Propeller Shaft Oil Seal – Fits Yamaha 115-300 HP (Replaces 93101-30M17-00, 18-0266, 9-76422)
Propeller Shaft Oil Seal – Fits Yamaha 115-300 HP (Replaces 93101-30M17-00, 18-0266, 9-76422) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Propeller Shaft Oil Seal – Fits Yamaha 115-300 HP (Replaces 93101-30M17-00, 18-0266, 9-76422) is backordered and will ship as soon as it is back in stock.
Product Details
This high-quality aftermarket Propeller Shaft Oil Seal is engineered for Yamaha Outboard motors, specifically fitting a wide range of 115-300 HP V4 and V6 engines, including both 2-Stroke and 4-Stroke models from 1984 to the present. It serves as a crucial component for preventing water intrusion and oil leaks from the lower unit gearcase.
This part provides a direct replacement for several OEM and aftermarket part numbers, including Yamaha 93101-30M17-00, Sierra 18-0266, and Mallory 9-76422.
- Designed for installation in the lower unit gearcase assembly.
- Features a spring-loaded design for improved, consistent sealing performance.
- Constructed from durable, marine-grade CR rubber to withstand harsh saltwater and freshwater environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 93101-30M17-00 | |
| Sierra | 18-0266 | |
| Mallory | 9-76422 | |
| Mercury | 8886941 | Cross-reference requires verification |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This oil seal fits a versatile range of Yamaha outboards, from legacy 2-strokes to modern 4-stroke F-Series and VF-Series engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | Outboard V4 | 115, 130 | 2-Stroke | 1984–Current | 93101-30M17-00 |
| Yamaha | Outboard V4 | 150 | 2-Stroke | 1984–Current | 93101-30M17-00 |
| Yamaha | Outboard V6 | 175, 200, 220, 225 | 2-Stroke | 1984–Current | 93101-30M17-00 |
| Yamaha | Outboard V6 | 250, 300 | 2-Stroke & 4-Stroke | 1984–Current | 93101-30M17-00 |
| Yamaha | F-Series V4/V6 | 115-300 | 4-Stroke | Compatible Models | 93101-30M17-00 |
| Yamaha | VF-Series | 115, 150, 200, 225, 250 | 4-Stroke | Compatible Models | 93101-30M17-00 |
Technical Specs
- Product Type
- Propeller Shaft Oil Seal
- Installation Location
- Lower Unit / Gearcase
- Dimensions
- 45.25mm OD × 28.5mm ID × 7mm Width
- Housing Material
- Marine Grade CR Rubber
- Design
- Spring-loaded for improved sealing
What’s in the Box
- 2 x Propeller Shaft Oil Seal (93101-30M17-00)
Installation Notes
- Drain the gearcase lubricant completely from the lower unit.
- Remove the propeller, thrust washer, and any related hardware.
- Unbolt and carefully extract the bearing carrier housing from the gearcase.
- Note the orientation of the old seals before removal.
- Use a dedicated seal puller to remove the old seals, taking care not to scratch the housing.
- Thoroughly clean the seal seating area inside the housing.
- Lightly grease the outer surface of the new seal and press it into the housing squarely using a correctly sized seal driver or socket.
- Reinstall the bearing carrier housing with new O-rings/gaskets as needed, and torque bolts to manufacturer specs.
- Reinstall the propeller and refill the gearcase with the correct marine gear lubricant before operation.
Troubleshooting & FAQ
How can I tell if my propeller shaft seal is failing?
The most common signs of a failed propeller shaft seal are milky, creamy, or cloudy gear lube (which indicates water has mixed with the oil) or a visible gear oil leak around the propeller shaft area of your lower unit.
Will this seal fit my specific Yamaha F150 from 2015?
Yes, this seal is designed for a broad range of Yamaha 115-300 HP engines from 1984 onwards, including the F-Series. For absolute certainty, please consult the Engine & Model Compatibility table and verify the OEM part number 93101-30M17-00 is correct for your motor.
What is the recommended replacement interval for these seals?
Propeller shaft seals should be inspected during any routine lower unit service. It is recommended to replace them every 1-3 years as preventative maintenance, or immediately if you notice any signs of water intrusion or oil leaks.
Why are there two seals included in the package?
Many Yamaha lower unit designs utilize two propeller shaft seals installed back-to-back in the bearing carrier. This package includes a set of two seals to complete the job correctly.
Is this an OEM Yamaha part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials, manufactured in an ISO 9002 facility, and batch-inspected for consistency and quality.
How fast is shipping?
We ship worldwide quickly—typical transit is 5–15 days for most regions. Standard shipping is free, and expedited options may appear at checkout where available.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If an issue arises, contact our support team with your order details. Returns are accepted within our standard store window for items that are unused and in their original condition.
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 part, not an original equipment manufacturer (OEM) component.
- Professional installation is strongly recommended for safety, proper function, and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world saltwater and freshwater conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — By working directly with our manufacturing partners, we provide fair pricing without compromising on materials or quality control.
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