Yanmar Gasket 119000-01771 – Fits Yanmar 4LH & 6LY Series Marine Engines
Yanmar Gasket 119000-01771 – Fits Yanmar 4LH & 6LY Series Marine Engines 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
Free standard shipping on all orders under 1 KG
Yanmar Gasket 119000-01771 – Fits Yanmar 4LH & 6LY Series Marin...
Product Details
This genuine-quality Yanmar Gasket 119000-01771 is designed for reliable sealing in the gear housing assembly of various Yanmar marine diesel engines. It provides a precise fit for multiple engine families, including the 4LH, 4LHA, 6LY, 6LY2, 6LYA, and 6LYM series, ensuring leak-free performance in demanding marine environments.
This part is a direct replacement for Yanmar part numbers 119000-01770 and 119000-01771.
- Installation Location: Gear Housing
- Material: High-strength, non-asbestos gasket material
- Includes: One gasket per package
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Yanmar | 119000-01770 | 119000-01771 |
| Yanmar | 119000-01771 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is used across several Yanmar diesel engine series, including the 4LH, 4LHA, 6LY, and 6LYM families. Please verify your specific model below.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Yanmar | 4LH-UT | 119000-01771 | Gear Housing |
| Yanmar | 4LH-TE | 119000-01771 | Gear Housing |
| Yanmar | 4LH-HTE | 119000-01771 | Gear Housing |
| Yanmar | 4LH-HT | 119000-01771 | Gear Housing |
| Yanmar | 4LH-STZAY | 119000-01771 | Gear Housing |
| Yanmar | 4LHA-HTE(P) | 119000-01771 | Gear Housing |
| Yanmar | 4LHA-DTZE(P) | 119000-01771 | Gear Housing |
| Yanmar | 4LHA-STE(P) | 119000-01771 | Gear Housing |
| Yanmar | 4LHA-STZE(P) | 119000-01771 | Gear Housing |
| Yanmar | 6LY-ST | 119000-01771 | Gear Housing |
| Yanmar | 6LY-WSTZY | 119000-01771 | Gear Housing |
| Yanmar | 6LY-WST | 119000-01771 | Gear Housing |
| Yanmar | 6LYA-STE | 119000-01771 | Gear Housing |
| Yanmar | 6LYA-STP | 119000-01771 | Gear Housing |
| Yanmar | 6LY2-STVY | 119000-01771 | Gear Housing |
| Yanmar | 6LY2M-WST | 119000-01771 | Gear Housing |
| Yanmar | 6LY2A-STP | 119000-01771 | Gear Housing |
| Yanmar | 6LY2-WDT | 119000-01771 | Gear Housing |
| Yanmar | 6LY2-WDTZY | 119000-01771 | Gear Housing |
| Yanmar | 6LYM-STE | 119000-01771 | Gear Housing |
| Yanmar | 6LYM-UTEHD | 119000-01771 | Gear Housing |
| Yanmar | 4TN100TL-GD | 119000-01771 | Gear Housing |
Technical Specs
- Product Type
- Sealing Gasket
- Installation
- Gear Housing
- Material
- Non-Asbestos Gasket Material
- Dimensions
- 8.0" L x 3.5" W x 0.1" H
- OEM Part Number
- 119000-01771
- Superseded Part
- 119000-01770
What’s in the Box
- 1 x Gasket (119000-01771)
Installation Notes
- Ensure both the gear housing and cover surfaces are completely clean, dry, and free of old gasket material, oil, or debris.
- Inspect the mating surfaces for any warping, cracks, or deep scratches that could compromise the seal.
- Carefully place the new gasket onto the housing, aligning it with all bolt holes. Do not use sealant unless specified by the engine manufacturer for your model.
- Position the cover over the gasket and hand-tighten the bolts.
- Following the manufacturer's service manual, tighten the bolts in the specified sequence and to the recommended torque value to ensure even pressure.
Troubleshooting & FAQ
How do I know if this is the right gasket for my Yanmar engine?
The best way to confirm fitment is to match your engine model to our compatibility list and verify the part number. The OEM part number for this gasket is 119000-01771. Cross-reference this with your engine's service manual or the existing part.
What are the signs of a failing gear housing gasket?
Common symptoms include oil leaks around the gear housing cover, a noticeable drop in oil level, or oil contamination in the bilge. A visual inspection may reveal gasket material that is brittle, cracked, or extruding from the seam.
Can I reuse the old gasket?
No. Gaskets are single-use components designed to compress and create a seal. Once removed, they lose their sealing ability and must be replaced to prevent leaks.
Does this gasket require a sealant?
Generally, modern gaskets like this one are designed to be installed dry. However, always consult your Yanmar service manual. If the manual specifies a sealant or dressing for your specific application, follow those instructions.
The part number on my old gasket is 119000-01770. Will this one fit?
Yes, part number 119000-01771 is the direct replacement that superseded 119000-01770. It will fit and function correctly in its place.
What is the difference between OEM and aftermarket parts?
This listing is for an aftermarket replacement, not an OEM part. It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility. Each batch is inspected for quality and consistency.
How fast do you ship and what does it cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most locations; expedited options appear at checkout where available.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against 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 quality control.
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