Ball Bearing – Fits Yamaha 3-8 HP Outboards (Replaces 93306-204U0-00)
Ball Bearing – Fits Yamaha 3-8 HP Outboards (Replaces 93306-204U0-00) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Ball Bearing – Fits Yamaha 3-8 HP Outboards (Replaces 93306-204U0-00)
Product Details
This high-quality Ball Bearing – Fits Yamaha 3-8 HP Outboards (Replaces 93306-204U0-00) is engineered for a precise fit in various Yamaha and Mercury/Mariner 2-stroke outboard engines. It is designed for Yamaha models from 3 HP to 8 HP manufactured between 1984–2006, including the 4A, 4AC, 5C, 6C, 6D, and 8C series, and also fits select Mercury/Mariner 4-8 HP 2-stroke models.
This component serves as a direct interchange for Yamaha part numbers 93306-204U0-00 and 93306-20411-00, as well as Mercury/Mariner references 30-18859M, 30-82299M, and 18859T.
- Installs as an internal engine component within the crankshaft/crankcase assembly.
- Constructed from high-strength steel to ensure durability and reliable performance.
- Meets OEM quality standards and is manufactured in Japan.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 93306-204U0-00 |
| Yamaha | 93306-20411-00 |
| Mercury/Mariner | 30-18859M |
| Mercury/Mariner | 30-82299M |
| Mercury/Mariner | 18859T |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, this bearing fits an extensive range of 2-stroke models from 3 HP to 8 HP produced between 1984 and 2006. Please verify your specific model code and year.
For Mercury/Mariner owners, this component is compatible with select 4A, 6C/D, and 8C/8K 2-stroke models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 3G, 3LG, 3SG | 3 | 2-Stroke | 1988 | 93306-204U0-00 |
| Yamaha | 3LF, 3SF | 3 | 2-Stroke | 1989 | 93306-204U0-00 |
| Yamaha | 3LD, 3SD | 3 | 2-Stroke | 1990 | 93306-204U0-00 |
| Yamaha | 3MLHP, 3MSHP | 3 | 2-Stroke | 1991 | 93306-204U0-00 |
| Yamaha | 3MHQ, 3MLHQ, 3MSHQ | 3 | 2-Stroke | 1992 | 93306-204U0-00 |
| Yamaha | 3MLHR, 3MSHR | 3 | 2-Stroke | 1993 | 93306-204U0-00 |
| Yamaha | 3MLHS, 3MSHS | 3 | 2-Stroke | 1994 | 93306-204U0-00 |
| Yamaha | 3MHT, 3MLHT, 3MSHT | 3 | 2-Stroke | 1995 | 93306-204U0-00 |
| Yamaha | 3MLHU, 3MSHU | 3 | 2-Stroke | 1996 | 93306-204U0-00 |
| Yamaha | 3MLHV, 3MSHV | 3 | 2-Stroke | 1997 | 93306-204U0-00 |
| Yamaha | 3MHW, 3MLHW, 3MSHW | 3 | 2-Stroke | 1998 | 93306-204U0-00 |
| Yamaha | 3MHX, 3MLHX, 3MSHX | 3 | 2-Stroke | 1999 | 93306-204U0-00 |
| Yamaha | 3MHY, 3MLHY, 3MSHY | 3 | 2-Stroke | 2000 | 93306-204U0-00 |
| Yamaha | 3MSHKZ, 3MSHZ | 3 | 2-Stroke | 2001 | 93306-204U0-00 |
| Yamaha | 3MSHA | 3 | 2-Stroke | 2002 | 93306-204U0-00 |
| Yamaha | 4LN, 4SN | 4 | 2-Stroke | 1984 | 93306-204U0-00 |
| Yamaha | 4LK, 4SK | 4 | 2-Stroke | 1985 | 93306-204U0-00 |
| Yamaha | 4LJ, 4SJ | 4 | 2-Stroke | 1986 | 93306-204U0-00 |
| Yamaha | 4A, 4AC, 4AS, 4LH, 4SH | 4 | 2-Stroke | 1987 | 93306-204U0-00 |
| Yamaha | 4LG, 4SG | 4 | 2-Stroke | 1988 | 93306-204U0-00 |
| Yamaha | 4LF, 4SF | 4 | 2-Stroke | 1989 | 93306-204U0-00 |
| Yamaha | 4LD, 4SD | 4 | 2-Stroke | 1990 | 93306-204U0-00 |
| Yamaha | 4MLHP, 4MSHP | 4 | 2-Stroke | 1991 | 93306-204U0-00 |
| Yamaha | 4MHQ, 4MLHQ, 4MSHQ | 4 | 2-Stroke | 1992 | 93306-204U0-00 |
