Water Pump Repair Kit – Fits Yamaha 4HP, 5HP, 6HP 4-Stroke Outboards (Replaces 6E0-W0078-00, 6EE-W0078-01)
Water Pump Repair Kit – Fits Yamaha 4HP, 5HP, 6HP 4-Stroke Outboards (Replaces 6E0-W0078-00, 6EE-W0078-01) is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit – Fits Yamaha 4HP, 5HP, 6HP 4-Stroke Outboard...
Water Pump Repair Kit – Fits Yamaha 4HP, 5HP, 6HP 4-Stroke Outboards (Replaces 6E0-W0078-00, 6EE-W0078-01) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit is intended for selected Yamaha 4HP, 5HP, and 6HP four-stroke outboard motors, including applicable F4A/F4B, F5A, and F6C series engines. It is designed to help renew worn water-pump components and restore dependable cooling-water circulation. Because water-pump parts can vary by model year and serial-number range, confirm the exact engine model and original part number before ordering.
This aftermarket replacement kit is listed as an interchange for Yamaha part numbers 6E0-W0078-00, 6E0-W0078-01, 6E0-W0078-02, 6E0-W0078-A2, 6E0-W0078-A200, 6EE-W0078-00, and 6EE-W0078-01. These references identify the applicable replacement series; they do not indicate that this product is a genuine Yamaha component.
- Designed as a replacement water-pump repair kit for selected Yamaha four-stroke outboards.
- Helps renew the impeller, pump housing, plates, gaskets, and related water-pump hardware.
- Suitable for standard marine service when correctly matched to the engine model and serial-number range.
- Verify the original pump configuration before installation, especially on engines near the 6E0-to-6EE transition.
Part Number Matrix
Use the following references to compare the required replacement series with the number on your original water-pump assembly.
| Brand | Part Number |
|---|---|
| Yamaha | 6E0-W0078-00 |
| Yamaha | 6E0-W0078-01 |
| Yamaha | 6E0-W0078-02 |
| Yamaha | 6E0-W0078-A2 |
| Yamaha | 6E0-W0078-A200 |
| Yamaha | 6EE-W0078-00 |
| Yamaha | 6EE-W0078-01 |
Engine & Model Compatibility
The table below reflects the listed application ranges. Model-year and serial-number boundaries can vary by market and configuration, so use the engine identification label, service information, and the original water-pump parts before purchase.
| Brand | Model | Rated HP | Stroke | Listed Years | Reference Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F4A | 4 | 4-Stroke | 1999–2008 | 6E0-W0078-00/01/02 | Early-model application range |
| Yamaha | F4B | 4 | 4-Stroke | 2009–Present | 6EE-W0078-01 | Later-model application range; verify serial number |
| Yamaha | F4LMHA | 4 | 4-Stroke | 2019–2020 | 6EE-W0078-01 | Verify the original pump configuration |
| Yamaha | F4SMHA | 4 | 4-Stroke | 2019–2020 | 6EE-W0078-01 | Verify the original pump configuration |
| Yamaha | F5A | 5 | 4-Stroke | 1999–Present | 6E0-W0078-00/01/02; 6EE-W0078-01 | Confirm the exact model and serial range |
| Yamaha | F6C | 6 | 4-Stroke | 1999–Present | 6E0-W0078-00/01/02; 6EE-W0078-01 | Confirm the exact model and serial range |
| Yamaha | F6LMHA | 6 | 4-Stroke | 2019–2020 | 6EE-W0078-01 | Verify the original pump configuration |
| Yamaha | F6SMHA | 6 | 4-Stroke | 2019–2020 | 6EE-W0078-01 | Verify the original pump configuration |
Technical Specifications
- Product Type
- Water pump repair kit
- Application
- Selected Yamaha 4HP, 5HP, and 6HP four-stroke outboard motors
- Installation
- Replacement installation using the original assembly as a reference
- Construction
- Composite and metal components, depending on the individual kit component
- Service Environment
- Standard marine operating conditions
- Brand Status
- Aftermarket replacement; not a genuine Yamaha component
What’s in the Box
Components listed for the 6E0-W0078 series configuration:
- 1 x Water-pump housing (6E0-44311-00)
- 1 x Water-pump gasket (6E0-44315-A0)
- 1 x Inner water-pump component (6E0-44322-02)
- 1 x Plate (6E0-44323-00)
- 1 x Damper (6E0-44366-00)
- 1 x Impeller (6E0-44352-00)
- 2 x Dowel pins (93604-18080 and 93604-09066)
- 1 x Plate (6E0-44328-00)
- 4 x Bolts; bolt specification may vary by kit configuration
Components listed for the 6EE-W0078 series configuration:
- 1 x Water-pump housing (6EE-G4311-00-00)
- 1 x Water-pump gasket (6EE-G4315-00-00)
- 1 x Cartridge insert (6BX-44322-00-00)
- 1 x Outer cartridge plate (6BX-44323-00-00)
- 1 x Water-seal damper 2 (67D-44366-00-00)
- 1 x Impeller (6E0-44352-00-00)
- 2 x Dowel pins (93604-18080-00)
- 4 x Bolts (97080-06045-00-00)
Check the original assembly and the applicable reference number before installation. Do not mix 6E0 and 6EE component configurations unless the engine manufacturer’s service information specifies that combination.
