Water Pump Repair Kit with Housing for Select Yamaha 150–300 HP Outboards – Replaces 61A-W0078-A2-00 and 61A-W0078-A3-00
Water Pump Repair Kit with Housing for Select 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 Select Yamaha 150–300 HP Out...
Water Pump Repair Kit with Housing for Select 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 aftermarket water pump repair kit with housing is designed for select Yamaha 150–300 HP outboards. It replaces Yamaha water pump repair kit references 61A-W0078-A2-00 and 61A-W0078-A3-00 in applicable applications and is intended to restore water-pump sealing, impeller drive, and cooling-water flow during a lower-unit service.
The kit is supplied as a complete water-pump service assembly rather than as an impeller alone. The included housing, impeller, insert cup, wear plate, gasket, key, O-rings, dowel pins, and bolt-and-washer hardware are matched for the listed water-pump application.
- Complete water-pump repair kit with housing.
- Includes the impeller, housing, insert cup, wear plate, gasket, key, seals, pins, and mounting hardware listed below.
- Aftermarket replacement; not manufactured by Yamaha.
- Verify the exact Yamaha model, year, shaft configuration, and existing part number before ordering.
OEM and Aftermarket References
Use these references to compare the replacement kit with your original water-pump parts. A matching number alone does not confirm fitment for every model or year.
| Brand | Reference | Reference Type | Notes |
|---|---|---|---|
| Yamaha | 61A-W0078-A2-00 | OEM water pump repair kit reference | Listed replacement reference for applicable Yamaha applications. |
| Yamaha | 61A-W0078-A3-00 | OEM water pump repair kit reference | Listed replacement reference for applicable Yamaha applications. |
| Yamaha | 61A-W0078-A4-00 | OEM water pump repair kit reference | Appears in later Yamaha catalog applications; confirm the exact model and year before using this reference for your engine. |
| Sierra | 18-3396-1 | Aftermarket interchange reference | Cataloged as a Yamaha water pump kit reference associated with the A2/A3 application. |
Engine and Model Compatibility
The catalog evidence supports the following example applications for the referenced Yamaha water-pump repair kits. These examples are not a substitute for checking the complete model designation and serial-number range.
| Brand | Example Model | HP | Stroke | Year | Applicable OEM Reference |
|---|---|---|---|---|---|
| Yamaha | 150TJRV, 150TLRV, 150TXRV, C150TLRV, C150TXRV, L150TXRV, S150TLRV, S150TXRV | 150 | 2-Stroke | 1997 | 61A-W0078-A2-00 |
| Yamaha | 200TLRV, L200TXRV, S200TXRV | 200 | 2-Stroke | 1997 | 61A-W0078-A2-00 |
| Yamaha | 225TLRV | 225 | 2-Stroke | 1997 | 61A-W0078-A2-00 |
| Yamaha | 150TXRZ, LX150TXRZ, LZ150TXRZ, SX150TXRZ, VZ150TLRZ, Z150TXRZ | 150 | 2-Stroke | 2001 | 61A-W0078-A3-00 |
| Yamaha | F200TXRA, LF200TXRA | 200 | 4-Stroke | 2002 | 61A-W0078-A3-00 |
| Yamaha | F225TURA, F225TXRA, LF225TURA, LF225TXRA | 225 | 4-Stroke | 2002 | 61A-W0078-A3-00 |
| Yamaha | LX225TXRA, SX225TURA, SX225TXRA | 225 | 2-Stroke | 2002 | 61A-W0078-A3-00 |
| Yamaha | LX250TURA, LX250TXRA, SX250TURA, SX250TXRA | 250 | 2-Stroke | 2002 | 61A-W0078-A3-00 |
| Yamaha | LZ300TURC, LZ300TXRC | 300 | 2-Stroke | 2004 | 61A-W0078-A3-00 |
| Yamaha | F150JB, F150LB, F150LCA, F150XB, F150XCA, LF150XB, LF150XCA, VF150LA, VF150XA | 150 | 4-Stroke | 2021–2022 | 61A-W0078-A4-00 |
| Yamaha | F175LA, F175LCA, F175XA, F175XCA, LF175XCA, VF175LA, VF175XA | 175 | 4-Stroke | 2021–2022 | 61A-W0078-A4-00 |
| Yamaha | F200LB, F200LCA, F200XB, F200XCA, LF200LCA, LF200XB, LF200XCA | 200 | 4-Stroke | 2021–2022 | 61A-W0078-A4-00 |
Important: Yamaha model suffixes, shaft lengths, production years, and serial-number ranges can change the correct water-pump kit. Do not rely only on horsepower. Compare your complete engine model and the number on the existing kit before purchase.
