Water Pump Kit – Fits Yamaha 2-Stroke 115-130HP (Replaces Yamaha 6E5-W0078-3A-00, Sierra 18-3372, 18-3373)
Water Pump Kit – Fits Yamaha 2-Stroke 115-130HP (Replaces Yamaha 6E5-W0078-3A-00, Sierra 18-3372, 18-3373) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Water Pump Kit – Fits Yamaha 2-Stroke 115-130HP (Replaces Yamaha 6E...
Water Pump Kit – Fits Yamaha 2-Stroke 115-130HP (Replaces Yamaha 6E5-W0078-3A-00, Sierra 18-3372, 18-3373) is backordered and will ship as soon as it is back in stock.
Product Details
This Chrome Water Pump Kit – Fits Yamaha 2-Stroke Outboards (Replaces 6E5-W0078-3A-00) is designed to service Yamaha 115HP and 130HP two-stroke outboards manufactured between 1993 and 1996. It provides all the necessary components for a complete water pump rebuild, ensuring your engine maintains proper cooling and performance.
This kit is a direct replacement for Yamaha OEM part numbers 6E5-W0078-3A-00 and 6E5-W0078-3A, as well as Sierra aftermarket equivalents 18-3372 and 18-3373.
- Engineered for direct replacement installation.
- Features a durable, corrosion-resistant chrome housing.
- Built to meet or exceed original manufacturer specifications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6E5-W0078-3A-00 |
| Yamaha | 6E5-W0078-3A |
| Sierra | 18-3372 |
| Sierra | 18-3373 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Compatible with the following Yamaha 2-stroke outboard models:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | C115 | 115 | 2-Stroke | 1992–1996 | 6E5-W0078-3A-00 |
| Yamaha | 115 | 115 | 2-Stroke | 1993–1996 | 6E5-W0078-3A-00 |
| Yamaha | C130 | 130 | 2-Stroke | 1996 | 6E5-W0078-3A-00 |
| Yamaha | L130 | 130 | 2-Stroke | 1993–1996 | 6E5-W0078-3A-00 |
| Yamaha | S115 | 115 | 2-Stroke | 1996 | 6E5-W0078-3A-00 |
| Yamaha | S130 | 130 | 2-Stroke | 1996 | 6E5-W0078-3A-00 |
| Yamaha | P115 | 115 | 2-Stroke | 1993–1996 | 6E5-W0078-3A-00 |
Technical Specs
- Product Type
- Water Pump Service Kit
- Installation
- Direct Replacement
- Housing Material
- Chrome
- Other Technical Attributes
- Meets OEM Specifications
What’s in the Box
- Water Pump Housing
- Impeller
- Gaskets
- O-Rings
- Woodruff Key
- Washers
- Dowel Pins
- Bolts
Installation Notes
- Disconnect the battery and safely secure the engine.
- Remove the lower unit (gearcase) from the outboard motor.
- Unbolt and remove the old water pump housing and impeller assembly.
- Thoroughly clean all mating surfaces to remove any old gasket material or sealant.
- Install the new woodruff key and slide the new impeller onto the driveshaft.
- Assemble the new gaskets, plates, and housing as per the included components.
- Torque the housing bolts to the manufacturer's specified values.
- Reinstall the lower unit, ensuring the driveshaft and water tube align correctly.
- Start the engine in a safe environment and verify a strong, consistent water stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this water pump kit fits my outboard?
This kit is specifically designed for Yamaha 115HP and 130HP 2-stroke models from the 1993–1996 era. To ensure fitment, please check your engine's model number and year against the compatibility chart provided on this page.
What are the common signs of a failing water pump?
Key indicators of a worn or failing water pump include the engine overheating at low RPMs, a weak or intermittent water stream from the "tell-tale" cooling outlet, or, in severe cases, a steam-filled exhaust. Regular inspection is key.
How often should I replace my water pump impeller?
As a crucial part of preventative maintenance, it is recommended to inspect your water pump impeller annually and replace it every 1-2 years or every 100-200 hours of operation, whichever comes first. This interval may be shorter in engines operated frequently in saltwater or silty/sandy conditions.
Is the chrome housing just for aesthetics?
While the polished chrome offers a distinct custom look, it also provides an extra layer of durability and corrosion resistance compared to standard painted housings, which is particularly beneficial in harsh saltwater environments.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. The part is manufactured in an ISO 9002 facility and is batch-inspected for quality and consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free for most orders; expedited options will appear at checkout if they are available for your location.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their 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
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