Bearing – Fits Yamaha 6-8 HP Outboard Motors (Replaces 93310-418U0/93310-41809)
Bearing – Fits Yamaha 6-8 HP Outboard Motors (Replaces 93310-418U0/93310-41809) is backordered and will ship as soon as it is back in stock.
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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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Bearing – Fits Yamaha 6-8 HP Outboard Motors (Replaces 93310-418U0/...
Product Details
This high-quality aftermarket Bearing – Fits Yamaha 6-8 HP Outboard Motors (Replaces 93310-418U0/93310-41809) is designed as a direct replacement needle bearing for the connecting rod assembly in Yamaha 2-stroke E8D, 6B, and 8B series outboard motors from the 1980s through the 2000s.
It serves as a direct interchange for Yamaha part numbers 93310-418U0-00 and 93310-41809-00, and is cross-referenced to Mariner 31-94769M.
- Engineered for installation within the engine crankshaft and connecting rod assembly.
- Constructed with a durable steel housing for reliable performance.
- Package includes one needle roller bearing.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 93310-418U0-00 | |
| Yamaha | 93310-41809-00 | |
| Mariner | 31-94769M | Cross-referenced part |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Yamaha: This bearing fits specific 2-stroke models including the E8D, 6B, and 8B series, often designated with "AH" in parts diagrams for the 5-8 HP range.
Mariner: Compatibility is confirmed via part number cross-reference. Verify your specific model requires part 31-94769M.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | E8D | 8 | 2-Stroke | 93310-418U0 | |
| Yamaha | 6B | 6 | 2-Stroke | 93310-418U0 | |
| Yamaha | 8B | 8 | 2-Stroke | 93310-418U0 | |
| Yamaha | 5-8 HP | 5-8 | 2-Stroke | 93310-418U0 | AH designation on parts diagrams |
| Mariner | 31-94769M | Cross-referenced part |
Technical Specs
- Product Type
- Needle Bearing (Con-Rod/Connecting Rod Bearing)
- Installation
- Engine Crankshaft Assembly
- Housing Material
- Steel
- Dimensions
- 18 × 24 × 12 mm (inner × outer × width)
- Other Technical Attributes
- Bearing Type: KT (Needle Roller Bearing)
What’s in the Box
- 1 × Bearing (Replaces 93310-418U0-00 / 93310-41809-00)
Installation Notes
Replacing an engine bearing is an advanced procedure that requires specialized tools and mechanical expertise. The general process involves disassembling the engine powerhead to access the crankshaft and connecting rods. Always consult your engine’s official service manual for detailed instructions, torque specifications, and safety precautions.
- Drain all engine fluids (oil, fuel) and disconnect electrical systems.
- Remove the powerhead from the midsection.
- Disassemble the engine block to access the crankshaft assembly.
- Carefully remove the connecting rod cap on the corresponding piston.
- Press out the old bearing from the connecting rod and press in the new one, ensuring correct orientation.
- Lubricate the new bearing and crankshaft journal with assembly lube.
- Reassemble the connecting rod, torquing bolts to the manufacturer's specification.
- Reassemble the engine, replacing all gaskets and seals as needed.
Troubleshooting & FAQ
What specific engines does this bearing fit?
This bearing is designed for Yamaha 2-Stroke 5–8 HP models, specifically the E8D, 6B, and 8B series. It also cross-references to Mariner models using part number 31-94769M. Always verify compatibility with your engine's part number or service manual.
How can I be sure this is the correct part for my motor?
The most reliable method is to compare the part number stamped on your old bearing or listed in your engine's official parts diagram with the numbers provided here (93310-418U0-00, 93310-41809-00, or Mariner 31-94769M). Also, check the dimensions (18 × 24 × 12 mm) against your original part.
What are the signs of a failing connecting rod bearing?
Common symptoms include a knocking or ticking sound from the engine that increases with RPM, loss of power, reduced oil pressure (if applicable), and potentially metal shavings found in the engine oil. Immediate inspection is required to prevent catastrophic engine failure.
Is this bearing for the crankshaft main journal or the connecting rod?
This is a connecting rod bearing, also known as a big-end bearing. It is installed where the connecting rod attaches to the crankshaft.
What is the difference between part numbers 93310-418U0 and 93310-41809?
These part numbers typically indicate superseded versions, where one is an older revision of the other. For fit and function in the specified models, they are considered interchangeable. However, we cannot confirm if there are minor, non-functional dimensional or material differences between original OEM versions.
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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