Breather Cover Gasket – Fits Yanmar 1GM, 1GM10 Series (Replaces 128170-03070)
Breather Cover Gasket – Fits Yanmar 1GM, 1GM10 Series (Replaces 128170-03070) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
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.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Breather Cover Gasket – Fits Yanmar 1GM, 1GM10 Series (Replaces 128...
Product Details
This Breather Cover Gasket – Fits Yanmar 1GM, 1GM10 Series is designed for Yanmar 1GM, 1GMY-C, and 1GM10 diesel engines. It provides a reliable seal for the breather cover, preventing oil leaks and ensuring the crankcase ventilation system functions correctly to maintain engine performance.
It serves as a direct replacement for OEM part number 128170-03070 and other aftermarket equivalents.
- Engineered for direct replacement and easy installation.
- Seals the breather cover to prevent oil leaks and contamination.
- Helps maintain proper crankcase pressure and ventilation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 128170-03070 |
| Repower Marine | RM128170-03070 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Compatible with the following Yanmar Marine diesel engines:
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yanmar | 1GM | 7.5-9 | 4-Stroke | 128170-03070 | Diesel |
| Yanmar | 1GMY-C | 9 | 4-Stroke | 128170-03070 | Diesel |
| Yanmar | 1GM10 | 9 | 4-Stroke | 128170-03070 | Diesel |
| Yanmar | 1GML | 4-Stroke | 128170-03070 | Diesel |
Technical Specs
- Product Type
- Breather Cover Gasket
- Installation
- Direct replacement
- Material
- Paper/Gasket Material
- Dimensions
- 65 mm × 50 mm × 1 mm (L × W × H)
- Weight
- 0.01 kg (0.02 lb)
- Color
- Brown/Tan
- OEM Reference
- 128170-03070
- Warranty
- Varies by seller (6 months from PalmerPower)
What’s in the Box
- 1 x Breather Cover Gasket (128170-03070)
Installation Notes
- Ensure the engine is off, cool, and disconnected from any power source before starting.
- Locate and carefully remove the breather cover, retaining all fasteners.
- Remove the old gasket completely, taking care to scrape away any hardened residue from both mating surfaces.
- Clean the surfaces of the engine block and the breather cover until they are free of oil, dirt, and old gasket material.
- Position the new gasket, ensuring it aligns perfectly with the bolt holes and sealing surfaces.
- Reinstall the breather cover and tighten the fasteners in a staggered sequence to the manufacturer's specified torque.
- After reassembly, start the engine and carefully inspect the area for any signs of oil leakage.
Troubleshooting & FAQ
How do I know if this gasket will fit my Yanmar engine?
This gasket is designed for Yanmar 1GM, 1GMY-C, and 1GM10 series engines. To ensure compatibility, verify your engine model is listed, check that the OEM part number is 128170-03070, and visually compare the gasket's shape with your existing one before installation.
What are the signs of a failing breather cover gasket?
Common signs of failure include visible oil leaks or seepage around the breather cover, an oily residue collecting on the engine block nearby, or a distinct smell of burning oil during operation.
When should this gasket be replaced?
It is best practice to replace this gasket any time the breather cover is removed for maintenance. It should also be replaced immediately if you notice any signs of leakage or material degradation.
Is any sealant required for installation?
This type of gasket is typically installed dry. Applying sealant is not usually necessary unless specified by your engine’s official service manual. Always refer to manufacturer guidelines for the definitive procedure.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
