Oil Seal A25x40x5 – Fits Yamaha & Parsun Outboard Motors (Replaces 93102-25090)
Oil Seal A25x40x5 – Fits Yamaha & Parsun Outboard Motors (Replaces 93102-25090) 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
Oil Seal A25x40x5 – Fits Yamaha & Parsun Outboard Motors (Repla...
Product Details
This Oil Seal A25x40x5 – Fits Yamaha & Parsun Outboard Motors (Replaces 93102-25090) is a crucial component used in various Yamaha and Parsun outboard motors, particularly within crankshaft and piston assemblies. It is designed for a precise fit in Parsun F4 series 4-stroke outboards (1998–2009) and specific Yamaha models.
This seal serves as a direct interchange for Yamaha part number 93102-25090 and Parsun part PAF4-04010004.
- Installation Location: Crankshaft/Piston Assembly
- Dimensions: 25mm Inner Diameter x 40mm Outer Diameter x 5mm Width
- Included: One oil seal per package
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 93102-25090 |
| Parsun | PAF4-04010004 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
For Parsun, this seal fits a wide range of 4 HP 4-stroke models manufactured between 1998 and 2009.
For Yamaha, this part cross-references to OEM 93102-25090. As a complete model list is not available, please verify compatibility against your engine's service manual.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Parsun | F4A | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4AMH | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4AMH(MBK) | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4AMHL | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4AMHS | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MH | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MLH | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MLHB | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MLHC | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MLHD | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MLHE | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MLHF | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MLHG | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MSH | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MSHA | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MSHC | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MSHD | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MSHE | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MSHG | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 | |
| Parsun | F4MSHZ | 4 | 4-Stroke | 1998–2009 | PAF4-04010004 |
Technical Specs
- Product Type
- Oil Seal
- Installation
- Crankshaft/Piston Assembly
- Dimensions
- A25x40x5 mm (Inner Diameter 25mm, Outer Diameter 40mm, Width 5mm)
- Weight
- 20g (0.044 lb)
What’s in the Box
- 1 x Oil Seal (Replaces PAF4-04010004 / 93102-25090)
Installation Notes
- Engine OFF: Ensure the outboard motor is completely off and the battery is disconnected.
- Access Assembly: Depending on your motor, remove any cowlings or components necessary to access the crankshaft assembly where the old seal is located.
- Remove Old Seal: Carefully pry out the old, worn seal using a seal puller or flat-head screwdriver. Take care not to scratch or damage the metal housing.
- Clean the Surface: Thoroughly clean the seal housing to remove any old sealant, grease, or debris. A clean surface ensures a proper fit.
- Lubricate New Seal: Lightly lubricate the inner and outer edges of the new oil seal with fresh marine grease. This prevents damage during installation.
- Install New Seal: Press the new seal into place squarely and evenly. Use a seal driver or a socket with a matching outer diameter to gently tap it in until it is fully seated.
- Reassemble: Reinstall all components in the reverse order of removal and reconnect the battery.
Troubleshooting & FAQ
How do I know if my oil seal is failing?
The most common sign of a failing crankshaft or piston oil seal is an active oil leak from the engine block or around the crankshaft area. You may also notice a drop in oil pressure or oil contaminating other parts of the engine.
What is the primary function of this oil seal?
This seal is designed to prevent lubricating oil from leaking out of the crankshaft assembly while also stopping contaminants like water and dirt from entering, ensuring proper engine lubrication and function.
Can this seal be used for both Yamaha and Parsun models?
Yes, this part is manufactured to serve as a direct replacement for both Parsun part PAF4-04010004 and Yamaha part 93102-25090. Always confirm your specific model is listed as compatible.
Does installation require special tools?
While basic hand tools are sufficient for disassembly, a seal puller for removal and a seal driver (or appropriately sized socket) for installation are highly recommended to prevent damage to the seal or engine housing.
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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