Thermostat Housing Gasket – Fits Yanmar 1GM, 2GM, 3GM Series (Replaces 104211-49160)
Thermostat Housing Gasket – Fits Yanmar 1GM, 2GM, 3GM Series (Replaces 104211-49160) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Free standard shipping on all orders under 1 KG
Thermostat Housing Gasket – Fits Yanmar 1GM, 2GM, 3GM Series (Repla...
Product Details
This Thermostat Housing Gasket – Fits Yanmar 1GM, 2GM, 3GM Series (Replaces 104211-49160) is designed as a dual-purpose seal for both the thermostat and zinc anode housings on Yanmar Marine 1GM, 2GM, and 3GM series diesel engines, primarily models from the 1980s through the 2000s.
It serves as a direct interchange for Yanmar part number 104211-49160.
- Installation: Direct replacement fit.
- Fuel Type: Designed for diesel engine applications.
- Dual Purpose: Seals both the thermostat housing and the zinc anode housing on applicable models.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 104211-49160 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yanmar engines, this gasket's application varies by model. On the 1GM series, it is often used for the zinc anode housing, while on the 2GM, 3GM, and 2QM series, it seals the thermostat housing. Please refer to the "Notes" column for details specific to your engine.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Yanmar | 1GM | 4-Stroke | 104211-49160 | For anode housing and thermostat housing |
| Yanmar | 1GM10, 1GM10(YMI), 1GM10C, 1GM10VE, 1GM10L | 4-Stroke | 104211-49160 | For anode housing (Figure-1 item No.3) |
| Yanmar | 2GM, 2GMF | 4-Stroke | 104211-49160 | For thermostat housing (No.7 in second picture) |
| Yanmar | 2GM20, 2GM20VE, 2GM20B, 2GM20C, 2GM20-YEU, 2GM20C-YEU | 4-Stroke | 104211-49160 | For thermostat housing (No.7 in second picture) |
| Yanmar | 3GM, 3GMF, 3GMD | 4-Stroke | 104211-49160 | For thermostat housing (No.7 in second picture) |
| Yanmar | 3GM30, 3GM30VE, 3GM30B, 3GM30C, 3GM30-YEU, 3GM30C-YEU | 4-Stroke | 104211-49160 | For thermostat housing (No.7 in second picture) |
| Yanmar | 2QM, 2QM15, 2QM20 | 4-Stroke | 104211-49160 | For thermostat housing (No.7 in second picture) |
Technical Specs
- Product Type
- Thermostat/Anode Housing Gasket
- Installation
- Direct Replacement
- Fuel Type
- Diesel
- Housing Material
- Composite/Paper
- Dimensions
- 5.5 in x 4.0 in x 0.1 in
- Other Technical Attributes
- Dual-purpose gasket for both thermostat housing and zinc anode housing
What’s in the Box
- 1 x Thermostat/Anode Housing Gasket (104211-49160)
Installation Notes
- Ensure the engine is completely cool and the battery is disconnected.
- Drain coolant from the system to a level below the housing you are servicing.
- Carefully unbolt and remove the thermostat or anode housing cover.
- Remove the old gasket. Thoroughly clean both mating surfaces, ensuring they are free of any old material, sealant, or corrosion.
- Position the new gasket, making sure all bolt holes align correctly.
- Reinstall the housing cover and tighten the bolts evenly to the manufacturer-specified torque.
- Refill the cooling system with the appropriate coolant. Once full, run the engine and carefully check for any leaks.
Troubleshooting & FAQ
How do I know if this gasket fits my exact Yanmar model?
This gasket fits Yanmar 1GM, 2GM, and 3GM series engines. To ensure a perfect match, please cross-reference the part number 104211-49160 with your engine's service manual and check the compatibility table on this page for model-specific notes.
What are the signs of a failing housing gasket?
Common symptoms include coolant leaks or drips around the thermostat or anode housing area, rust-colored stains, and potential engine overheating. A visual inspection may reveal a brittle, cracked, or degraded gasket.
Is this gasket for the thermostat or the zinc anode housing?
It can be used for both, depending on the engine model. For example, on many 1GM series engines, it seals the anode housing. On 2GM and 3GM series engines, it typically seals the thermostat housing. Always refer to your service manual and our compatibility notes for confirmation.
When should this gasket be replaced?
It is best practice to replace this gasket any time you service the component it seals (e.g., replacing a thermostat or zinc anode). It should also be replaced immediately if you detect a coolant leak.
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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