Upper Main Bearing – Fits Yamaha Outboard 60–70 HP (Replaces 93311-636U6-00)
Upper Main Bearing – Fits Yamaha Outboard 60–70 HP (Replaces 93311-636U6-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Upper Main Bearing – Fits Yamaha Outboard 60–70 HP (Replaces 93311-...
Product Details
This Upper Main Bearing – Fits Yamaha Outboard 60–70 HP (Replaces 93311-636U6-00) is an essential internal engine component for specific Yamaha 2-stroke outboards. It is designed for engines in the 60–70 HP range manufactured from 1984 and later, including popular models like the 70ETLJ, 70ETLH, 70ETLK, and various 60/70 TLR versions.
It serves as a direct replacement for Yamaha part number 93311-636U6-00 and aftermarket equivalents such as SAIL MARINE 93311-636U6-00.
- Installation as an internal engine component requires engine disassembly.
- Engineered as a needle roller bearing for reliable crankshaft performance.
- The package includes one upper main bearing.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 93311-636U6-00 |
| SAIL MARINE | 93311-636U6-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is designed for select Yamaha 2-stroke outboard motors produced from 1984 onwards.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 70ETLN | 70 | 2-Stroke | 1984 | 93311-636U6-00 | Crank & Piston |
| Yamaha | 70ETLK | 70 | 2-Stroke | 1985 | 93311-636U6-00 | Crank & Piston |
| Yamaha | 70ETLJ | 70 | 2-Stroke | 1986 | 93311-636U6-00 | Crank & Piston |
| Yamaha | 70ETLH | 70 | 2-Stroke | 1987 | 93311-636U6-00 | Crank & Piston |
| Yamaha | 70ETLG | 70 | 2-Stroke | 1988 | 93311-636U6-00 | Crank & Piston |
| Yamaha | 70ETLF | 70 | 2-Stroke | 1989 | 93311-636U6-00 | Crank & Piston |
| Yamaha | 70ETLD, 70ETLDA | 70 | 2-Stroke | 1990 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRP | 70 | 2-Stroke | 1991 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | P60TLHP | 60 | 2-Stroke | 1991 | 93311-636U6-00 | Crank & Piston |
| Yamaha | 70TLRQ | 70 | 2-Stroke | 1992 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | P60TLHQ | 60 | 2-Stroke | 1992 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRR | 70 | 2-Stroke | 1993 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | P60TLHR | 60 | 2-Stroke | 1993 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRS | 70 | 2-Stroke | 1994 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | P60TLHS | 60 | 2-Stroke | 1994 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRT | 70 | 2-Stroke | 1995 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | P60TLHT, E60MLHT | 60 | 2-Stroke | 1995 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRU | 70 | 2-Stroke | 1996 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | P60TLHU, C60TLRU, C60ELRU | 60 | 2-Stroke | 1996 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRV | 70 | 2-Stroke | 1997 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | P60TLHV, E60MLHV, C60TLRV | 60 | 2-Stroke | 1997 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRW | 70 | 2-Stroke | 1998 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | P60TLHW, E60MLHW, C60TLRW | 60 | 2-Stroke | 1998 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRX | 70 | 2-Stroke | 1999 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | P60TLHX, E60MLHX, C60TLRX | 60 | 2-Stroke | 1999 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRY, C70TLRY | 70 | 2-Stroke | 2000 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | C60TLRY, E60MLHY | 60 | 2-Stroke | 2000 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRZ, C70TLRZ | 70 | 2-Stroke | 2001 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 60TLRZ, C60TLRZ | 60 | 2-Stroke | 2001 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRA | 70 | 2-Stroke | 2002 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 60TLRA | 60 | 2-Stroke | 2002 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRB | 70 | 2-Stroke | 2003 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 60TLRB | 60 | 2-Stroke | 2003 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRC, 70TLRNC | 70 | 2-Stroke | 2004 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 60TLRC, 60TLRNC | 60 | 2-Stroke | 2004 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLRD | 70 | 2-Stroke | 2005 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 60TLRD | 60 | 2-Stroke | 2005 | 93311-636U6-00 | Crankshaft Piston |
| Yamaha | 70TLR | 70 | 2-Stroke | 2006 and later | 93311-636U6-00 | Multiple models with various suffixes |
Technical Specs
- Product Type
- Upper Main Crankshaft Bearing
- Installation
- Internal Engine Component
- Housing Material
- Steel/Metal
- Weight
- ~264 g (0.58 lb)
- Dimensions
- 5.0" L x 6.0" W x 6.0" H
- Other Technical Attributes
- Needle Roller Bearing Type
What’s in the Box
- 1 x Bearing, Upper Main (93311-636U6-00)
Installation Notes
- Disconnect the battery and all electrical connections to the engine.
- Drain the engine oil and coolant completely to prevent spills.
- Carefully disassemble the powerhead and engine block to access the crankshaft.
- Remove the old upper main bearing, noting its orientation.
- Thoroughly clean the bearing seat and surrounding surfaces of any debris or oil residue.
- Lubricate the new bearing with fresh 2-stroke engine oil before installation.
- Press the new bearing into place, ensuring it is properly seated.
- Reassemble the crankshaft, engine block, and powerhead according to manufacturer specifications.
- Refill the engine with the correct grade of oil and coolant.
- Reconnect the battery and test the engine at low RPM, listening for any unusual noises.
Troubleshooting & FAQ
How do I know if my upper main bearing is failing?
Common signs of a failing main bearing include a deep rotational grinding or knocking noise from the engine, excessive vibration under load, or the presence of fine metal shavings in the engine oil upon inspection.
Does this bearing fit 4-stroke Yamaha engines?
No, this bearing is specifically engineered for the 2-stroke Yamaha engine models listed in the compatibility table. It is not suitable for 4-stroke applications.
Is this for the upper or lower crankshaft position?
This part is the upper main crankshaft bearing. It is critical to use the correct bearing for each specific position on the crankshaft.
What are the signs of incorrect installation?
Incorrect installation can lead to immediate engine noise, overheating, or catastrophic engine failure. It's crucial that the bearing is pressed in evenly and fully seated in its housing.
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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