Water Pump Repair Kit with Housing for Yamaha 150–300 HP Outboards – Replaces 61A-W0078-A2-00 and 61A-W0078-A3-00
Water Pump Repair Kit with Housing for Yamaha 150–300 HP Outboards – Replaces 61A-W0078-A2-00 and 61A-W0078-A3-00 is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit with Housing for Yamaha 150–300 HP Outboards ...
Water Pump Repair Kit with Housing for Yamaha 150–300 HP Outboards – Replaces 61A-W0078-A2-00 and 61A-W0078-A3-00 is backordered and will ship as soon as it is back in stock.
Product Details
This complete water pump repair kit with housing is designed to service the cooling system on selected Yamaha 150–300 HP outboard motors. The kit is listed for both Yamaha 2-stroke and 4-stroke applications and is intended for installation in the lower unit/gearcase.
The kit replaces Yamaha OEM references 61A-W0078-A2-00 and 61A-W0078-A3-00. Catalog references also identify the complete kit as a housing-included water pump kit and cross-reference Sierra 18-3396-1 for the related Yamaha application.
- Complete water pump service kit with housing.
- Includes the impeller, key, insert/cup, wear plate, gaskets, O-rings, dowel pins, and fastening hardware.
- Installs in the outboard lower unit/gearcase.
- For selected Yamaha 2-stroke and 4-stroke engines; confirm the exact model, year, shaft configuration, and serial range before ordering.
Part Number Cross-Reference
These references identify the application family covered by the kit. Cross-reference numbers should be checked against the engine model and the original water pump assembly.
| Brand | Part Number | Reference Type | Notes |
|---|---|---|---|
| Yamaha | 61A-W0078-A2-00 | OEM reference | Replaced by the complete housing-included kit application. |
| Yamaha | 61A-W0078-A3-00 | OEM reference | Exact water pump repair kit number identified in Yamaha engine catalogs. |
| Yamaha | 61A-44322-00-00 | Component reference | Water pump insert/cup component listed with the related kit. |
| Yamaha | 6E5-44352-01-00 | Component reference | Impeller component listed with the related kit. |
| Sierra | 18-3396-1 | Aftermarket cross-reference | Related Yamaha water pump kit reference; verify housing configuration and contents. |
Engine Compatibility
Cataloged applications include selected Yamaha 2-stroke and 4-stroke outboards from 150 to 300 HP. The examples below are documented occurrences for Yamaha water pump repair kit reference 61A-W0078-A3-00. Model and year conditions must remain together when confirming fitment.
| Brand | Model | Rated HP | Stroke | Year | Application |
|---|---|---|---|---|---|
| Yamaha | LZ150TXRY, VZ150TLRY, Z150TLRY, Z150TXRY | 150 | 2-Stroke | 2000 | Water pump repair kit reference 61A-W0078-A3-00. |
| Yamaha | LZ200TXRY, Z200TLRY, Z200TXRY | 200 | 2-Stroke | 2000 | Water pump repair kit reference 61A-W0078-A3-00. |
| Yamaha | 150TXRZ, LX150TXRZ, LZ150TXRZ, SX150TXRZ, VX150TLRZ, VZ150TLRZ, Z150TLRZ, Z150TXRZ | 150 | 2-Stroke | 2001 | Water pump repair kit reference 61A-W0078-A3-00. |
| Yamaha | VZ175TLRZ, Z175TXRZ | 175 | 2-Stroke | 2001 | Water pump repair kit reference 61A-W0078-A3-00. |
| Yamaha | LX200TXRZ, LZ200TXRZ, SX200TXRZ, VZ200TLRZ, Z200TLRZ, Z200TXRZ | 200 | 2-Stroke | 2001 | Water pump repair kit reference 61A-W0078-A3-00. |
| Yamaha | 150TXRA | 150 | 2-Stroke | 2002 | Water pump repair kit reference 61A-W0078-A3-00. |
| Yamaha | F200TXRA, LF200TXRA | 200 | 4-Stroke | 2002 | Water pump repair kit reference 61A-W0078-A3-00. |
| Yamaha | F225TURA, F225TXRA, LF225TURA, LF225TXRA | 225 | 4-Stroke | 2002 | Water pump repair kit reference 61A-W0078-A3-00. |
Important: This is not a universal fit for every Yamaha 150–300 HP outboard. Yamaha model codes, production year, shaft configuration, lower-unit design, and serial range can change the correct water pump assembly. Compare the original part and confirm the exact engine application before purchase.
