Cylinder Head Gasket – Fits Yanmar 6LP & 6LPA Series Marine Engines (Replaces 119770-00930)
Cylinder Head Gasket – Fits Yanmar 6LP & 6LPA Series Marine Engines (Replaces 119770-00930) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Cylinder Head Gasket – Fits Yanmar 6LP & 6LPA Series Marine Eng...
Product Details
This high-quality Cylinder Head Gasket is designed for Yanmar 6LP and 6LPA series marine diesel engines, providing a durable and precise seal between the cylinder head and engine block. It prevents coolant and combustion gas leaks while maintaining proper compression and reliable engine performance.
This part is a direct aftermarket replacement for Yanmar part number 119770-00930.
- Installation: Direct replacement fit
- Specification: Conforms to Mark 1 specification
- Fuel Type: Compatible with diesel engines
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yanmar | 119770-00930 | Mark 1 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Designed for Yanmar 6LP/6LPA series diesel engines.
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| Yanmar | 6LP-DT | 4-Stroke | 119770-00930 |
| Yanmar | 6LP-DTP | 4-Stroke | 119770-00930 |
| Yanmar | 6LP-DTZE | 4-Stroke | 119770-00930 |
| Yanmar | 6LP-DTZE1 | 4-Stroke | 119770-00930 |
| Yanmar | 6LP-DTZEP | 4-Stroke | 119770-00930 |
| Yanmar | 6LP-DTZEP1 | 4-Stroke | 119770-00930 |
| Yanmar | 6LP-DTZY | 4-Stroke | 119770-00930 |
| Yanmar | 6LP-WDT | 4-Stroke | 119770-00930 |
| Yanmar | 6LP-WDTZY | 4-Stroke | 119770-00930 |
| Yanmar | 6LPA-DTE | 4-Stroke | 119770-00930 |
| Yanmar | 6LPA-DTP | 4-Stroke | 119770-00930 |
| Yanmar | 6LPA-DTZE | 4-Stroke | 119770-00930 |
| Yanmar | 6LPA-DTZP | 4-Stroke | 119770-00930 |
| Yanmar | 6LPA-DTZEP1 | 4-Stroke | 119770-00930 |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Installation
- Direct replacement
- Fuel Type
- Diesel
- Dimensions
- 66.5 cm L x 18.5 cm W x 0.1 cm H
- Weight
- 1 kg (2.2 lb)
- Warranty
- 6 months (when purchased as genuine Yanmar part)
- Other Technical Attributes
- Mark 1 specification
What’s in the Box
- 1 x Cylinder Head Gasket (119770-00930)
Installation Notes
- Disconnect the battery and completely drain the engine's cooling system.
- Remove components attached to the cylinder head, such as intake/exhaust manifolds, fuel lines, and wiring. Label all connections for easier reassembly.
- Loosen and remove the cylinder head bolts in the reverse sequence specified by the engine's service manual to prevent head warping.
- Carefully lift the cylinder head off the engine block. Avoid using pry tools that could gouge or damage the mating surfaces.
- Thoroughly clean both the cylinder head and engine block surfaces. Ensure they are completely free of old gasket material, oil, and debris.
- Inspect both mating surfaces for flatness using a straightedge and feeler gauge. Address any warping or damage before proceeding.
- Position the new gasket correctly on the engine block, following any "UP" or "FRONT" markings. Do not use sealant unless specifically required by the service manual.
- Carefully lower the cylinder head back onto the block and gasket, ensuring it is properly aligned.
- Install new cylinder head bolts. Torque the bolts in the correct sequence and to the manufacturer's specified torque values, often performed in multiple stages.
- Reassemble all components that were previously removed.
- Refill the cooling system, reconnect the battery, and double-check all connections.
- Start the engine and check for any coolant, oil, or exhaust leaks. After a short run-in period, re-torque the head bolts if recommended by the service manual.
Troubleshooting & FAQ
How do I know if my cylinder head gasket is failing?
Common signs include engine overheating, white smoke from the exhaust (indicating burning coolant), milky or frothy engine oil, unexplained coolant loss, and bubbling in the coolant reservoir or radiator.
Is this "Mark 1" gasket different from other versions?
Yes, the "Mark 1" designation is specific to certain Yanmar 6LP series engines. It is crucial to match this specification to your engine to ensure a proper seal and correct piston-to-head clearance.
Do I need to use sealant with this gasket?
No, this gasket is a multi-layer steel (MLS) type designed to be installed dry. Applying sealants can interfere with its ability to seal properly. Ensure mating surfaces are immaculately clean and dry before installation.
Can I reuse my old cylinder head bolts?
It is strongly recommended to use new cylinder head bolts. Most are "torque-to-yield" (TTY) bolts that permanently stretch during the initial installation and will not provide the correct clamping force if reused.
How does this part compare to the genuine Yanmar gasket?
This aftermarket gasket is manufactured to meet or exceed OEM specifications using high-quality, comparable materials. It is designed to provide reliable performance and a durable seal at a more accessible price point.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
