Cartridge Gasket – Fits Yamaha Outboard Motors 20–30HP (Replaces 689-44324-A0-00)
Cartridge Gasket – Fits Yamaha Outboard Motors 20–30HP (Replaces 689-44324-A0-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Cartridge Gasket – Fits Yamaha Outboard Motors 20–30HP (Replaces 68...
Product Details
This Cartridge Gasket – Fits Yamaha Outboard Motors 20–30HP (Replaces 689-44324-A0-00) provides an essential seal for the water pump assembly on Yamaha 20–30HP 2-stroke outboard motors manufactured between 1984 and 1996. It fits precisely between the water pump housing and the cartridge to prevent leaks and ensure optimal cooling system performance.
This part serves as a direct cross-reference for Yamaha part numbers 689-44324-01-00 and 689-44324-A0-00, as well as aftermarket equivalents including GLM Marine 38109 and SEI Marine 95-499-02D.
- Installs between the water pump housing and internal cartridge.
- Critical component for maintaining the integrity of the engine's cooling system.
- Engineered from durable, high-quality gasket material for reliable, long-term performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 689-44324-A0-00 |
| Yamaha | 689-44324-01-00 |
| GLM Marine | 38109 |
| SEI Marine | 95-499-02D |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is designed for a specific range of Yamaha 2-stroke outboard motors rated at 20HP, 25HP, and 30HP.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 20C (6A9) | 20 | 2-Stroke | 1985–1996 | 689-44324-A0-00 | |
| Yamaha | 20C (6A90) | 20 | 2-Stroke | 1990 | 689-44324-A0-00 | |
| Yamaha | 25D (695) | 25 | 2-Stroke | 1984–1990 | 689-44324-A0-00 | |
| Yamaha | 25SK, 25LK, 25ESK, 25ELK | 25 | 2-Stroke | 1985 | 689-44324-A0-00 | |
| Yamaha | 25H | 25 | 2-Stroke | 1987 | 689-44324-A0-00 | |
| Yamaha | 25J | 25 | 2-Stroke | 1986 | 689-44324-A0-00 | |
| Yamaha | 25SN, 25LN, 25ESN, 25ELN | 25 | 2-Stroke | 1984 | 689-44324-A0-00 | |
| Yamaha | 25HK | 25 | 2-Stroke | 1993 | 689-44324-A0-00 | |
| Yamaha | C25ER(MH)R | 25 | 2-Stroke | 1993 | 689-44324-A0-00 | |
| Yamaha | C25ER(MH/EH)S | 25 | 2-Stroke | 1994 | 689-44324-A0-00 | |
| Yamaha | C25ER(MH/EH)T | 25 | 2-Stroke | 1995 | 689-44324-A0-00 | |
| Yamaha | C25ELHR | 25 | 2-Stroke | 1993 | 689-44324-A0-00 | |
| Yamaha | 30A (689) | 30 | 2-Stroke | 1985, 1990 | 689-44324-A0-00 | |
| Yamaha | 30AE (6890) | 30 | 2-Stroke | 1990–1991 | 689-44324-A0-00 | |
| Yamaha | 30ESN, 30ELN | 30 | 2-Stroke | 1984 | 689-44324-A0-00 | |
| Yamaha | 30ESK, 30ELK | 30 | 2-Stroke | 1985 | 689-44324-A0-00 | |
| Yamaha | 30J | 30 | 2-Stroke | 1986 | 689-44324-A0-00 |
Technical Specs
- Product Type
- Water Pump Cartridge Gasket
- Installation Location
- Between water pump housing and cartridge
- Housing Material
- Gasket material
- Dimensions
- 15.5 cm L x 10.5 cm W x 0.1 cm H
- Application
- Part of water pump cooling system
What’s in the Box
- 1 x Gasket, Cartridge (Replaces 689-44324-A0-00)
Installation Notes
- Ensure the engine is off, cool, and the battery is disconnected before starting.
- Access the lower unit's water pump housing. This may require removing the lower unit from the engine.
- Unscrew the bolts securing the water pump cover and housing assembly.
- Carefully lift the housing to expose the impeller, cartridge, and old gasket.
- Remove the old gasket and thoroughly clean both mating surfaces, ensuring they are free of old material or corrosion.
- Position the new gasket correctly between the cartridge and the housing.
- Reassemble the water pump housing, making sure all components are properly aligned.
- Tighten the housing bolts to the manufacturer's recommended torque specification in a star pattern.
- If the lower unit was removed, reinstall it. Reconnect the battery.
- Start the engine using a water supply (flushing muffs) and check for proper water flow from the telltale outlet and for any leaks.
Troubleshooting & FAQ
How do I know if this gasket will fit my Yamaha engine?
This gasket is specifically designed for Yamaha 20–30 HP 2-stroke outboard models made between 1984 and 1996. To guarantee fitment, please verify your complete engine model and year against the detailed compatibility table on this page.
What are the signs of a leaking or failed cartridge gasket?
A faulty gasket can cause engine overheating, a weak or non-existent water stream from the "telltale" indicator, or visible water leaks around the water pump housing on the lower unit.
How often should this gasket be replaced?
It's recommended to replace all water pump gaskets, along with the impeller, every 1-2 years or every 100-200 hours of operation as part of routine preventative maintenance.
Is this a complete water pump repair kit?
No, this listing is for the cartridge gasket only. Other components such as the impeller, wear plate, housing, and seals must be purchased separately or as part of a complete kit.
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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