Housing, Bearing – Fits Yamaha 300HP Outboard Motors (Replaces 6D0-45332-00-CA)
Housing, Bearing – Fits Yamaha 300HP Outboard Motors (Replaces 6D0-45332-00-CA) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This is a replacement Housing, Bearing – Fits Yamaha 300HP Outboard Motors (Replaces 6D0-45332-00-CA), a genuine OEM bearing housing assembly designed for the lower unit/gearcase. It is specifically engineered for Yamaha 300HP 2-Stroke outboard motors manufactured between 1990 and 2003.
This component provides a direct replacement for Yamaha OEM part numbers 6D0-45332-00-CA and 6D0-45332-00-94.
- Installation Location: Mounts in the lower unit/gearcase assembly.
- Material: Constructed from durable aluminum for corrosion resistance.
- Direct Fit: Engineered to meet or exceed original equipment specifications for a precise fit.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 6D0-45332-00-CA | Interchangeable with 6D0-45332-00-94 |
| Yamaha | 6D0-45332-00-94 | Supersedes 6D0-45332-00-CA |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 300AETO | 300 | 2-Stroke | 1990–2003 | 6D0-45332-00-CA | Also replaced by 6D0-45332-00-94 |
| Yamaha | 300AETU | 300 | 2-Stroke | 1990–2003 | 6D0-45332-00-CA | Also replaced by 6D0-45332-00-94 |
| Yamaha | 300AETX | 300 | 2-Stroke | 1990–2003 | 6D0-45332-00-CA | Also replaced by 6D0-45332-00-94 |
| Yamaha | 300AETL | 300 | 2-Stroke | 1990–2003 | 6D0-45332-00-CA | Also replaced by 6D0-45332-00-94 |
Technical Specs
- Product Type
- Bearing Housing
- Installation
- Lower Unit/Gearcase
- Housing Material
- Aluminum
- Dimensions
- 20.5" L x 12.0" W x 11.5" H
What’s in the Box
- 1 x Bearing Housing (Replaces 6D0-45332-00-CA, 6D0-45332-00-94)
Installation Notes
- Disconnect the battery cables and disable the ignition system for safety.
- Drain the gearcase lubricant completely into an approved container.
- Remove the lower unit (gearcase) from the outboard's midsection.
- Disassemble the gearcase to access the propeller shaft and bearing carrier assembly.
- Carefully remove the old bearing housing, taking note of all associated seals, O-rings, and bearings.
- Thoroughly clean all mating surfaces and inspect for any damage or wear.
- Install the new bearing housing, ensuring all seals and components are correctly seated.
- Reassemble the gearcase, using the manufacturer's specified torque values for all fasteners.
- Reinstall the lower unit onto the outboard motor.
- Refill the gearcase with the recommended marine gear lubricant to the proper level.
- Reconnect the battery, start the engine in a safe environment, and check for proper operation and leaks.
Troubleshooting & FAQ
How do I know if this bearing housing fits my engine?
This part is for Yamaha 300HP 2-Stroke outboards (1990–2003). To guarantee fitment, please verify your engine model against the compatibility table and confirm your existing part number is 6D0-45332-00-CA or 6D0-45332-00-94.
What are common signs of a failing bearing housing?
Symptoms include grinding or roaring noises from the gearcase, excessive propeller shaft vibration, or finding metal shavings in the gear lube. A damaged or cracked housing can cause catastrophic lower unit failure if not addressed.
What is the difference between part numbers 6D0-45332-00-CA and 6D0-45332-00-94?
These are official Yamaha part numbers that are functionally identical and interchangeable. The different suffixes often indicate minor revisions or packaging changes over the years. This aftermarket housing replaces both versions.
Do I need special tools for this installation?
Yes, installation typically requires a bearing puller, a press, and a torque wrench, in addition to standard mechanic's tools. Due to the precision required, professional installation is strongly recommended.
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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