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8PCS Valve Stem Seal 51Y-12119-00-00 | Waverunner & Outboard
8PCS Valve Stem Seal 51Y-12119-00-00 | Waverunner & Outboard
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8-Piece Metal Valve Stem Seal Set – OEM# 51Y-12119-00-00
Keep your Waverunner, sport boat, or outboard motor running at peak performance with this precision-engineered set of 8 metal valve stem seals. Designed as a direct replacement for OEM part number 51Y-12119-00-00, these seals manage oil flow in your engine's valve train, prevent oil burning, and extend the overall life of your motor. Compatible with an extensive range of outboard engines from 2.5 HP to 425 HP across multiple cylinder configurations.
Key Features
- Wide Compatibility: Fits Waverunner sport boats, outboard motors from 2.5 to 425 horsepower across 1-, 2-, 3-, 4-, 6-, and 8-cylinder 4-stroke engines (1985–2024).
- Critical Engine Component: Seals the valve stem to regulate oil lubrication in the valve train, reducing oil consumption and maintaining optimal engine performance.
- Durable Metal Construction: Made from rugged metal material engineered to withstand harsh marine environments, salt spray, heat, and constant mechanical stress.
- OEM-Spec Fitment: Manufactured to match OEM specifications for a reliable, leak-free fit — no modifications needed.
- DIY-Friendly Installation: Straightforward replacement process designed to minimize downtime and get you back on the water fast.
Specifications
- OEM Part Number: 51Y-12119-00-00
- Item Type: Valve Stem Seal
- Material: Metal
- Quantity: 8 pieces per set
- Outer Diameter: Approx. 11.0 mm / 0.43 in
- Minimum Inner Diameter: Approx. 4.5 mm / 0.18 in
- Maximum Inner Diameter: Approx. 8.2 mm / 0.32 in
- Country of Origin: Made in China
Fitment Guide
| Horsepower | Cylinders / Type | Seals Needed | Years |
|---|---|---|---|
| 2.5 HP | 1 Cyl 4-Stroke | 2 | 2004–2013 |
| 4 HP | 1 Cyl 4-Stroke | 2 | 1999–2006 |
| 6 HP | 1 Cyl 4-Stroke | 2 | 2011–2012 |
| 6 HP | 2 Cyl 4-Stroke | 4 | 2001–2010 |
| 8 HP | 2 Cyl 4-Stroke | 4 | 2001–2013 |
| 9.9 HP | 2 Cyl 4-Stroke | 4 | 1985–2022 |
| 15 HP | 2 Cyl 4-Stroke | 4 | 2001–2022 |
| 20 HP | 2 Cyl 4-Stroke | 4 | 2008–2022 |
| 25 HP | 2 Cyl 4-Stroke | 4 | 1998–2022 |
| 40 HP | 3 Cyl 4-Stroke | 6 | 2001–2010, 2015–2022 |
| 40 HP Jet | 3 Cyl 4-Stroke | 6 | 2002–2022 |
| 50 HP | 4 Cyl 4-Stroke | 8 | 1999–2022 |
| 60 HP | 4 Cyl 4-Stroke | 8 | 2002–2022 |
| 70 HP | 4 Cyl 4-Stroke | 16 | 2012–2022 |
| 115 HP | 4 Cyl 4-Stroke | 16 | 2015–2022 |
| 150 HP | 4 Cyl 4-Stroke | 16 | 2013–2022 |
| 200 HP | 4 Cyl 4-Stroke | 16 | 2012–2022 |
| 200 HP | 6 Cyl 4-Stroke | 24 | 2012–2022 |
| 225 HP | 6 Cyl 4-Stroke | 24 | 2012–2022 |
| 250 HP | 6 Cyl 4-Stroke | 24 | 2011–2022 |
| 300 HP | 6 Cyl 4-Stroke | 24 | 2010–2022 |
| 350 HP | 8 Cyl 4-Stroke | 32 | 2012–2019 |
| 425 HP | 8 Cyl 4-Stroke | 32 | 2018–2022 |
| Waverunner / Sport Boat | 1.8L / 1900 Engines | 16 | 2008–2024 |
Note: Please verify the OEM part number against your engine's documentation before purchasing. Fitment information is provided as a reference guide.
Package Contents
- 8 × Metal Valve Stem Seals (OEM# 51Y-12119-00-00)
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Authoritative Resource
For safe boating maintenance practices and guidelines, visit the U.S. Consumer Product Safety Commission (CPSC) for product safety standards relevant to marine equipment.
Learn more: Kawasaki Motors
Frequently Asked Questions
Q: What OEM part number do these valve stem seals replace?
A: These seals are a direct replacement for OEM part number 51Y-12119-00-00. Always confirm this number against your engine's service manual or parts list before ordering.
Q: How many valve stem seals do I need for my outboard engine?
A: The number of seals required depends on your engine's cylinder count. As a general rule: 1-cylinder engines need 2 seals, 2-cylinder engines need 4 seals, 3-cylinder engines need 6 seals, 4-cylinder engines need 8–16 seals (depending on if it's DOHC), 6-cylinder engines need 24, and 8-cylinder engines need 32. Refer to the fitment table above for your specific horsepower and year.
Q: Are these valve stem seals compatible with Waverunner personal watercraft?
A: Yes. These seals are compatible with Waverunner and sport boat applications using the 1.8L engine (2008–2023) and the 2024 1900 engine. A set of 16 seals is typically required for these applications.
Q: What material are these valve stem seals made from?
A: These valve stem seals are constructed from durable metal, designed to withstand the demanding conditions of marine engines including heat, oil exposure, and mechanical stress in saltwater environments.
Q: Can I install these valve stem seals myself without a mechanic?
A: These seals are designed for straightforward installation and can be replaced without professional assistance if you have basic mechanical experience and the appropriate tools. However, if you're unsure, consulting a certified marine mechanic is always recommended.
