Water Pump Repair Kit for Yamaha Outboard 150–200 HP 2-Stroke and F150/F175 4-Stroke Engines – Replaces 61A-W0078-A3-00 and 61A-W0078-A4-00
Water Pump Repair Kit for Yamaha Outboard 150–200 HP 2-Stroke and F150/F175 4-Stroke Engines – Replaces 61A-W0078-A3-00 and 61A-W0078-A4-00 is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit for Yamaha Outboard 150–200 HP 2-Stroke and F...
Water Pump Repair Kit for Yamaha Outboard 150–200 HP 2-Stroke and F150/F175 4-Stroke Engines – Replaces 61A-W0078-A3-00 and 61A-W0078-A4-00 is backordered and will ship as soon as it is back in stock.
Product Details
This water pump repair kit is designed to service the cooling-system water pump on selected Yamaha outboard engines. Catalog records identify the referenced water pump repair kit for Yamaha 150–200 HP 2-stroke models and selected F150/F175 4-stroke models. Confirm the complete engine model and year before ordering.
The kit is associated with Yamaha OEM reference numbers 61A-W0078-A3-00 and 61A-W0078-A4-00. These references cover different engine applications, so the number on your existing water-pump kit or the exact engine model should be checked carefully.
- Replacement water-pump service components for selected Yamaha outboards.
- Helps restore water-pump performance when the impeller or related pump components are worn.
- Aftermarket replacement; not manufactured or sold by Yamaha.
Part Number References
Use these references together with the engine compatibility information below. A part-number match should still be confirmed against the exact engine model and year.
| Brand | OEM Reference | Application Group | Reference Notes |
|---|---|---|---|
| Yamaha | 61A-W0078-A3-00 | Selected 150–200 HP 2-stroke outboards | Catalog-listed water pump repair kit reference |
| Yamaha | 61A-W0078-A4-00 | Selected F150/F175 4-stroke outboards | Catalog-listed water pump repair kit reference |
Engine and Model Compatibility
The applications below are catalog-supported examples. Fitment can vary by model suffix, year, shaft configuration, and serial-number range. Do not rely on horsepower alone.
| Brand | Engine Model | Rated HP | Stroke | Year | OEM Reference | Catalog Condition |
|---|---|---|---|---|---|---|
| Yamaha | LZ150TXRY, VZ150TLRY, Z150TLRY, Z150TXRY | 150 | 2-Stroke | 2000 | 61A-W0078-A3-00 | Listed in the water pump repair kit diagram |
| Yamaha | LZ200TXRY, Z200TLRY, Z200TXRY | 200 | 2-Stroke | 2000 | 61A-W0078-A3-00 | Listed in the water pump repair kit diagram |
| Yamaha | 150TXRZ, LX150TXRZ, LZ150TXRZ, SX150TXRZ, VX150TLRZ, VZ150TLRZ, Z150TLRZ, Z150TXRZ | 150 | 2-Stroke | 2001 | 61A-W0078-A3-00 | Listed in the water pump repair kit diagram |
| Yamaha | LX200TXRZ, LZ200TXRZ, SX200TXRZ, VZ200TLRZ | 200 | 2-Stroke | 2001 | 61A-W0078-A3-00 | Listed in the water pump repair kit diagram |
| Yamaha | F150JB, F150LB, F150LB2, F150LCA, F150LCA2, F150XB, F150XB2, F150XCA, F150XCA2 | 150 | 4-Stroke | 2021 | 61A-W0078-A4-00 | Listed in the repair-kit and/or scheduled-service-parts diagram |
| Yamaha | F175LA | 175 | 4-Stroke | 2021 | 61A-W0078-A4-00 | Listed in the repair-kit and scheduled-service-parts diagrams |
Technical Specifications
- Product Type
- Outboard water pump repair kit
- Application
- Marine outboard cooling-system water pump
- Replacement Type
- Aftermarket replacement for selected Yamaha applications
- Compatible Stroke Types
- Selected 2-stroke and 4-stroke Yamaha outboards as listed above
- Housing and Pump Components
- Includes water-pump service components; verify the package contents against the product images and the original parts before installation
What's in the Box
- 1 x Cartridge insert — 61A-44322-02-00
- 1 x O-ring — 93210-86M38-00
- 1 x O-ring — 93210-37M67-00
- 1 x Impeller — 6E5-44352-01-00
- 1 x Cartridge outer plate — 6G5-44323-01-00
- 1 x Water-pump gasket — 6E5-44315-A0-00
- 2 x Dowel pin — 93606-12019-00
- 4 x Bolt with washer — 90119-08M14-00
- 1 x Woodruff key — 90280-04M05-00
Package contents should be compared with the removed parts and the product images before installation. Component appearance and supplied hardware may vary by application.
Installation Notes
- Disconnect the battery and secure the outboard in a stable working position.
- Place a drain pan beneath the lower unit and follow the engine manufacturer's procedure for draining gearcase lubricant if required for lower-unit removal.
- Remove the lower unit according to the service manual for the exact engine model.
- Remove the old water-pump housing and note the orientation of the impeller, key, plates, gaskets, and seals.
- Clean the pump mounting surfaces and inspect the driveshaft, water tube, keyway, housing, and wear surfaces for damage.
- Install the replacement components in the correct order. Turn the impeller vanes in the direction specified by the engine service manual.
- Use a marine-safe lubricant or assembly lubricant where specified by the service manual. Do not use products that can damage rubber components.
- Seat all gaskets and O-rings correctly and tighten fasteners to the manufacturer's torque specifications.
- Reinstall the lower unit, ensuring correct alignment of the driveshaft, shift shaft, and water tube.
- Refill the gearcase with the specified lubricant if it was drained, then test the engine while monitoring the cooling-water tell-tale and temperature.
Troubleshooting and FAQ
How do I confirm fitment?
Check the complete Yamaha model designation, year, stroke type, shaft configuration, and serial-number range against the compatibility information. If possible, compare the existing water-pump kit and component numbers with the references listed on this page.
What are common signs of a worn water pump?
Possible signs include a weak or interrupted tell-tale stream, overheating warnings, abnormal operating temperature, steam, or reduced cooling performance. Stop operation if the engine overheats and diagnose the cooling system before continued use.
Should the impeller be replaced as part of routine maintenance?
Water-pump inspection and impeller replacement intervals depend on the engine model, operating conditions, and manufacturer's service schedule. Follow the service manual for the exact engine rather than relying on a universal hour or calendar interval.
Is this an OEM Yamaha kit?
No. This is an aftermarket replacement kit intended for selected Yamaha outboard applications. Yamaha reference numbers are shown only for identification and fitment comparison.
Is professional installation recommended?
Yes. Lower-unit removal and water-pump service require correct alignment, sealing, and torque procedures. Use the applicable service manual or have the work performed by a qualified marine technician.
What are the shipping and warranty terms?
Shipping, returns, and warranty coverage are governed by the terms shown at checkout and the applicable store policies.
Safety and Important Information
- Confirm the exact engine model, year, stroke type, and serial-number range before ordering.
- Do not operate an outboard without verifying proper cooling-water flow after installation.
- Replace damaged housings, plates, driveshaft components, or other parts that could prevent correct pump operation.
- This is an aftermarket replacement and is not an OEM Yamaha component.
- Always follow the engine manufacturer's service instructions and torque specifications.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for common outboard service requirements.
- Fitment-Focused Listings — Product references and application information are provided to support careful part selection.
- Service Support — Compare the original component and exact engine details before installation.
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