Water Pump Repair Kit – Fits Yamaha 115/130 HP 2-Stroke (Replaces 6E5-W0078-A1-00)
Water Pump Repair Kit – Fits Yamaha 115/130 HP 2-Stroke (Replaces 6E5-W0078-A1-00) 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 Repair Kit – Fits Yamaha 115/130 HP 2-Stroke (Replaces 6...
Water Pump Repair Kit – Fits Yamaha 115/130 HP 2-Stroke (Replaces 6E5-W0078-A1-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit is engineered for Yamaha 2-Stroke outboard motors, specifically for 115 HP to 130 HP models manufactured from 1984–1992. It provides a complete solution for servicing the water pump on standard 115/130 and C115 commercial models within this range.
The kit serves as a direct interchange for Yamaha OEM part 6E5-W0078-A1-00 and Sierra Marine part 18-3434, ensuring proper fit and function.
- Designed for direct-fit installation with no modifications required.
- Includes all essential gaskets, impeller, plates, and hardware for a full replacement.
- Built for reliable performance and durability in marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6E5-W0078-A1-00 |
| Sierra | 18-3434 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 115 | 115 | 2-Stroke | 1984–1992 | 6E5-W0078-A1-00 |
| Yamaha | C115 | 115 | 2-Stroke | 1991–1992 | 6E5-W0078-A1-00 |
| Yamaha | 130 | 130 | 2-Stroke | 1988–1992 | 6E5-W0078-A1-00 |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- Direct OEM Replacement
- Housing Material
- Not Included (Housing Sold Separately)
- Operating Temperature
- Marine Environment
- Kit Contents
- Includes all necessary components for complete water pump impeller replacement
What’s in the Box
- 1 x Water Pump Gasket (6E5-44315-A0-00)
- 1 x Cartridge Insert (6E5-44322-00-00)
- 1 x Cartridge Outer Plate (6E5-44323-00-00)
- 1 x Impeller (6E5-44352-01-00)
- 4 x Washers (90209-08M02-00)
- 1 x Woodruff Key (90280-04M05-00)
- 1 x O-Ring (93210-37M67-00)
- 1 x O-Ring (93210-86M38-00)
- 2 x Dowel Pins (93606-12019-00)
- 4 x Bolts (97080-08045-00)
Installation Notes
- Disconnect the battery and shift the outboard into neutral. Remove the lower unit (gearcase) from the engine.
- Unbolt and carefully remove the existing water pump assembly. Note the orientation of all components.
- Thoroughly clean all mating surfaces, removing any old gasket material or sealant residue.
- Inspect the water pump housing for signs of cracking, scoring, or heat damage. Replace the housing if any damage is found.
- Install the new gasket, plates, impeller, and key from the kit. Lightly lubricate the impeller with marine grease.
- Reassemble the pump housing and torque the bolts to the manufacturer's specifications.
- Reinstall the lower unit, ensuring the driveshaft, shift shaft, and water tube are correctly aligned.
- Once assembled, start the engine in water and verify a strong, consistent stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha outboard?
This kit is specifically designed for Yamaha 115–130 HP 2-Stroke models from 1984 to 1992. Always verify your engine's model, horsepower, and year against the compatibility chart provided on this page.
Does this kit include the water pump housing?
No, the housing (OEM part 6E5-44311-00-00) is not included. This kit contains the internal service components (impeller, gaskets, plates, etc.). You must inspect your existing housing and purchase a new one separately if it's cracked, warped, or corroded.
What are the signs of a failing water pump?
Common symptoms include a weak or intermittent water stream from the "tell-tale" indicator, engine overheating alarms, a reduction in engine performance, and in severe cases, steam from the exhaust.
How often should the water pump be serviced?
As a general maintenance guideline, we recommend inspecting the impeller annually and replacing it every 2-3 years or 200-300 hours of operation, whichever comes first. Use in saltwater or silty/sandy conditions may require more frequent service.
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?
p>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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