Crankshaft Main Bearing Kit +0.10 – Fits Mercruiser/Volvo/GM V6-V8 4.3L, 5.0L, 5.7L (Replaces 818466, 856342)
Crankshaft Main Bearing Kit +0.10 – Fits Mercruiser/Volvo/GM V6-V8 4.3L, 5.0L, 5.7L (Replaces 818466, 856342) 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
Product Details
This aftermarket Crankshaft Main Bearing Kit +0.10 is engineered for a range of Mercruiser, Volvo Penta, OMC, Indmar, and Marine Power engines. It is specifically compatible with GM V6 4.3L and V8 5.0L, 5.7L engines commonly used in sterndrive and inboard marine applications.
It serves as a direct interchange for Mercruiser part numbers 818466, 23-818467, 23-85699, 86599, and MP0009-441, as well as Volvo Penta 856342.
- Designed for oversized applications to restore worn crankshaft journals.
- Includes a complete main bearing set for a full engine rebuild.
- Engineered for internal engine installation by a qualified mechanic.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercruiser | 818466 | |
| Mercruiser | 23-818467 | |
| Mercruiser | 23-85699 | |
| Mercruiser | 86599 | |
| Mercruiser | 856342 | Also a Volvo Penta part number. |
| Volvo Penta | 856342 | |
| Aftermarket | MP0009-441 | |
| Aftermarket | REC13013 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercruiser Sterndrive & Inboard models:
For Volvo Penta Sterndrive & Inboard models:
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| Mercruiser | 4.3L V6 | 4-Stroke | 818466 |
| Mercruiser | 5.0L V8 | 4-Stroke | 818466 |
| Mercruiser | 5.7L V8 | 4-Stroke | 818466 |
| Volvo Penta | 4.3L V6 | 4-Stroke | 856342 |
| Volvo Penta | 5.0L V8 | 4-Stroke | 856342 |
| Volvo Penta | 5.7L V8 | 4-Stroke | 856342 |
Technical Specs
- Product Type
- Crankshaft Main Bearing Kit
- Installation
- Engine Internal Component
- Oversize
- +0.10" (+0.254mm)
- Application
- GM V6 4.3L and V8 5.0L, 5.7L engines
- Contents
- Complete main bearing set
- Dimensions
- 19.0" x 11.5" x 6.0"
- Engine Types
- Sterndrive and Inboard Marine Engines
- Compatibility
- Mercruiser, Volvo Penta, OMC, Indmar, Marine Power
- Other Attributes
- Oversized bearing set for worn crankshaft journals
What’s in the Box
- 1 x Crankshaft Main Bearing Set (+0.10" Oversize) (Replaces 818466, 856342)
Installation Notes
- Ensure the engine is disconnected from the power source and has completely cooled.
- Drain all engine oil and coolant.
- Remove the engine from the boat following the manufacturer's service manual.
- Disassemble the lower engine block to access the crankshaft.
- Carefully remove the old main bearing caps and shells, noting their orientation and position.
- Clean the crankshaft journals and bearing saddles meticulously, removing all oil and residue.
- Measure crankshaft journals to confirm they require a +0.10" oversized bearing.
- Install the new main bearing shells into the block and caps, ensuring they are correctly seated.
- Apply assembly lube to the bearing surfaces and crankshaft journals.
- Reinstall the crankshaft and bearing caps, torquing bolts to the manufacturer's specified sequence and values.
- Check for proper crankshaft rotation and end play.
- Reassemble the engine and reinstall it in the boat, then refill with fresh oil and coolant.
Troubleshooting & FAQ
How do I know if I need +0.10" oversized bearings?
You need oversized bearings when your crankshaft journals are worn and have been machined down by 0.10". This should be determined by a professional mechanic using a micrometer to measure the journals after they have been re-ground.
Will this fit my engine if it's not a Mercruiser or Volvo Penta?
This kit is designed for the underlying GM V6 4.3L and V8 5.0L/5.7L engine blocks, which are used by several marine brands including OMC, Indmar, and Marine Power. Always cross-reference your OEM part number to confirm fitment.
What are the signs of a failing crankshaft main bearing?
Common symptoms include a deep, rumbling or knocking noise from the bottom of the engine that increases with RPM, low oil pressure, and the presence of metallic particles in the engine oil.
Is assembly lube required for installation?
Yes, applying a high-quality assembly lube to all bearing surfaces and crankshaft journals is critical to prevent dry startup and premature wear.
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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