Connecting Rod Bearing Pair – Fits Yanmar 1GM, 1GM10, 2GM, 3GM Diesel Engines (Replaces 705311-23600)
Connecting Rod Bearing Pair – Fits Yanmar 1GM, 1GM10, 2GM, 3GM Diesel Engines (Replaces 705311-23600) 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
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Connecting Rod Bearing Pair – Fits Yanmar 1GM, 1GM10, 2GM, 3GM Dies...
Product Details
This standard-dimension Connecting Rod Bearing Pair is engineered for a range of Yanmar Marine Diesel Engines, compatible with the 1GM, 1GM10, 2GM, 2GM20, 3GM, and 3GM30 series manufactured through 2004.
It serves as a direct interchange for Yanmar part numbers 705311-23600, 705225-23600, 105311-23300, and 105225-23300.
- Standard-dimension (STD) for straightforward installation.
- Designed specifically for diesel engine environments.
- Includes a complete half-shell pair for one connecting rod.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yanmar | 705311-23600 | Primary replacement part. |
| Yanmar | 705225-23600 | Superseded by 705311-23600 |
| Yanmar | 105311-23300 | Superseded by 705311-23600 |
| Yanmar | 105225-23300 | Superseded by 705311-23600 |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
This part is confirmed to fit the following Yanmar marine diesel engines.
| Brand | Model | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yanmar | 1GM | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 1GM10 | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 2GM | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 2GMF | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 2GM20 | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 2GM20F | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 2GM20-YEU | 4-Stroke | 1996–2004 | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 3GM | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 3GMD | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 3GMF | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 3GM30 | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
| Yanmar | 3GM30F | 4-Stroke | All | 705311-23600 | Superseded from 105225-23300 |
Technical Specs
- Product Type
- Connecting Rod Bearing Pair
- Installation
- Standard-dimension (STD)
- Fuel Type
- Diesel
- Application
- Crankshaft connecting rod
- Dimensions
- 6.0" L x 3.0" W x 6.0" H
- Fitting Type
- Half-shell pair (one complete set)
- Other Technical Attributes
- Crank Pin Bearing
What’s in the Box
- 2 x Connecting Rod Bearing Half-Shells (equivalent to one complete conrod set, replacing 705311-23600)
Installation Notes
- Ensure the engine is off and the battery is disconnected. Drain the engine oil completely.
- Access the connecting rod caps from the bottom of the engine. This may require removing the oil pan.
- Carefully remove the connecting rod cap for the cylinder you are servicing. Note the orientation of the cap.
- Remove the old bearing half-shells from the rod and the cap.
- Thoroughly clean the bearing surfaces on the connecting rod and cap. Ensure they are free of oil, debris, and burrs.
- Apply a generous amount of assembly lube to the new bearing half-shells.
- Install the new bearings into the rod and cap, ensuring the locking tabs seat correctly.
- Reinstall the connecting rod cap in its original orientation and torque the bolts to the manufacturer's specifications.
- Repeat the process for any other cylinders as needed.
- Re-install the oil pan with a new gasket, refill the engine with fresh oil, and check for leaks upon starting.
Troubleshooting & FAQ
How do I know if these bearings will fit my specific Yanmar engine?
First, verify your engine model is listed in the compatibility table (e.g., 2GM20, 3GM30). Second, confirm it falls within the specified year range (through 2004 for most models). Finally, if possible, cross-reference the part number 705311-23600 with your service manual or the old part.
What are the signs of a failing connecting rod bearing?
The most common symptom is a persistent, rhythmic knocking or ticking sound from the engine that increases in frequency with RPMs. Other signs include low oil pressure readings, a lit oil pressure warning light, and visible metallic shavings in the engine oil during an oil change.
Is this a complete set for one piston?
Yes, this product includes two half-shells, which form one complete bearing pair for a single connecting rod.
What is the difference between standard (STD) and oversized/undersized bearings?
Standard (STD) bearings are used when the crankshaft's connecting rod journal is within its original factory dimensions. Oversized or undersized bearings are required only if the crankshaft has been machined down during a rebuild.
When should I replace my connecting rod bearings?
Bearings are typically replaced during a major engine overhaul or when symptoms of failure (like engine knock) are diagnosed. They are a wear item but do not have a fixed replacement interval; their lifespan depends on engine hours, load, and maintenance history.
Can I replace just one connecting rod bearing?
While it is possible to replace a single bearing set, it is best practice to replace all connecting rod bearings at the same time during an engine rebuild to ensure even wear and balanced performance.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency and reliability.
How fast is shipping & what does it cost?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free for most orders; expedited options and exact costs will appear at checkout where available.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window Pfor 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 before purchasing. If anything differs—even if your model appears on the compatibility list—do not purchase.
- This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component.
- Professional installation is highly recommended to ensure safety, proper fitment, and optimal engine performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world saltwater and freshwater conditions.
- Fast Global Fulfillment — With warehouses on multiple continents, we offer free standard delivery to most regions, typically arriving in 5–15 days.
- Manufacturer-Direct Value — By working directly with our manufacturing partners, we provide fair pricing without compromising on materials or quality control.
Payment & Security
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