Cooler Gasket – Fits Yanmar 4LH/4LHA Series Marine Engines (Replaces 119174-13201)
Cooler Gasket – Fits Yanmar 4LH/4LHA Series Marine Engines (Replaces 119174-13201) 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
Cooler Gasket – Fits Yanmar 4LH/4LHA Series Marine Engines (Replace...
Product Details
This aftermarket Cooler Gasket for Yanmar 4LH/4LHA Series Marine Engines is engineered for a precise fit on 4-stroke marine diesel engines (125–300 HP) manufactured between 1994–2006. It provides a reliable, long-lasting seal for the engine's cooling system, preventing leaks and ensuring optimal performance.
It serves as a direct interchange for Yanmar part numbers 119174-13201, the older 119171-13200, and is equivalent to the newer 119595-13200.
- Designed for direct, hassle-free installation.
- Constructed from advanced materials for high resistance to heat, pressure, and corrosion.
- Engineered specifically for high-temperature marine diesel applications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Superseded By | Notes |
|---|---|---|---|
| Yanmar | 119171-13200 | 119174-13201 | Older Part Number |
| Yanmar | 119174-13201 | 119595-13200 | Original Part Number |
| Yanmar | 119595-13200 | — | Newer/Current OEM Number |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yanmar | 4LH-DTE | 125–140 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-DTZ | 125–140 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-HT | 150–160 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-HTE | 150–160 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-HTZ | 150–160 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-HTZAY | 150–160 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-ST | 170–180 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-STE | 170–180 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-STZ | 170–180 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-STZAY | 170–180 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-TE | 100–110 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-UT | 125–135 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-UTZ | 125–135 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LH-UTZAY | 125–135 | 4-Stroke | 1994–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-DTE | 180–200 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-DTE(P) | 180–200 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-DTP | 180–200 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-DTZE | 180–200 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-DTZE(P) | 180–200 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-DTZP | 180–200 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-HTE | 200–230 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-HTE(P) | 200–230 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-HTP | 200–230 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-HTZE | 200–230 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-HTZE(P) | 200–230 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-HTZP | 200–230 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-STE | 240–280 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-STE(P) | 240–280 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-STP | 240–280 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-STZE | 240–280 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
| Yanmar | 4LHA-STZE(P) | 240–280 | 4-Stroke | 1995–2006 | 119174-13201 | Superseded by 119595-13200 |
Technical Specs
- Product Type
- Cooler Gasket
- Installation
- Direct Replacement
- Fuel Type
- Diesel
- Housing Material
- Heat-Resistant Gasket Material
- Dimensions (L x W x H)
- 43.5 x 14.0 x 0.3 cm
- Operating Temperature
- High-temperature application
- Other Technical Attributes
- High resistance to heat, pressure, and corrosion
What’s in the Box
- 1 x Cooler Gasket (replaces 119174-13201 / 119595-13200)
Installation Notes
- Ensure the engine is completely cool and the battery is disconnected before starting.
- Drain the engine's coolant into a suitable container.
- Carefully disconnect any hoses or attachments and remove the cooler assembly.
- Remove the old gasket. Thoroughly clean and inspect both mating surfaces to ensure they are free of debris, corrosion, or old gasket material.
- Align and place the new gasket onto the clean surface, ensuring it is seated correctly.
- Reinstall the cooler assembly and tighten all mounting bolts to the manufacturer's specified torque sequence and values.
- Reconnect all hoses, refill the system with the appropriate coolant, and inspect for any immediate leaks.
- Once reassembled, start the engine and let it reach operating temperature, continuing to check for leaks.
Troubleshooting & FAQ
How do I confirm this gasket fits my Yanmar engine?
This part fits Yanmar 4LH and 4LHA series engines. For an exact match, please verify your specific model and year against the "Engine & Model Compatibility" table above. Comparing the part visually to your old one is also a reliable confirmation step.
What are the signs of a failing cooler gasket?
Common symptoms include external coolant leaks around the cooler housing, engine overheating, or milky, discolored engine oil, which can indicate coolant mixing with the oil.
What is the difference between part numbers 119174-13201 and 119595-13200?
Yanmar updated the original part number 119174-13201 to the newer 119595-13200. This aftermarket gasket is manufactured to serve as a direct replacement for both of these OEM part numbers.
Do I need to use sealant with this gasket?
This gasket is designed to create a seal without additional chemical sealants. Applying sealant is generally not recommended unless explicitly required by your engine's service manual for specific applications.
When should this gasket be replaced?
It is best practice to replace the cooler gasket anytime the cooler is removed for service. It should also be replaced immediately if you observe any signs of leakage or failure.
My engine is listed, but my old part looks different. What should I do?
Do not attempt to install the part. Engine manufacturers sometimes make mid-year design changes. Please contact us with your engine's serial number and photos of your old part so we can help verify the correct fitment before you buy.
Is this an OEM part or an aftermarket one?
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.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
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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