Main Bearing Kit Oversized 0.10mm – Fits Volvo Penta AQ165/170 Gasoline Engines (Replaces 271218)
Main Bearing Kit Oversized 0.10mm – Fits Volvo Penta AQ165/170 Gasoline Engines (Replaces 271218) 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
Main Bearing Kit Oversized 0.10mm – Fits Volvo Penta AQ165/170 Gaso...
Product Details
This is an aftermarket Main Bearing Kit Oversized 0.10mm designed for Volvo Penta AQ165 and AQ170 gasoline engines. It serves as a direct replacement component for engines requiring a specific bearing oversize during a rebuild or crankshaft service.
It directly replaces Volvo Penta part numbers 271218, 271216, 276696, 276700, 418225, 418231, and 418319, as well as ORB part number ORB11020.
- Engineered for installation in the engine block.
- This is a complete engine set for all main journals.
- Bearings are oversized by 0.10mm (0.004") to compensate for a machined crankshaft.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 271218 |
| Volvo Penta | 271216 |
| Volvo Penta | 276696 |
| Volvo Penta | 276700 |
| Volvo Penta | 418225 |
| Volvo Penta | 418231 |
| Volvo Penta | 418319 |
| ORB | ORB11020 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is verified for the following Volvo Penta engine models.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Volvo Penta | AQ165 | 165 | 4-Stroke | 271218 | Main bearing kit for gas engine |
| Volvo Penta | AQ170 | 170 | 4-Stroke | 271218 | Main bearing kit for gas engine |
Technical Specs
- Product Type
- Main Bearing Kit (Oversized 0.10mm/0.004")
- Installation
- Engine Block
- Fuel Type
- Gasoline
- Dimensions
- 17.0 x 9.0 x 9.0
- Oversize
- 0.10mm (0.004")
- Other Technical Attributes
- Complete engine set, oversized by 0.10mm/0.004"
What’s in the Box
- 1 x Main Bearing Set (Replaces 271218)
Installation Notes
- Refer to your engine's official service manual before beginning work.
- Disconnect the battery and drain all engine oil.
- Remove components to access the crankshaft, including the oil pan and main bearing caps.
- Carefully remove the old main bearings from the block and caps, noting their positions.
- Thoroughly clean the bearing saddles and crankshaft journals. Ensure they are free of oil and debris.
- Install the new bearings, applying assembly lube to the bearing surfaces.
- Reinstall the crankshaft and main bearing caps, torquing bolts to the manufacturer's specifications.
- Use Plastigage to verify oil clearances are within the specified tolerance for the 0.10mm oversize.
- Complete reassembly of engine components.
- Refill with new engine oil to the correct level.
- Start the engine and check for proper oil pressure and any oil leaks.
Troubleshooting & FAQ
How do I know if this oversized bearing kit is correct for my engine?
This 0.10mm oversized kit is used when an engine's crankshaft has been machined (ground down) during a rebuild. You must measure the crankshaft main journals with a micrometer to determine if they are undersized. Consult your Volvo Penta service manual to confirm the exact required bearing size based on your measurements.
Is this a complete set for the entire engine?
Yes, this is a complete main bearing kit containing all the bearing shells required for all main journals in the compatible Volvo Penta AQ165 and AQ170 engines.
What are the signs of failing main bearings?
Common symptoms include a deep, heavy knocking sound from the lower engine that increases with RPM, low or fluctuating oil pressure readings, and the presence of metallic particles (bearing material) in the engine oil and filter.
What is the difference between this and a standard size kit?
This oversized kit features bearings that are 0.10mm (0.004") thicker than standard bearings. This extra thickness compensates for material removed from the crankshaft journals during machining. Using this kit on a standard, un-machined crankshaft will result in incorrect oil clearances and rapid engine failure.
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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