Inner Forward Gear Bearing – Fits Yamaha 75-130 HP (Replaces 93315-425U7-00)
Inner Forward Gear Bearing – Fits Yamaha 75-130 HP (Replaces 93315-425U7-00) 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
Inner Forward Gear Bearing – Fits Yamaha 75-130 HP (Replaces 93315-...
Product Details
This is an aftermarket Inner Forward Gear Bearing – Fits Yamaha 75-130 HP (Replaces 93315-425U7-00), designed for a range of Yamaha outboard motors. It covers 4-stroke models from 75 HP to 115 HP (2000–2020) and 2-stroke models from 115 HP to 130 HP (1984–2005).
This component serves as a direct cross-reference for Yamaha part 93315-425U7-00, EMP 31-07654, and Red Rhino YA-B334.
- Installation Location: Internal Forward Gear
- Housing Material: Steel
- Application: Critical for Yamaha outboard lower unit gearcase function
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 93315-425U7-00 |
| EMP | 31-07654 |
| Red Rhino | YA-B334 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha engines, this bearing is used in various V4, F-series, and other models as a key gearcase component.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | V4 Engines | 115–130 | 2-Stroke | 1984–2005 | 93315-425U7-00 | Inner forward gear bearing |
| Yamaha | F75 | 75 | 4-Stroke | 2017–2020 | 93315-425U7-00 | |
| Yamaha | F90 | 90 | 4-Stroke | 2016–2020 | 93315-425U7-00 | |
| Yamaha | F115 | 115 | 4-Stroke | 2000–2020 | 93315-425U7-00 | |
| Yamaha | 115B/C/CETO/TXRZ/TLRA | 115 | 2-Stroke | 1984–2005 | 93315-425U7-00 | Gearcase component |
| Yamaha | 130BETO/TLRA/TLRZ | 130 | 2-Stroke | 1988–2004 | 93315-425U7-00 | Gearcase component |
Technical Specs
- Product Type
- Needle Bearing
- Installation
- Internal Forward Gear
- Housing Material
- Steel
- Dimensions
- 13.5 x 9.0 x 2.5
- Other Technical Attributes
- Forward gear bearing for Yamaha outboard lower units
What’s in the Box
- 1 x Needle Bearing (93315-425U7-00)
Installation Notes
- Drain the gearcase lubricant completely from the lower unit.
- Disassemble the lower unit to access the forward gear and propshaft assembly. This may require specialized tools.
- Carefully remove the old forward gear bearing, noting its orientation.
- Thoroughly clean the bearing carrier and surrounding area of any debris or old lubricant.
- Press the new bearing into place using a suitable bearing driver. Do not use a hammer directly on the bearing.
- Inspect all related seals and O-rings, replacing them as necessary.
- Reassemble the gearcase components according to the manufacturer's service manual specifications.
- Refill the lower unit with the correct type and amount of marine gear lubricant before operation.
Troubleshooting & FAQ
How do I know if my forward gear bearing is failing?
Common signs of a failing forward gear bearing include a grinding or whining noise from the lower unit (especially when in forward gear), excessive metal shavings on the magnetic drain plug, or difficulty shifting. A complete failure can cause the engine to lock up in gear.
Can I replace just this bearing, or should I do a full rebuild?
While you can replace just the failing bearing, it is best practice to inspect all related bearings, gears, and seals during disassembly. If other components show signs of wear, a more comprehensive rebuild is recommended to ensure long-term reliability.
Is any special grease required for installation?
Yes, always use a high-quality marine-grade grease on the bearing and related components during assembly to prevent corrosion and ensure smooth operation. Follow the recommendations in your engine's service manual.
Will this bearing fit models outside the listed year ranges?
We can only guarantee fitment for the engine models and years explicitly listed. Using the part on other models is not recommended, as even minor differences in gearcase design can lead to improper fit and premature failure.
What is the difference between an OEM and an aftermarket part?
This listing is for an aftermarket replacement, not an original equipment manufacturer (OEM) part. It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 certified facility, with batch inspections for consistency.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free. Expedited options, where available, will appear at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against 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 quality control.
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