Oil Pan Gasket – Fits Yanmar Marine Diesel Engines (Replaces 121000-01751, 121450-01751)
Oil Pan Gasket – Fits Yanmar Marine Diesel Engines (Replaces 121000-01751, 121450-01751) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Oil Pan Gasket – Fits Yanmar Marine Diesel Engines (Replaces 121000...
Product Details
This is a genuine Oil Pan Gasket for Yanmar marine diesel engines, designed to create a reliable, leak-free seal between the oil pan and the engine block. It is a crucial component for maintaining engine integrity and preventing oil leaks in a wide range of Yanmar F-series, YM-series, and GM-series engines.
This part is a direct replacement for Yanmar OEM part numbers 121000-01751 and 121450-01751.
- Engineered for direct replacement installation.
- Built to withstand the harsh marine environment.
- Includes one oil pan gasket per package.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 121000-01751 |
| Yanmar | 121450-01751 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is designed for a variety of Yanmar marine diesel engines. Please verify your specific model is listed.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yanmar | F14 | 121000-01751/121450-01751 | ||||
| Yanmar | F15 | 121000-01751/121450-01751 | ||||
| Yanmar | F16 | 121000-01751/121450-01751 | ||||
| Yanmar | YM169 | 121000-01751/121450-01751 | ||||
| Yanmar | YM180 | 121000-01751/121450-01751 | ||||
| Yanmar | YM186 | 121000-01751/121450-01751 | ||||
| Yanmar | YM187 | 121000-01751/121450-01751 | ||||
| Yanmar | YM1401 | 121000-01751/121450-01751 | ||||
| Yanmar | YM1502 | 121000-01751/121450-01751 | ||||
| Yanmar | YM1510 | 121000-01751/121450-01751 | ||||
| Yanmar | YM1601 | 121000-01751/121450-01751 | ||||
| Yanmar | YM1602 | 121000-01751/121450-01751 | ||||
| Yanmar | YM1610 | 121000-01751/121450-01751 | ||||
| Yanmar | YM1702 | 121000-01751/121450-01751 | ||||
| Yanmar | 3GM | 121000-01751 | ||||
| Yanmar | 3GM30 | 121000-01751 | ||||
| Yanmar | 3GM30F | 121000-01751 | ||||
| Yanmar | 3GMF | 121000-01751 |
Technical Specs
- Product Type
- Oil Pan Gasket
- Installation
- Direct Replacement
- Material
- Durable Gasket Material
- Dimensions
- 28" × 20" × 0.1" (711.2 mm × 508 mm × 2.54 mm)
- Application
- Marine Diesel Engines
- OEM Compatibility
- Yanmar
- Warranty
- Standard Manufacturer Warranty
What’s in the Box
- 1 × Oil Pan Gasket (121000-01751/121450-01751)
Installation Notes
- Ensure the engine is cool, and disconnect the battery. Safely drain the engine oil.
- Remove the fasteners securing the oil pan to the engine block.
- Carefully lower the oil pan. You may need to gently tap it with a rubber mallet to break the seal.
- Remove the old gasket and thoroughly clean any residual material from both the engine block and oil pan mating surfaces.
- Position the new gasket on the oil pan, aligning it with the bolt holes.
- Reinstall the oil pan and tighten the fasteners in a crisscross pattern to the manufacturer's specified torque.
- Refill the engine with a recommended grade of oil and check for leaks after running the engine for a few minutes.
Troubleshooting & FAQ
How do I know if this gasket will fit my Yanmar engine?
The most reliable method is to cross-reference your specific engine model and OEM part number against our compatibility table. This gasket replaces Yanmar part numbers 121000-01751 and 121450-01751. Always visually compare your old gasket to our product images before ordering.
What are the signs of a failing oil pan gasket?
Common symptoms include visible oil drips under the engine, a coating of oil grime on the bottom of the oil pan, and a consistently low oil level requiring frequent top-offs. A leaking gasket can lead to engine damage if not addressed.
Does this gasket require a sealant?
This gasket is designed to create a seal on its own. However, it is best practice to consult your engine's service manual. Some applications may recommend a thin layer of gasket sealant or dressing at corners or joints.
What is the recommended replacement interval?
An oil pan gasket does not have a fixed replacement interval. It should be replaced whenever the oil pan is removed for service or if it shows any signs of leaking.
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
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