Exhaust Elbow Gasket – Fits Yanmar 1GM, 2GM Series (Replaces 128170-13201)
Exhaust Elbow Gasket – Fits Yanmar 1GM, 2GM Series (Replaces 128170-13201) is backordered and will ship as soon as it is back in stock.
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Exhaust Elbow Gasket – Fits Yanmar 1GM, 2GM Series (Replaces 128170...
Product Details
This high-quality Exhaust Elbow Gasket provides a reliable seal for the mixing elbow on Yanmar Marine 1-cylinder (1GM, 1GM10) and 2-cylinder (2GM, 2GM20) raw water cooled diesel engines. It ensures a leak-free connection, critical for maintaining engine performance and safety.
It is a direct replacement for Yanmar OEM part number 128170-13201.
- Designed for a 3-bolt flange installation.
- For use with mixing elbow 128170-13530.
- Engineered for marine diesel environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 128170-13201 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yanmar engines, please note that compatibility can vary. This part is specifically for raw water cooled models in the 2GM series.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Yanmar | 1GM | 4-Stroke | 128170-13201 | |
| Yanmar | 1GMY-C | 4-Stroke | 128170-13201 | |
| Yanmar | 1GMY-EC | 4-Stroke | 128170-13201 | |
| Yanmar | 1GMYS-C | 4-Stroke | 128170-13201 | |
| Yanmar | 1GMYS-EC | 4-Stroke | 128170-13201 | |
| Yanmar | 1GM10 | 4-Stroke | 128170-13201 | |
| Yanmar | 1GM10C | 4-Stroke | 128170-13201 | |
| Yanmar | 1GM10VE | 4-Stroke | 128170-13201 | |
| Yanmar | 1GM10(YMI) | 4-Stroke | 128170-13201 | |
| Yanmar | 1GM10L | 4-Stroke | 128170-13201 | |
| Yanmar | 2GM | 4-Stroke | 128170-13201 | Raw water cooled models only |
| Yanmar | 2GM20 | 4-Stroke | 128170-13201 | Raw water cooled models only |
| Yanmar | 2GM20-YEU | 4-Stroke | 128170-13201 | Raw water cooled models only |
| Yanmar | 3GM | 4-Stroke | 128170-13201 | |
| Yanmar | 3GM30 | 4-Stroke | 128170-13201 | |
| Yanmar | 3HM | 4-Stroke | 128170-13201 | |
| Yanmar | 3HM35 | 4-Stroke | 128170-13201 |
Technical Specs
- Product Type
- Exhaust Elbow Gasket
- Installation
- 3-bolt flange
- Fuel Type
- Diesel
- Connection
- For mixing elbow 128170-13530
- Dimensions
- 7.0" L x 8.5" W x 0.2" H
- Fitting Type
- Flange
- Warranty
- 6 months
- Other Technical Attributes
- For use with raw water cooled models
What’s in the Box
- 1 x Gasket (128170-13201)
Installation Notes
- Ensure the engine is completely cool and the battery is disconnected before starting work.
- Carefully remove the mounting bolts securing the exhaust mixing elbow.
- Remove the old elbow and gasket. Use a plastic scraper to gently clean any residual gasket material from both the manifold and elbow mating surfaces. Avoid scratching the metal.
- Place the new gasket onto the mounting studs, ensuring it is correctly aligned.
- Re-install the exhaust mixing elbow and hand-tighten the bolts.
- Following your engine's service manual, tighten the bolts in the recommended sequence to the specified torque. Do not overtighten.
- After installation, start the engine and carefully check for any exhaust or water leaks around the flange.
Troubleshooting & FAQ
How do I confirm this gasket fits my specific Yanmar engine?
This gasket is made for Yanmar 1GM, 1GM10, 2GM, and 2GM20 series engines. It is critical to note that for the 2GM series, it is only compatible with raw water cooled models. The best way to ensure fitment is to match the part number 128170-13201 with the one listed in your engine's service manual or parts diagram.
What are common symptoms of a failing exhaust elbow gasket?
Signs of a faulty gasket include visible water or soot streaks around the elbow-manifold joint, a hissing sound from the engine bay, reduced engine performance, or excessive steam/water from the exhaust outlet. A leak in this area can lead to serious engine damage if not addressed.
Do I need to use gasket sealant with this part?
This gasket is typically designed to be installed dry. Applying sealant can sometimes cause it to slip or not seal correctly. Always follow the specific instructions in your official Yanmar service manual, as recommendations can vary.
What's the difference between this and a genuine Yanmar gasket?
This is a high-quality aftermarket part, not a genuine OEM component. It has been manufactured to meet or exceed original equipment specifications for material, dimensions, and performance, offering a reliable, cost-effective solution.
Is this part for fresh water or raw water cooled engines?
This gasket is specified for raw water cooled models, particularly for the 2GM and 2GM20 engines. While it fits other models like the 1GM series, always verify against your specific engine configuration.
What is the recommended replacement interval for this gasket?
There is no fixed replacement interval for this gasket. It should be replaced whenever the exhaust mixing elbow is removed for service, inspection, or replacement. It is also good practice to inspect it regularly for any signs of leaks or degradation.
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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