Water Pump Impeller Kit – Fits Yamaha 60-90 HP Outboards (Replaces 688-44352-03-00, Sierra 18-3070)
Water Pump Impeller Kit – Fits Yamaha 60-90 HP Outboards (Replaces 688-44352-03-00, Sierra 18-3070) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller Kit – Fits Yamaha 60-90 HP Outboards (Replaces ...
Water Pump Impeller Kit – Fits Yamaha 60-90 HP Outboards (Replaces 688-44352-03-00, Sierra 18-3070) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Kit – Fits Yamaha 60-90 HP Outboards (Replaces 688-44352-03-00) provides a reliable solution for maintaining your engine's cooling system. It is designed for a wide range of Yamaha 2-Stroke outboards, including 60–90 HP models from 1984–2019 and specific 115/200 HP engines from 1992–1994.
This kit serves as a direct interchange for Yamaha part number 688-44352-03-00, as well as aftermarket equivalents Sierra 18-3070, GLM 89910, and Mallory 9-45602.
- Engineered for direct OEM-replacement installation.
- Self-priming design lubricated by the pumped fluid.
- Made from durable, temperature-resistant neoprene rubber.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 688-44352-03-00 |
| Sierra | 18-3070 |
| GLM | 89910 |
| Mallory | 9-45602 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
For Yamaha Outboards: This impeller fits various 2-stroke models. Check your specific engine against the compatible years and HP ratings listed.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | Outboard | 60 | 2-Stroke | 2004–2019 | 688-44352-03-00 | 3 cylinder engines |
| Yamaha | Outboard | 70 | 2-Stroke | 2004–2019 | 688-44352-03-00 | 3 cylinder engines |
| Yamaha | Outboard | 75 | 2-Stroke | 1994–2000 | 688-44352-03-00 | 3 cylinder engines |
| Yamaha | Outboard | 80 | 2-Stroke | 1997 | 688-44352-03-00 | 3 cylinder engines |
| Yamaha | Outboard | 85 | 2-Stroke | 1989–1996 | 688-44352-03-00 | 3 cylinder engines |
| Yamaha | Outboard | 90 | 2-Stroke | 1984–2019 | 688-44352-03-00 | 3 cylinder engines |
| Yamaha | Outboard | 115/200 | 2-Stroke | 1992–1994 | 688-44352-03-00 |
Technical Specs
- Product Type
- Water Pump Impeller Kit
- Installation
- Direct OEM replacement
- Housing Material
- Neoprene (rubber)
- Housing Color
- Black
- Dimensions
- 58 mm diameter, 29 mm height, 20 mm shaft diameter
- Number of Blades
- 6
- Shaft Size
- 20 mm diameter
- Other Technical Attributes
- Self-priming, pumped fluid provides lubrication
What’s in the Box
- 1 x Impeller (Replaces OEM 688-44352-03-00)
Installation Notes
- Disconnect the battery and spark plug wires for safety.
- Place the outboard in neutral and remove the lower unit (gearcase).
- Locate and unbolt the water pump housing to access the old impeller.
- Clean the housing interior and inspect it for wear or damage.
- Install the new impeller, ensuring the blades are oriented in the correct rotational direction (typically clockwise).
- Reassemble the water pump housing, applying sealant to gaskets if required.
- Reinstall the lower unit, ensuring the driveshaft and water tube align correctly.
- Reconnect the battery and test the engine with a reliable water source to verify proper water flow.
Troubleshooting & FAQ
How do I know if my impeller needs replacing?
Common signs of a failing impeller include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alerts, or visible cracks, stiffness, or missing blades on the old impeller upon inspection.
What is the recommended replacement interval for an impeller?
For optimal performance and to prevent overheating, it is recommended to inspect your impeller annually and replace it every 1-2 years, or after every 100-200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).
Will this impeller fit my specific Yamaha engine?
This impeller is designed for a broad range of Yamaha models listed in the Engine Compatibility table. Always verify your engine's model, HP, and year fall within the specified range. When in doubt, compare the part number and dimensions to your original part.
What tools are typically needed for installation?
You will generally need a basic socket/wrench set, screwdrivers, a gasket scraper, and potentially a marine-grade sealant. Refer to your engine's service manual for specific tool requirements.
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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