Oil Pump Gasket – Fits Yanmar 1GM Series Marine Engines (Replaces 128170-32030)
Oil Pump Gasket – Fits Yanmar 1GM Series Marine Engines (Replaces 128170-32030) 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.).
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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Oil Pump Gasket – Fits Yanmar 1GM Series Marine Engines (Replaces 1...
Product Details
This high-quality Oil Pump Gasket is engineered to fit Yanmar 1GM series single-cylinder marine diesel engines (7.5–9 HP) manufactured between 1980 and 1983. It ensures a direct-fit replacement, restoring a reliable seal to prevent oil leaks and maintain proper engine function.
It serves as a direct interchange for Yanmar part numbers 128170-32030 and 128170-01750.
- Installation: Direct fit for specified models.
- Application: Formulated for marine diesel engine environments.
- Inclusions: Includes the gasket required for oil pump service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket standards.
| Brand | Part Number | Notes |
|---|---|---|
| Yanmar | 128170-32030 | Primary OEM |
| Yanmar | 128170-01750 | Superseded/Alternative Number |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
This part is designed for the following Yanmar marine engines:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yanmar | 1GM | 7.5 | 4-Stroke | 1980–1983 | 128170-32030 | Also known as 128170-01750 |
| Yanmar | 1GM10 | 9 | 4-Stroke | 1981–1996 | 128170-32030 | Also known as 128170-01750 |
| Yanmar | 1GM10C | 9 | 4-Stroke | 1981–1996 | 128170-32030 | |
| Yanmar | 1GM10L | 9 | 4-Stroke | 1981–1996 | 128170-32030 | |
| Yanmar | 1GM10VE | 9 | 4-Stroke | 1981–1996 | 128170-32030 | |
| Yanmar | 1GM10(YMI) | 9 | 4-Stroke | 1981–1996 | 128170-32030 | |
| Yanmar | 1GM Y-C | 7.5 | 4-Stroke | 1980–1983 | 128170-32030 | |
| Yanmar | 1GM L | 7.5 | 4-Stroke | 1980–1983 | 128170-32030 |
Technical Specs
- Product Type
- Oil Pump Gasket
- Installation
- Direct fit
- Fuel Type
- Diesel
- Dimensions
- 0.1" H x 5.5" W x 5.0" L
- Weight
- 0.01 kg (0.022 lb)
- Warranty
- 6 months
- Other Technical Attributes
- Designed for marine applications
What’s in the Box
- 1 x Oil Pump Gasket (Replaces 128170-32030/128170-01750)
Installation Notes
- Ensure the engine is completely cool and disconnect the battery terminals.
- Drain the engine oil completely into a suitable container.
- Locate the oil pump assembly and carefully remove the mounting bolts. Note their positions if they differ in length.
- Gently detach the oil pump from the engine block. You may need to lightly tap it to break the seal.
- Remove the old gasket. Scrape away any residual gasket material from both the engine block and the oil pump mating surfaces. Ensure surfaces are clean, dry, and free of oil or debris.
- Position the new gasket correctly onto the engine block or pump.
- Reinstall the oil pump, tightening the bolts in a cross pattern to the manufacturer's recommended torque specification.
- Refill the engine with the correct grade and amount of oil, then reconnect the battery.
- Start the engine and carefully inspect the oil pump area for any signs of leaks.
Troubleshooting & FAQ
How can I confirm this gasket is correct for my engine?
Please review the Engine & Model Compatibility table on this page. Match your Yanmar engine model and year range. Comparing the part number (128170-32030 or 128170-01750) to your service manual is the best way to guarantee a match.
What are the common signs of a failed oil pump gasket?
The most common symptom is a visible oil leak from the area where the oil pump meets the engine block. Other signs can include a low oil pressure warning, an unusually high engine operating temperature, or the smell of burning oil.
Should I use sealant with this gasket?
In most cases, this gasket is designed to be installed dry without any additional sealant. However, always consult your engine's official service manual for specific instructions, as some applications may have unique requirements.
How often does the oil pump gasket need to be replaced?
There is no fixed replacement interval. The gasket should be replaced anytime the oil pump is removed for service, or if you detect an oil leak from the pump mounting area.
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.
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