Water Pump Impeller Kit – Fits Yamaha 150-225HP V6 2-Stroke (Replaces 6G5-W0078-A1-00)
Water Pump Impeller Kit – Fits Yamaha 150-225HP V6 2-Stroke (Replaces 6G5-W0078-A1-00) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This Water Pump Impeller Kit – Fits Yamaha 150-225HP V6 2-Stroke (Replaces 6G5-W0078-A1-00) is designed for Yamaha 2-Stroke V6 outboard motors, including 150HP, 175HP, 200HP, and 225HP models manufactured between 1984 and 1991. It provides all the necessary components for a complete and reliable water pump service to maintain optimal engine cooling.
It serves as a direct interchange for Yamaha 6G5-W0078-A1-00, 6G5-W0078-00-00, 6G5-W0078-01-00, Sierra 18-3311, and Mallory 9-48618.
- Engineered for direct replacement installation.
- Features a durable, silver aluminum housing.
- Kit includes all essential hardware for a full service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6G5-W0078-A1-00 |
| Yamaha | 6G5-W0078-00-00 |
| Yamaha | 6G5-W0078-01-00 |
| Sierra | 18-3311 |
| Mallory | 9-48618 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit fits a wide range of Yamaha V6 2-Stroke outboards. It is essential to verify your specific model and year for correct fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 150ETLD | 150 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETLDA | 150 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETLF | 150 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETLJ | 150 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETLK | 150 | 2-Stroke | 1985 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETLN | 150 | 2-Stroke | 1984 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETXD | 150 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETXDA | 150 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETXF | 150 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETXJ | 150 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETXK | 150 | 2-Stroke | 1985 | 6G5-W0078-A1-00 | |
| Yamaha | 150ETXN | 150 | 2-Stroke | 1984 | 6G5-W0078-A1-00 | |
| Yamaha | 150TLRP | 150 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | 150TXRP | 150 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | L150ETXD | 150 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | L150ETXDA | 150 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | L150ETXF | 150 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | L150ETXG | 150 | 2-Stroke | 1988 | 6G5-W0078-A1-00 | |
| Yamaha | L150ETXJ | 150 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | L150TXRP | 150 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | P150TLRP | 150 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | PROV150LD | 150 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | PROV150LDA | 150 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | PROV150LF | 150 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | PROV150LG | 150 | 2-Stroke | 1988 | 6G5-W0078-A1-00 | |
| Yamaha | PROV150LH | 150 | 2-Stroke | 1987 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETLD | 175 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETLDA | 175 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETLF | 175 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETLJ | 175 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETLK | 175 | 2-Stroke | 1985 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETLN | 175 | 2-Stroke | 1984 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETXD | 175 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETXDA | 175 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETXF | 175 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETXJ | 175 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETXK | 175 | 2-Stroke | 1985 | 6G5-W0078-A1-00 | |
| Yamaha | 175ETXN | 175 | 2-Stroke | 1984 | 6G5-W0078-A1-00 | |
| Yamaha | 175TLRP | 175 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | 175TXRP | 175 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETLD | 200 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETLDA | 200 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETLD-JD | 200 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETLF | 200 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETLF-JD | 200 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETLJ | 200 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETLK | 200 | 2-Stroke | 1985 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETLN | 200 | 2-Stroke | 1984 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETXD | 200 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETXDA | 200 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETXF | 200 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETXJ | 200 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETXK | 200 | 2-Stroke | 1985 | 6G5-W0078-A1-00 | |
