Exhaust Inner Cover Gasket – Fits Yamaha WaveRunner/WaveJammer 500 (Replaces 689-41112-A0-00, 689-41112-00-00)
Exhaust Inner Cover Gasket – Fits Yamaha WaveRunner/WaveJammer 500 (Replaces 689-41112-A0-00, 689-41112-00-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Exhaust Inner Cover Gasket – Fits Yamaha WaveRunner/WaveJammer 500 ...
Product Details
This aftermarket Exhaust Inner Cover Gasket provides a reliable seal for the exhaust system on Yamaha 500cc 2-stroke personal watercraft engines, including WaveRunner and WaveJammer models produced from 1987 to 1990.
It serves as a direct replacement for Yamaha OEM part numbers 689-41112-A0-00 and 689-41112-00-00, and interchanges with WSM part 007-458.
- Engineered for a direct fit, ensuring proper installation.
- Designed for use in gasoline-powered PWC engines.
- Specifically made for the inner exhaust cover application.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 689-41112-A0-00 | Supersedes 689-41112-00-00 |
| Yamaha | 689-41112-00-00 | Superseded by 689-41112-A0-00 |
| WSM | 007-458 | Aftermarket Interchange |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha Personal Watercraft: This gasket is designed for the 500cc engine platform used in the models listed below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | Wave Jammer 500 | 500cc | 2-Stroke | 1987–1990 | 689-41112-A0-00 |
| Yamaha | Wave Runner 500 | 500cc | 2-Stroke | 1987–1990 | 689-41112-A0-00 |
Technical Specs
- Product Type
- Exhaust Inner Cover Gasket
- Installation
- Direct fit replacement
- Fuel Type
- For use with gasoline engines
- Dimensions
- 25.56 in (L) x 14.5 in (W) x 0.2 in (H)
- Other Technical Attributes
- Inner exhaust cover application
What’s in the Box
- 1 x Exhaust Inner Cover Gasket
Installation Notes
- Ensure the engine is completely cool and disconnect the battery for safety.
- Gain access to the inner exhaust cover. This may require removing other components.
- Carefully unbolt and remove the exhaust cover.
- Remove the old gasket and meticulously clean both the cover and engine mating surfaces. All old gasket material and residue must be removed for a proper seal.
- Position the new gasket correctly. Ensure all bolt holes align perfectly.
- Reinstall the exhaust cover, tightening the bolts in a crisscross pattern to the manufacturer-specified torque values.
- Reconnect any removed components and the battery.
- Start the engine and carefully inspect for any exhaust or water leaks around the newly installed gasket.
Troubleshooting & FAQ
How do I know if this gasket fits my WaveRunner?
This gasket is specifically for Yamaha WaveRunner 500 and WaveJammer 500 models from 1987–1990. Please verify your model and year using the compatibility table. Cross-reference your existing part number with Yamaha 689-41112-A0-00 or 689-41112-00-00.
What are the signs of a failed exhaust inner cover gasket?
Symptoms of a faulty gasket include visible water leaks around the exhaust cover, an audible exhaust leak (a hissing or ticking sound from the engine bay), loss of engine power, or overheating due to water entering the engine compartment.
What's the difference between part 689-41112-A0-00 and 689-41112-00-00?
The "A0-00" suffix indicates a revision or update by the original manufacturer to the original "00-00" part. The revised part is fully backward-compatible and is the currently specified replacement.
Do I need to use sealant with this gasket?
Generally, this type of gasket is designed to be installed dry. Applying sealants can sometimes interfere with a proper seal unless specified by the service manual. For best results, follow the torque specifications on clean, dry surfaces.
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.
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