Lower Crankshaft Oil Seal – Fits Yamaha 200-300HP Outboards (Replaces 93104-22M07-00)
Lower Crankshaft Oil Seal – Fits Yamaha 200-300HP Outboards (Replaces 93104-22M07-00) 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
Lower Crankshaft Oil Seal – Fits Yamaha 200-300HP Outboards (Replac...
Product Details
This high-quality Lower Crankshaft Oil Seal is engineered for a wide range of Yamaha 200–300HP outboards. It fits numerous Yamaha 2-stroke V, VX, VZ, Z, LZ, S, SX, L, and LX models from 1990–2010, as well as Yamaha 4-stroke F/FL/LF/VF series engines from 2010 and newer.
This part serves as a direct cross-reference for Yamaha 93104-22M07-00, Sierra 18-2091, GLM 85234, and Mallory 551-18.
- Installs in the lower crankshaft housing to prevent oil leaks.
- Engineered as an SO-Type oil seal for a precise, reliable fit.
- Includes one oil seal required for a standard replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 93104-22M07-00 |
| Yamaha | 9310422M0700 |
| Sierra | 18-2091 |
| GLM | 85234 |
| Mallory | 551-18 |
Engine & Model Compatibility
Confirm your engine model and year in the tables below.
Compatibility is confirmed for the following Yamaha 2-stroke and 4-stroke outboard models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 225 | 225 | 2-Stroke | 1994–1995 | 93104-22M07-00 | |
| Yamaha | 250 | 250 | 2-Stroke | 1990–1995 | 93104-22M07-00 | |
| Yamaha | L225 | 225 | 2-Stroke | 1995–1999 | 93104-22M07-00 | |
| Yamaha | L250 | 250 | 2-Stroke | 1990–1999 | 93104-22M07-00 | |
| Yamaha | LX225 | 225 | 2-Stroke | 2000–2003 | 93104-22M07-00 | |
| Yamaha | LX250 | 250 | 2-Stroke | 2000–2003 | 93104-22M07-00 | |
| Yamaha | LZ250 | 250 | 2-Stroke | 2003–2006 | 93104-22M07-00 | |
| Yamaha | LZ300 | 300 | 2-Stroke | 2004–2007 | 93104-22M07-00 | |
| Yamaha | S225 | 225 | 2-Stroke | 1996–1999 | 93104-22M07-00 | |
| Yamaha | S250 | 250 | 2-Stroke | 1996–1999 | 93104-22M07-00 | |
| Yamaha | SX225 | 225 | 2-Stroke | 2000–2003 | 93104-22M07-00 | |
| Yamaha | SX250 | 250 | 2-Stroke | 2000–2003 | 93104-22M07-00 | |
| Yamaha | V200 | 200 | 2-Stroke | 1998–1999 | 93104-22M07-00 | |
| Yamaha | V225 | 225 | 2-Stroke | 1998–1999 | 93104-22M07-00 | |
| Yamaha | VX200 | 200 | 2-Stroke | 2000–2005 | 93104-22M07-00 | |
| Yamaha | VX225 | 225 | 2-Stroke | 2000–2004 | 93104-22M07-00 | |
| Yamaha | VX250 | 250 | 2-Stroke | 2002–2004 | 93104-22M07-00 | |
| Yamaha | VZ200 | 200 | 2-Stroke | 2005–2010 | 93104-22M07-00 | |
| Yamaha | VZ225 | 225 | 2-Stroke | 2003–2010 | 93104-22M07-00 | |
| Yamaha | VZ250 | 250 | 2-Stroke | 2003–2010 | 93104-22M07-00 | |
| Yamaha | VZ300 | 300 | 2-Stroke | 2004–2010 | 93104-22M07-00 | |
| Yamaha | Z250 | 250 | 2-Stroke | 2003–2006 | 93104-22M07-00 | |
| Yamaha | Z300 | 300 | 2-Stroke | 2004–2007 | 93104-22M07-00 |
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F225 | 225 | 4-Stroke | 2010–Up | 93104-22M07-00 | |
| Yamaha | F250 | 250 | 4-Stroke | 2010–Up | 93104-22M07-00 | |
| Yamaha | F300 | 300 | 4-Stroke | 2010–Up | 93104-22M07-00 | |
| Yamaha | FL250 | 250 | 4-Stroke | 2011 | 93104-22M07-00 | |
| Yamaha | FL300 | 300 | 4-Stroke | 2011, 2017 | 93104-22M07-00 | |
| Yamaha | LF225 | 225 | 4-Stroke | 2010–Up | 93104-22M07-00 | |
| Yamaha | LF250 | 250 | 4-Stroke | 2010–Up | 93104-22M07-00 | |
| Yamaha | LF300 | 300 | 4-Stroke | 2010–Up | 93104-22M07-00 | |
| Yamaha | VF250 | 250 | 4-Stroke | 2015–Up | 93104-22M07-00 |
Technical Specs
- Product Type
- Crankshaft Oil Seal
- Installation
- Lower Crankshaft
- Fitting Type
- SO-Type Oil Seal
- Dimensions
- 3.0" L x 3.0" W x 0.5" H
What’s in the Box
- 1 x Oil Seal, SO-Type (Replaces 93104-22M07-00)
Installation Notes
- Ensure the engine is off, cool, and disconnected from the power source.
- Drain the lower unit gear lube completely.
- Remove the propeller and then the lower unit assembly from the engine.
- Depending on your engine, you may need to remove the powerhead to access the lower crankshaft area.
- Carefully pry out the old oil seal using a dedicated seal puller, taking care not to scratch the crankshaft or housing surfaces.
- Thoroughly clean the seal bore to remove any residue, old sealant, or corrosion.
- Lightly lubricate the inner and outer surfaces of the new oil seal with marine-grade grease.
- Using a correctly sized seal driver or socket, press the new seal into place until it is perfectly flush and evenly seated.
- Reassemble all components (powerhead, lower unit, propeller) in the reverse order of removal.
- Refill the gearcase with the manufacturer-specified gear lube to the correct level.
- After reassembly, run the engine and carefully check for any signs of oil leaks around the seal area.
Troubleshooting & FAQ
How do I know if my lower crankshaft seal is failing?
The most common signs are a visible oil leak from the lower part of the engine cowling or a noticeable drop in engine oil level without other obvious causes. In some cases, water may enter the crankcase, causing the oil to appear milky.
What is the difference between an upper and lower crankshaft seal?
The upper seal is located at the top of the crankshaft near the flywheel, while the lower seal is located at the bottom, where the driveshaft connects. This part is specifically for the lower position. Always verify the correct part for the location you are servicing.
How often should this seal be replaced?
There is no fixed service interval for crankshaft seals. They should be inspected for leaks or damage during any major engine service (like a water pump replacement) and replaced immediately if they show signs of failure, such as hardening, cracking, or visible weeping.
Is this product an OEM part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. All our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
How fast is shipping?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free for most orders. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
Our parts are covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before ordering. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement part, not an OEM component. Brand names and part numbers are used for reference purposes only.
- Professional installation is strongly recommended for safety and to ensure proper performance. Incorrect installation can lead to engine damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.
- Fast Global Fulfillment — With free standard delivery to most regions, you can expect your parts in 5–15 days.
- Manufacturer-Direct Value — We deliver fair pricing without compromising on high-quality materials or stringent quality control.
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