270-12540 is provided as the OEM replacement reference, and Sierra 18-57703 is the verified aftermarket reference.
Shipping speed and cost
Available shipping methods, delivery estimates and costs are shown at checkout and may vary by destination.
Warranty and returns
Warranty coverage and return eligibility are subject to the seller's current policies. Contact support before returning an item and provide your order details.
Safety & Important Info
- Verify the engine model, existing filter and housing before purchase.
- Do not operate the engine with the filter incorrectly seated or the housing cover unsecured.
- This is an aftermarket replacement, not an OEM component.
- Follow the engine manufacturer's service and safety instructions during installation.
About Sea Sierra
- Marine Parts Focus — Replacement components selected for common marine service applications.
- Application Information — Product references and fitment details are provided to help with part identification.
- Customer Support — Contact support if you need help confirming a reference or return procedure.
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