Connecting Rod Bearing (Mark 6) – Fits Yanmar 6LP/6LPA Series Marine Engines (Replaces 119770-01040)
Connecting Rod Bearing (Mark 6) – Fits Yanmar 6LP/6LPA Series Marine Engines (Replaces 119770-01040) 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
Connecting Rod Bearing (Mark 6) – Fits Yanmar 6LP/6LPA Series Marin...
Product Details
This Connecting Rod Bearing (Mark 6) is an essential internal component for Yanmar 6LP/6LPA series marine diesel engines. It provides a direct fit for models including 6LP-DT, 6LP-DTE, 6LPA-DTP, 6LPA-STP, and others in the series, ensuring reliable engine performance.
It serves as a direct replacement for Yanmar part number 119770-01040.
- Installation: Designed as an internal engine component.
- Fuel Compatibility: Suitable for diesel engines.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 119770-01040 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is designed for the following Yanmar Marine engines.
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| Yanmar | 6LP-DT | 4-Stroke | 119770-01040 |
| Yanmar | 6LP-DTE | 4-Stroke | 119770-01040 |
| Yanmar | 6LP-DTZE | 4-Stroke | 119770-01040 |
| Yanmar | 6LP-DTZY | 4-Stroke | 119770-01040 |
| Yanmar | 6LP-ST | 4-Stroke | 119770-01040 |
| Yanmar | 6LP-STE | 4-Stroke | 119770-01040 |
| Yanmar | 6LP-STZE | 4-Stroke | 119770-01040 |
| Yanmar | 6LP-STZY | 4-Stroke | 119770-01040 |
| Yanmar | 6LP-WDT | 4-Stroke | 119770-01040 |
| Yanmar | 6LP-WDTZY | 4-Stroke | 119770-01040 |
| Yanmar | 6LPA-DTP | 4-Stroke | 119770-01040 |
| Yanmar | 6LPA-DTZP | 4-Stroke | 119770-01040 |
| Yanmar | 6LPA-STP | 4-Stroke | 119770-01040 |
| Yanmar | 6LPA-STZ | 4-Stroke | 119770-01040 |
Technical Specs
- Product Type
- Connecting Rod Bearing
- Installation
- Internal Engine Component
- Fuel Type
- Diesel
- Dimensions
- Height: 90 mm (3.54 in), Width: 80 mm (3.15 in), Length: 85 mm (3.35 in)
- Weight
- 0.05 kg (0.11 lb)
- Size Designation
- Mark 6
What’s in the Box
- 1 x Connecting Rod Bearing (Mark 6) (119770-01040)
Installation Notes
- Disconnect the vessel's battery and ensure the engine is cool.
- Drain the engine oil completely into a suitable container.
- Access the engine's oil pan and remove it to expose the crankshaft and connecting rods.
- Identify the connecting rod requiring the new bearing. Rotate the crankshaft for access if needed.
- Carefully unbolt and remove the connecting rod cap. Note the orientation of the cap and bearing shells.
- Remove the old bearing shells from the rod and cap.
- Thoroughly clean the rod, cap, and crankshaft journal surfaces. Inspect for any scoring or damage.
- Apply a generous amount of high-quality engine assembly lube to the new bearing shells.
- Install the new bearing shells into the rod and cap, ensuring they are seated correctly.
- Reinstall the connecting rod cap in its original orientation and torque the bolts to the manufacturer's specifications using a calibrated torque wrench.
- Reinstall the oil pan with a new gasket, refill with fresh engine oil, and reconnect the battery.
- Before starting, prime the engine's oil system if possible. Start the engine and check for proper oil pressure and any unusual noises.
Troubleshooting & FAQ
How do I know this is the correct bearing size for my engine?
This is a "Mark 6" size bearing. Yanmar engines often use several bearing sizes (e.g., Mark 2-6) to accommodate slight variances in manufacturing tolerances. It is critical to check your engine's service manual or the marking on your old bearing to confirm you are ordering the correct size. Using the wrong size can lead to catastrophic engine failure.
What are the symptoms of a failing connecting rod bearing?
The most common sign is a rhythmic knocking or tapping sound from the engine, often called "rod knock," which may change with engine RPM. Other symptoms include low oil pressure readings, a lit oil pressure warning light, and the presence of metallic shavings or glitter in the engine oil and filter.
Can I replace just one connecting rod bearing?
While it is technically possible to replace a single bearing, it is highly recommended to inspect all connecting rod bearings and consider replacing them as a complete set. This ensures even wear, proper engine balance, and helps prevent future failures. Always follow the guidelines in your engine’s official service manual.
Is any special preparation needed before installation?
Yes. Cleanliness is critical. Ensure the crankshaft journal and connecting rod surfaces are immaculately clean and free of old oil or debris. Applying a quality engine assembly lube to the bearing surfaces before installation is mandatory to prevent a dry start and immediate damage.
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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