Installation Notes
- Review the engine service information and confirm the correct kit series before disassembly.
- Stop the engine, remove the ignition key, disconnect the battery where applicable, and secure the outboard safely.
- Remove the lower unit according to the manufacturer’s procedure. Support the lower unit to prevent damage to the driveshaft, shift linkage, and water tube.
- Locate the water-pump housing on top of the gearcase and remove the retaining bolts.
- Record the order and orientation of the existing impeller, plates, gasket, damper, pins, and housing before removal.
- Remove the old water-pump components and clean the housing and mating surfaces. Remove old gasket material without damaging the sealing surfaces.
- Compare every replacement component with the removed part and install the new components in the correct order.
- Orient the impeller vanes according to the manufacturer’s service procedure and apply only the lubricant recommended for the application.
- Reinstall the water-pump housing and tighten the fasteners to the manufacturer’s specified torque.
- Reattach the lower unit, ensuring that the driveshaft, shift linkage, and water tube are correctly aligned.
- If gearcase oil was drained during service, refill it with the specified lubricant and check for leaks.
- Run the engine only in water or with an appropriate flushing device. Confirm a steady tell-tale stream and check for overheating before returning the boat to service.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha outboard?
Compare the engine brand, exact model, horsepower, stroke, model year, and serial-number range with the compatibility information and the original water-pump part number. For engines near the 2009 transition, confirm whether the original assembly uses the 6E0 or 6EE configuration.
What are the signs of a failing water pump?
Common signs include a weak or missing tell-tale stream, an overheating warning, elevated operating temperature, or visible damage to the impeller and water-pump housing. Stop operating the engine if overheating occurs and inspect the cooling system.
How often should I replace the water-pump impeller?
Inspect the impeller at the interval specified by the engine manufacturer. Replacement timing depends on service hours, storage conditions, and exposure to saltwater, sand, silt, or debris. Replace it sooner if the vanes are cracked, deformed, brittle, or worn.
What is the difference between the 6E0 and 6EE kits?
The 6E0 and 6EE reference series use different water-pump component configurations. The 6EE configuration includes cartridge-style components in the listed parts, while the 6E0 configuration uses the corresponding earlier-style components. Match the kit to the engine’s original assembly and applicable service information.
Is this an OEM Yamaha kit?
No. This listing is for an aftermarket replacement kit. The Yamaha part numbers shown are reference and interchange numbers for identifying the intended application; Yamaha is not the manufacturer of this aftermarket product.
How should I confirm the package contents?
Review the applicable 6E0 or 6EE component list before ordering. Component details can differ between the two configurations, so do not rely on horsepower alone when selecting the kit.
Safety & Important Information
- Verify the engine model, year, serial-number range, original water-pump configuration, and reference part number before purchase.
- Do not operate an outboard without an adequate water supply. Use water as specified by the manufacturer or an appropriate flushing device.
- Do not continue operating the engine if the tell-tale stream is weak or absent, or if an overheating warning appears.
- Follow the manufacturer’s torque specifications, service procedures, and lubrication requirements.
- Professional installation is recommended when lower-unit removal or shift-linkage adjustment is required.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for dependable service in real-world operating conditions.
- Global Fulfillment — Shipping options and estimated delivery times are shown at checkout for the destination.
- Manufacturer-Direct Value — We aim to provide practical replacement solutions with clear application and component information.
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