Technical Specifications
- Product Type
- Water pump repair kit with housing
- Application
- Select Yamaha 150–300 HP outboards
- Installation
- Replacement water-pump assembly for the applicable engine catalog application
- Included Housing
- Yes
- Impeller
- Water-pump impeller
- Replacement References
- 61A-W0078-A2-00 and 61A-W0078-A3-00; later applications may use 61A-W0078-A4-00
- Brand Status
- Aftermarket replacement; not a Yamaha-branded OEM component
What's in the Box
- 1 x Water pump housing
- 1 x Water pump impeller — OEM reference 6E5-44352-01-00
- 1 x Insert cup/cartridge — OEM reference 61A-44322-00-00
- 1 x Wear plate — OEM reference 6G5-44323-01-00
- 1 x Water pump gasket — OEM reference 6E5-44315-A0-00
- 1 x Impeller key — OEM reference 90280-04M05-00
- 2 x Dowel pin — OEM reference 93606-12019-00
- 4 x Bolt washer — OEM reference 90209-08M02-00
- 1 x O-ring — OEM reference 93210-37M67-00
- 1 x O-ring — OEM reference 93210-86M38-00
Installation Notes
- Confirm the engine model, year, shaft configuration, and original water-pump reference before disassembly.
- Disconnect the battery and follow the engine manufacturer's service precautions.
- Remove the lower unit according to the service manual for your specific Yamaha outboard.
- Remove the existing water-pump housing, impeller, key, insert cup, wear plate, gasket, seals, pins, and hardware.
- Clean the mating surfaces and inspect the driveshaft, pump base, and surrounding components for corrosion or damage.
- Install the new gasket, wear plate, insert cup, impeller key, and impeller in the correct orientation.
- Install the housing over the impeller while rotating the driveshaft in the direction specified by the service manual so the impeller vanes seat correctly.
- Install the supplied pins, bolts, and washers. Tighten all fasteners to the torque specification for your exact engine.
- Reinstall the lower unit using the applicable service-manual procedure, then run the engine in a safe water supply and confirm a steady cooling-water tell-tale stream.
Professional installation is recommended. Improper lower-unit installation or incorrect fastener torque can damage the engine or create a safety hazard.
Maintenance and Troubleshooting
When should the water-pump impeller be replaced?
Inspect the impeller during scheduled maintenance and replace it when the vanes are cracked, permanently set, damaged, or worn. Replacement intervals depend on operating hours, storage conditions, saltwater exposure, and the manufacturer's service schedule.
What are common signs of a failing water pump?
Possible symptoms include a weak or missing tell-tale stream, overheating at idle, a temperature warning, damaged impeller vanes, or reduced cooling-water flow. Stop operation if the engine overheats and diagnose the cooling system before continued use.
Does this kit include the housing?
Yes. This listing is for the version with a water-pump housing and includes the component quantities shown in the package list.
Will a similar Yamaha part number guarantee fitment?
No. Yamaha water-pump references can vary by model family, stroke, year, shaft configuration, and serial-number range. Match the complete engine model and the original part number rather than relying on a similar-looking number or horsepower rating.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement kit. Yamaha names and part numbers are used only to identify the applicable engines and reference numbers.
Safety and Important Information
- Do not operate an outboard with an overheating warning or without confirmed cooling-water flow.
- Use the factory service manual for your exact model when removing or installing the lower unit.
- Verify the complete model designation, year, shaft configuration, serial range, and original water-pump reference before ordering.
- Inspect the driveshaft, pump base, seals, and fasteners during installation; replace damaged components as required.
About Sea Sierra
- Marine Replacement Parts — Practical aftermarket components for routine marine maintenance and repair.
- Application-Focused Information — Product references and fitment guidance are provided to help customers compare their exact engine details.
- Service-Minded Support — If your model or part number is not clearly listed, provide the complete engine identification before ordering.
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