| Yamaha | 4MHR, 4MLHR, 4MSHR | 4 | 2-Stroke | 1993 | 93306-204U0-00 |
| Yamaha | 4MLHS, 4MSHS | 4 | 2-Stroke | 1994 | 93306-204U0-00 |
| Yamaha | 4MLHT, 4MSHT | 4 | 2-Stroke | 1995 | 93306-204U0-00 |
| Yamaha | 4MLHU, 4MSHU | 4 | 2-Stroke | 1996 | 93306-204U0-00 |
| Yamaha | 4MLHV, 4MSHV | 4 | 2-Stroke | 1997 | 93306-204U0-00 |
| Yamaha | 4MLHW, 4MSHW | 4 | 2-Stroke | 1998 | 93306-204U0-00 |
| Yamaha | 4MLHX, 4MSHX | 4 | 2-Stroke | 1999 | 93306-204U0-00 |
| Yamaha | 5LN, 5SN | 5 | 2-Stroke | 1984 | 93306-204U0-00 |
| Yamaha | 5LK, 5SK | 5 | 2-Stroke | 1985 | 93306-204U0-00 |
| Yamaha | 5C, 5CS | 5 | 2-Stroke | 1986–1987 | 93306-204U0-00 |
| Yamaha | 5MSHS | 5 | 2-Stroke | 1994 | 93306-204U0-00 |
| Yamaha | 5MLHT, 5MSHT | 5 | 2-Stroke | 1995 | 93306-204U0-00 |
| Yamaha | 5MLHU, 5MSHU | 5 | 2-Stroke | 1996 | 93306-204U0-00 |
| Yamaha | 5MLHV, 5MSHV | 5 | 2-Stroke | 1997 | 93306-204U0-00 |
| Yamaha | 5MLHW, 5MSHW | 5 | 2-Stroke | 1998 | 93306-204U0-00 |
| Yamaha | 5MLHX, 5MSHX | 5 | 2-Stroke | 1999 | 93306-204U0-00 |
| Yamaha | 5MLHY, 5MSHY | 5 | 2-Stroke | 2000 | 93306-204U0-00 |
| Yamaha | 5MSHKZ, 5MSHZ | 5 | 2-Stroke | 2001 | 93306-204U0-00 |
| Yamaha | 5MSHA | 5 | 2-Stroke | 2002 | 93306-204U0-00 |
| Yamaha | 6C, 6D | 6 | 2-Stroke | 1984–1989 | 93306-204U0-00 |
| Yamaha | 6LD, 6SD | 6 | 2-Stroke | 1990 | 93306-204U0-00 |
| Yamaha | 6MLHP, 6MSHP | 6 | 2-Stroke | 1991 | 93306-204U0-00 |
| Yamaha | 6MLHQ, 6MSHQ | 6 | 2-Stroke | 1992 | 93306-204U0-00 |
| Yamaha | 6MLHR, 6MSHR | 6 | 2-Stroke | 1993 | 93306-204U0-00 |
| Yamaha | 6MLHS, 6MSHS | 6 | 2-Stroke | 1994 | 93306-204U0-00 |
| Yamaha | 6MLHT, 6MSHT | 6 | 2-Stroke | 1995 | 93306-204U0-00 |
| Yamaha | 6MLHU, 6MSHU | 6 | 2-Stroke | 1996 | 93306-204U0-00 |
| Yamaha | 6MLHV, 6MSHV | 6 | 2-Stroke | 1997 | 93306-204U0-00 |
| Yamaha | 6MLHW, 6MSHW | 6 | 2-Stroke | 1998 | 93306-204U0-00 |
| Yamaha | 6MLHX, 6MSHX | 6 | 2-Stroke | 1999 | 93306-204U0-00 |
| Yamaha | 6MLHY, 6MSHY | 6 | 2-Stroke | 2000 | 93306-204U0-00 |
| Yamaha | 6MLHZ, 6MSHZ | 6 | 2-Stroke | 2001–2006 | 93306-204U0-00 |
| Yamaha | 8LN, 8SN | 8 | 2-Stroke | 1984 | 93306-204U0-00 |
| Yamaha | 8LK, 8SK | 8 | 2-Stroke | 1985 | 93306-204U0-00 |
| Yamaha | 8J, 8LJ, 8SJ | 8 | 2-Stroke | 1986 | 93306-204U0-00 |
| Yamaha | 8C, 8LH, 8SH | 8 | 2-Stroke | 1987 | 93306-204U0-00 |
| Yamaha | 8LG, 8SG | 8 | 2-Stroke | 1988 | 93306-204U0-00 |
| Yamaha | 8LF, 8SF | 8 | 2-Stroke | 1989 | 93306-204U0-00 |
| Yamaha | 8LD, 8SD | 8 | 2-Stroke | 1990 | 93306-204U0-00 |
| Yamaha | 8MLHP, 8MSHP | 8 | 2-Stroke | 1991 | 93306-204U0-00 |
| Yamaha | 8MLHQ, 8MSHQ | 8 | 2-Stroke | 1992 | 93306-204U0-00 |
| Yamaha | 8MLHR, 8MSHR | 8 | 2-Stroke | 1993 | 93306-204U0-00 |
| Yamaha | 8MLHS, 8MSHS | 8 | 2-Stroke | 1994 | 93306-204U0-00 |
| Yamaha | 8MLHT, 8MSHT | 8 | 2-Stroke | 1995 | 93306-204U0-00 |
| Yamaha | 8MLHU, 8MSHU | 8 | 2-Stroke | 1996 | 93306-204U0-00 |
| Yamaha | 8MHW, 8MLHV, 8MLHW, 8MSHV, 8MSHW | 8 | 2-Stroke | 1997–1998 | 93306-204U0-00 |
| Yamaha | 8MLHX, 8MSHX | 8 | 2-Stroke | 1999 | 93306-204U0-00 |
| Yamaha | 8MLHY, 8MSHY | 8 | 2-Stroke | 2000 | 93306-204U0-00 |
| Yamaha | 8MSHZ | 8 | 2-Stroke | 2001 | 93306-204U0-00 |
| Yamaha | 8MSHA | 8 | 2-Stroke | 2002 | 93306-204U0-00 |