| Yamaha | 200ETXN | 200 | 2-Stroke | 1984 | 6G5-W0078-A1-00 | |
| Yamaha | 200TJRP | 200 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | 200TLRP | 200 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | 200TXRP | 200 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | L200ETXD | 200 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | L200ETXDA | 200 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | L200ETXF | 200 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | L200ETXG | 200 | 2-Stroke | 1988 | 6G5-W0078-A1-00 | |
| Yamaha | L200ETXJ | 200 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | L200TXRP | 200 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | P200TLRQ | 200 | 2-Stroke | 1992 | 6G5-W0078-A1-00 | |
| Yamaha | 225ETLD | 225 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 225ETLDA | 225 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 225ETXD | 225 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 225ETXDA | 225 | 2-Stroke | 1990 | 6G5-W0078-A1-00 | |
| Yamaha | 225TLRP | 225 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | 225TXRP | 225 | 2-Stroke | 1991 | 6G5-W0078-A1-00 | |
| Yamaha | V6EXCELLF | 225 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | V6EXCELLG | 225 | 2-Stroke | 1988 | 6G5-W0078-A1-00 | |
| Yamaha | V6EXCELLH | 225 | 2-Stroke | 1987 | 6G5-W0078-A1-00 | |
| Yamaha | V6EXCELXF | 225 | 2-Stroke | 1989 | 6G5-W0078-A1-00 | |
| Yamaha | V6EXCELXG | 225 | 2-Stroke | 1988 | 6G5-W0078-A1-00 | |
| Yamaha | V6EXCELXH | 225 | 2-Stroke | 1987 | 6G5-W0078-A1-00 | |
| Yamaha | V6SPECIALLJ | 220 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | V6SPECIALLK | 220 | 2-Stroke | 1985 | 6G5-W0078-A1-00 | |
| Yamaha | V6SPECIALLN | 220 | 2-Stroke | 1984 | 6G5-W0078-A1-00 | |
| Yamaha | V6SPECIALXJ | 220 | 2-Stroke | 1986 | 6G5-W0078-A1-00 | |
| Yamaha | V6SPECIALXK | 220 | 2-Stroke | 1985 | 6G5-W0078-A1-00 | |
| Yamaha | V6SPECIALXN | 220 | 2-Stroke | 1984 | 6G5-W0078-A1-00 |
Technical Specs
- Product Type
- Outboard Water Pump Repair Kit with Housing
- Installation
- Direct Replacement
- Housing Material
- Aluminum
- Housing Color
- Silver
- Engine Compatibility
- For 2-Stroke V6 Outboard Engines
- Product Dimensions
- 17.0" L x 13.0" W x 9.5" H
- Package Dimensions
- 17.0" L x 13.0" W x 9.5" H
What’s in the Box
- 1 x Housing (6E5-44311-00-00)
- 1 x Impeller (6E5-44352-01-00)
- 1 x Gasket, Water Pump (6E5-44315-A0-00)
- 1 x Insert, Cartridge (61A-44322-00-00/6E5-44322-00-00)
- 1 x Outer Plate, Cartridge (6G5-44323-00-00/6G5-44323-01-00)
- 1 x Key, Woodruff (90280-04M05-00)
- 1 x O-Ring (93210-37M67-00)
- 1 x O-Ring (93210-86M38-00)
- 2 x Pin, Dowel (93606-12019-00)
- 4 x Bolt (97080-08045-00/97095-08045-00)
- 4 x Washer (90209-08M02-00)
Installation Notes
- Disconnect the negative battery cable before beginning work.
- Remove the lower unit (gearcase) from the outboard's midsection.
- Unscrew the bolts securing the water pump housing and remove the old assembly.
- Thoroughly clean the driveshaft and all mating surfaces, removing any old gasket material or sealant.
- Install the new Woodruff key and slide the new impeller onto the driveshaft.
- Assemble the new cartridge, gaskets, and plate with the new housing.
- Carefully position the new water pump assembly over the impeller, ensuring the impeller vanes are oriented correctly, and bolt it down to the specified torque.
- Reinstall the lower unit onto the midsection.
- Reconnect the battery, start the engine in a water source, and confirm a strong, steady water stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I confirm this kit fits my specific Yamaha engine?
Check your engine's model and year against the comprehensive 'Engine & Model Compatibility' list above. This kit is designed for Yamaha 2-Stroke V6 models (150-225HP) primarily from 1984 to 1991. Verifying your OEM part number (e.g., 6G5-W0078-A1-00) is the best way to ensure an exact match.
What are the signs of a failing water pump impeller?
Common symptoms include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and reduced engine performance. It's crucial to address these signs immediately to prevent severe engine damage.
How often should I replace the water pump kit?
For optimal reliability and to prevent overheating, we recommend inspecting the impeller annually and replacing the entire water pump kit every 2-3 years or every 200-300 hours of use, whichever comes first. This interval can vary based on operating conditions (e.g., saltwater vs. freshwater).
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
