Crankshaft Bearing – Fits Yamaha 48-55 HP 2-Stroke Outboard (Replaces 93311-632U1, 93311-83219, 93311-832U4)
Crankshaft Bearing – Fits Yamaha 48-55 HP 2-Stroke Outboard (Replaces 93311-632U1, 93311-83219, 93311-832U4) 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
Crankshaft Bearing – Fits Yamaha 48-55 HP 2-Stroke Outboard (Replac...
Product Details
This aftermarket Crankshaft Bearing – Fits Yamaha 48-55 HP 2-Stroke Outboard (Replaces 93311-632U1, 93311-83219, 93311-832U4) is an essential component for maintaining engine integrity. It is designed for Yamaha 48-55 HP 2-Stroke outboard engines manufactured between 1989 and 2000, including E48C/CMH, 55B/BM/BET, E55C/CMH, 55ED, and 55ET models.
This part provides a direct interchange for Yamaha OEM part numbers 93311-632U1, 93311-63223, 93311-832U4, and 93311-83219, as well as aftermarket references AM93311632U1 and AM93311832U4.
- Installation Method: Press-fit
- Diagram Location: Position #48/51 on engine schematics
- Package includes one bearing
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 93311-632U1 |
| Yamaha | 93311-63223 |
| Yamaha | 93311-832U4 |
| Yamaha | 93311-83219 |
| Aftermarket | AM93311632U1 |
| Aftermarket | AM93311832U4 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This bearing is designed for a range of Yamaha 48 HP and 55 HP 2-stroke outboard motors produced from 1989 through 2000.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | C55ELRP | 55 | 2-Stroke | 1991 | 93311-632U1 | Crankcase - Cylinder |
| Yamaha | C55ELRQ | 55 | 2-Stroke | 1992 | 93311-632U1 | Crankcase - Cylinder |
| Yamaha | C55ELRR | 55 | 2-Stroke | 1993 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | C55ELRS | 55 | 2-Stroke | 1994 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | C55ELRT | 55 | 2-Stroke | 1995 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | C55TLRR | 55 | 2-Stroke | 1993 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | C55TLRS | 55 | 2-Stroke | 1994 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | C55TLRT | 55 | 2-Stroke | 1995 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | CV55ELD | 55 | 2-Stroke | 1990 | 93311-632U1 | Crankcase - Cylinder |
| Yamaha | CV55ELF | 55 | 2-Stroke | 1989 | 93311-632U1 | Crankcase - Cylinder |
| Yamaha | E48MLHT | 48 | 2-Stroke | 1995 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | E48MLHU | 48 | 2-Stroke | 1996 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | E48MLHV | 48 | 2-Stroke | 1997 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | E48MLHW | 48 | 2-Stroke | 1998 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | E48MLHX | 48 | 2-Stroke | 1999 | 93311-632U1 | Cylinder Crankcase |
| Yamaha | E48MLHY | 48 | 2-Stroke | 2000 | 93311-632U1 | Cylinder Crankcase |
Technical Specs
- Product Type
- Crankshaft Needle Bearing
- Installation
- Press-fit
- Housing Material
- Metal
- Housing Color
- Metallochrome
- Dimensions
- Height: 6.0; Width: 5.0; Length: 6.0
- Weight
- 0.03 kg (0.066 lb)
- Other Technical Attributes
- Located at position #48/51 on parts diagrams
What’s in the Box
- 1 x Bearing (replaces 93311-632U1/93311-832U4)
Installation Notes
- Disconnect the battery and ensure the outboard engine is securely positioned.
- Following your engine's service manual, disassemble components to access the crankshaft.
- Use a suitable bearing puller to carefully extract the old crankshaft bearing from its housing.
- Thoroughly clean the housing and shaft, removing any old lubricant, dirt, or metal shavings.
- Apply a thin layer of assembly lube or clean engine oil to the new bearing and its seat.
- Using a hydraulic press or a correctly sized bearing driver, press the new bearing in evenly until it is fully seated. Do not use a hammer directly on the bearing.
- Reassemble all engine components in the reverse order of disassembly, torquing fasteners to manufacturer specifications.
Troubleshooting & FAQ
How do I identify a failing crankshaft bearing?
Common signs of a worn crankshaft bearing include a deep rumbling or grinding noise from the engine block, increased engine vibration, or the presence of metallic particles in the engine oil. You may also be able to detect excessive side-to-side play in the crankshaft.
Is this bearing for a specific crankshaft position?
Yes, this bearing is specified for position #48 or #51 on most compatible Yamaha engine diagrams. It is critical to consult your specific model's service manual to confirm the exact location and part number before ordering.
What is the difference between part numbers 93311-632U1 and 93311-832U4?
These are official, interchangeable part numbers from Yamaha. Our single aftermarket part is a direct replacement for both, along with other superseded numbers like 93311-63223 and 93311-83219, offering broad compatibility.
Can I install this bearing myself?
This is a press-fit component requiring specialized tools, such as a bearing press and pullers, for proper installation. Incorrect installation can damage the bearing, crankshaft, or engine block. Professional installation is highly recommended for reliability and safety.
Why is my engine model listed but the part looks different?
Manufacturers sometimes make mid-year changes. Always compare the images and specifications of this part to your original component before purchasing. If they do not match exactly, do not install it.
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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