Main Bearing Kit – Fits Volvo Penta AQ165/AQ170/BB165/BB170 B30 Engines (Replaces 271217)
Main Bearing Kit – Fits Volvo Penta AQ165/AQ170/BB165/BB170 B30 Engines (Replaces 271217) is backordered and will ship as soon as it is back in stock.
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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
Main Bearing Kit – Fits Volvo Penta AQ165/AQ170/BB165/BB170 B30 Eng...
Product Details
This is a standard-size Main Bearing Kit for Volvo Penta B30 series gasoline engines, specifically models AQ165A, AQ170A/B/C, BB165A, and BB170A/B/C manufactured between 1969 and 1975. This internal engine component is crucial for ensuring smooth crankshaft rotation.
It serves as a direct replacement for Volvo Penta part number 271217 and interchanges with aftermarket parts including Orbitrade 11019 and AM271217.
- Installation Type: Internal engine component for crankshaft
- Construction: Durable tri-metal housing material
- Bearing Size: Standard size (not oversize)
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 271217 | Original Equipment Manufacturer part (Expired) |
| Orbitrade | 11019 | Aftermarket Replacement |
| AM | AM271217 | Aftermarket Replacement |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is designed for specific Volvo Penta B30 series gasoline engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AQ165A | 165 | 4-Stroke | 1969–1975 | 271217 | B30 engine |
| Volvo Penta | AQ170A | 170 | 4-Stroke | 1969–1975 | 271217 | B30 engine |
| Volvo Penta | AQ170B | 170 | 4-Stroke | 1969–1975 | 271217 | B30 engine |
| Volvo Penta | AQ170C | 170 | 4-Stroke | 1969–1975 | 271217 | B30 engine |
| Volvo Penta | BB165A | 165 | 4-Stroke | 1969–1975 | 271217 | B30 engine |
| Volvo Penta | BB170A | 170 | 4-Stroke | 1969–1975 | 271217 | B30 engine |
| Volvo Penta | BB170B | 170 | 4-Stroke | 1969–1975 | 271217 | B30 engine |
| Volvo Penta | BB170C | 170 | 4-Stroke | 1969–1975 | 271217 | B30 engine |
Technical Specs
- Product Type
- Crankshaft Main Bearing Kit (Standard Size)
- Installation
- Internal Engine Component
- Fuel Type
- Gasoline
- Housing Material
- Tri-Metal Construction
- Product Dimensions
- 16.0cm x 11.5cm x 12.0cm (L x W x H)
- Weight
- 0.35 kg (0.77 lbs)
- Other Attributes
- Standard size bearings (not oversize); Used along the crankshaft (not connecting rod bearings)
Installation Notes
- Thoroughly clean the engine block main bearing saddles and caps, ensuring they are free of old material, oil, and debris.
- Place the upper bearing halves into the saddles in the engine block. Ensure the locking tangs are correctly seated.
- Apply a liberal amount of quality engine assembly lube to the surface of all bearing halves.
- Carefully lower the crankshaft into place onto the upper bearing halves.
- Install the corresponding lower bearing halves into the main bearing caps.
- Install the main bearing caps in their correct positions and orientations.
- Tighten the main cap bolts in the sequence and to the torque values specified in your engine's service manual.
- Verify the crankshaft rotates smoothly by hand after torquing.
Troubleshooting & FAQ
How do I know if I need standard or oversize bearings?
This kit contains standard size main bearings. Oversize bearings are typically required only after a crankshaft has been machined (ground) during a rebuild. Always measure the crankshaft journals with a micrometer to confirm the required bearing size before ordering.
What are the signs of failing main bearings?
Common symptoms of worn main bearings include a deep, heavy knocking or rumbling sound from the engine that may increase with RPM, low oil pressure readings, and the presence of metallic (often copper-colored) flakes in the engine oil and filter.
Are these main bearings for the crankshaft or connecting rods?
These are main bearings, which support the crankshaft within the engine block. They are different from connecting rod bearings, which are located at the crankshaft end of the connecting rods.
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
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