| Yamaha | 8MSHB | 8 | 2-Stroke | 2003 | 93306-204U0-00 |
| Yamaha | 8MSHC | 8 | 2-Stroke | 2004 | 93306-204U0-00 |
| Yamaha | 8MSHD | 8 | 2-Stroke | 2005 | 93306-204U0-00 |
| Yamaha | 8MSH | 8 | 2-Stroke | 2006 | 93306-204U0-00 |
| Yamaha | E8D | 8 | 2-Stroke | 1997–1998 | 93306-204U0-00 |
| Yamaha | E8DMH | 8 | 2-Stroke | 1999 | 93306-204U0-00 |
Technical Specs
- Product Type
- Ball Bearing
- Installation
- Internal Engine Component
- Fuel Type
- Gasoline
- Housing Material
- Steel
- Dimensions
- 20mm ID × 42mm OD × 12mm Width
- Bearing Type
- 6204 C3
- Location
- Crankshaft/Crankcase
- OEM Quality
- Yes
- Country of Origin
- Japan
What’s in the Box
- 1 x Ball Bearing (Replaces 93306-204U0-00)
Installation Notes
- Ensure the engine is off, cool, and disconnected from the battery and fuel source.
- Drain the engine oil completely to avoid spills.
- Disassemble the engine housing and components as required to access the crankshaft.
- Carefully remove the old bearing using an appropriate bearing puller; avoid damaging the crankshaft or crankcase housing.
- Thoroughly clean the bearing seat and crankshaft surface, removing any old lubricant or debris.
- Using a bearing press, install the new bearing by applying even pressure to the outer race until it is fully seated. Do not hammer the bearing into place.
- Reassemble all engine components in the reverse order of disassembly, torquing bolts to manufacturer specifications.
- Refill the engine with the correct type and amount of oil.
- Reconnect the battery and fuel line, then test the engine at low RPM, listening for any unusual noises before resuming normal operation.
Troubleshooting & FAQ
How do I know if this bearing will fit my specific engine?
The best method is to cross-reference the part number. Check your engine's service manual or existing part for the number 93306-204U0-00. You can also review our detailed compatibility table to match your engine's brand, model, and year.
What are the signs of a failing crankshaft bearing?
Common symptoms include a rumbling, grinding, or knocking noise originating from the engine block, especially when RPMs change. Other signs are excessive engine vibration or noticeable side-to-side play in the crankshaft.
What does "6204 C3" mean?
This is a standard bearing designation. "6204" specifies the bearing's dimensions (20mm ID x 42mm OD x 12mm Width) and type. "C3" indicates that the bearing has internal clearance greater than standard, which is necessary for high-speed engine applications where thermal expansion occurs.
Can I install this bearing myself?
This part is an internal engine component, and replacing it is a complex task. It requires specialized tools like a bearing puller and press, as well as a deep understanding of engine mechanics. To prevent potential engine damage, professional installation is strongly recommended.
How often should this bearing be replaced?
There is no fixed replacement interval. This bearing should be inspected for signs of wear, spalling, or excessive noise during any major engine service or rebuild. Replace it proactively if you are already servicing the crankshaft to ensure long-term reliability.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