Technical Specifications
- Product Type
- Complete water pump repair kit with housing
- Application
- Yamaha outboard lower unit/gearcase cooling system
- Horsepower Range
- Selected 150–300 HP applications
- Stroke Applications
- Selected 2-stroke and 4-stroke Yamaha outboards
- Housing
- Included
- Housing Material
- Plastic housing; verify appearance and material against the original part before installation
- Replacement References
- Yamaha 61A-W0078-A2-00 and 61A-W0078-A3-00
What's in the Box
- 1 x Water pump housing
- 1 x Impeller, Yamaha reference 6E5-44352-01-00
- 1 x Impeller key, Yamaha reference 90280-04M05-00
- 1 x Insert/cup, Yamaha reference 61A-44322-00-00
- 1 x Wear plate, Yamaha reference 6G5-44323-01-00
- 1 x Water pump gasket, Yamaha reference 6E5-44315-A0-00
- 1 x O-ring, Yamaha reference 93210-37M67-00
- 1 x O-ring, Yamaha reference 93210-86M38-00
- 2 x Dowel pins, Yamaha reference 93606-12019-00
- 4 x Bolts with washers
Installation Notes
- Disconnect the battery and place the outboard in neutral.
- Support the lower unit securely before removing the gearcase fasteners.
- Remove the lower unit while keeping the driveshaft, shift shaft, and water tube aligned for reassembly.
- Remove the old water pump components and clean the mating surfaces thoroughly.
- Install the gasket, insert/cup, wear plate, impeller key, impeller, O-rings, housing, dowel pins, and fasteners in the correct order for the engine model.
- Make sure the impeller key is fully seated before installing the impeller.
- Torque the housing and lower-unit fasteners to the Yamaha service-manual specifications for the specific engine.
- Reinstall the lower unit and verify correct engagement of the driveshaft, shift shaft, and water tube.
- Run the engine using the appropriate water supply and confirm a strong, continuous tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I confirm fitment?
Compare the engine's complete model code, year, shaft configuration, and serial range with the application information for this kit. Also compare the original water pump housing, insert, wear plate, impeller, and fastener arrangement. A horsepower match alone does not confirm fitment.
What are common signs of a worn water pump?
Common signs include overheating, a weak or intermittent tell-tale stream, reduced cooling-water flow, or an impeller that is cracked, brittle, deformed, or missing vanes.
Does this kit include the housing?
Yes. This listing is for the housing-included version of the water pump repair kit. It also includes the impeller, key, insert/cup, wear plate, gaskets, O-rings, dowel pins, and fastening hardware listed above.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement kit intended for the listed Yamaha applications. Yamaha part numbers are shown only as identification and cross-reference references.
Can an experienced owner install it?
Installation requires removal and reinstallation of the lower unit. It may be suitable for an experienced marine mechanic with the correct tools and service information, but professional installation is recommended when the lower unit is heavy or the model-specific torque and alignment procedures are unfamiliar.
How often should the water pump be serviced?
Follow the maintenance interval in the Yamaha service manual for the specific engine. Inspect the impeller and related seals more frequently when operating in saltwater, sand, silt, or other abrasive conditions.
Safety & Important Information
- Verify the exact engine model, year, serial range, and original component configuration before ordering.
- Do not operate the engine without an adequate water supply during testing.
- Use the correct model-specific torque values and follow the applicable Yamaha service procedures.
- This is an aftermarket replacement, not an OEM Yamaha component.
About Sea Sierra
- Marine Replacement Parts — Parts selected for common service and repair applications.
- Application-Focused Listings — Product references and compatibility information are provided to help match the correct component.
- Support for Installation Planning — Always compare the original assembly and consult the engine service information before installation.
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