Yamaha Outboard Water Pump Repair Kit Without Housing – 2-Stroke 150–250 HP and 4-Stroke F150/F200/F225 (OEM 61A-W0078-A3)
Yamaha Outboard Water Pump Repair Kit Without Housing – 2-Stroke 150–250 HP and 4-Stroke F150/F200/F225 (OEM 61A-W0078-A3) is backordered and will ship as soon as it is back in stock.
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Yamaha Outboard Water Pump Repair Kit Without Housing – 2-Stroke 15...
Yamaha Outboard Water Pump Repair Kit Without Housing – 2-Stroke 150–250 HP and 4-Stroke F150/F200/F225 (OEM 61A-W0078-A3) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Yamaha outboard water pump repair kit is supplied without the water pump housing. It is intended for servicing the water pump assembly on selected Yamaha 2-stroke and 4-stroke outboards. The kit is associated with Yamaha OEM reference 61A-W0078-A3 and aftermarket reference 18-3395.
Because this is a repair kit without a housing, the existing water pump housing must be reusable and in suitable condition before installation. Always compare the engine model, stroke, year range, and original part number before ordering.
- Water pump service kit for selected Yamaha outboard engines.
- Supplied without the water pump housing.
- Aftermarket replacement for water pump repair applications.
- Designed to restore proper water pump service components when matched to the correct engine application.
Part Number Matrix
Use these references to compare the repair kit with your original part and service documentation.
| Reference Type | Part Number |
|---|---|
| Yamaha OEM reference | 61A-W0078-A3 |
| Yamaha OEM reference format | 61A-W0078-A3-00 |
| Aftermarket reference | 18-3395 |
Engine & Model Compatibility
The company fitment data identifies the following Yamaha applications. Year ranges and model designations must remain together when checking compatibility.
| Stroke | Engine or Model Group | Year or Condition | Reference |
|---|---|---|---|
| 2-Stroke | P150 | 1992–1996 | 61A-W0078-A3 |
| 2-Stroke | P175 | 1994–1996 | 61A-W0078-A3 |
| 2-Stroke | P200 | 1991–1996 | 61A-W0078-A3 |
| 2-Stroke | C150 | 1996 | 61A-W0078-A3 |
| 2-Stroke | 150–225 HP | 1996 | 61A-W0078-A3 |
| 2-Stroke | L150–L250 | 1996 | 61A-W0078-A3 |
| 2-Stroke | S150–S250 | 1996 | 61A-W0078-A3 |
| 2-Stroke | 225 HP and 250 HP | 1992–2023 | 61A-W0078-A3 |
| 2-Stroke | S150, SX150, S200, SX200, S250, SX250, V150–V250, VX150–VX250, VZ150–VZ200 (2.6L), Z150–Z300, P150–P200, C150 | 1997–1999 | 61A-W0078-A3 |
| 2-Stroke | PX150 | 1999 | 61A-W0078-A3 |
| 4-Stroke | F150, F200, F225 | Verify the complete engine model before ordering | 61A-W0078-A3 |
Technical Specs
- Product Type
- Outboard water pump repair kit
- Housing
- Not included; service kit supplied without water pump housing
- Application
- Selected Yamaha 2-stroke and 4-stroke outboard water pump assemblies
- Primary OEM Reference
- 61A-W0078-A3
- OEM Reference Format
- 61A-W0078-A3-00
- Aftermarket Reference
- 18-3395
- Part Status
- Aftermarket replacement
What’s in the Box
This listing is for one water pump repair kit supplied without the water pump housing. The company product record does not specify a component-by-component quantity list, so please use the product image and your original water pump assembly for final component confirmation.
- 1 x Water pump repair kit
- Water pump housing not included
Installation Notes
- Confirm the complete Yamaha engine model, stroke, year range, and original water pump reference before beginning work.
- Disconnect the battery and place the outboard in a secure service position.
- Remove the lower unit according to the engine manufacturer’s service procedure.
- Remove the water pump cover and carefully record the order and orientation of the existing components.
- Inspect the existing water pump housing, shaft, keyway, and mating surfaces. Do not reuse damaged or excessively worn housing components.
- Remove old service components and clean all sealing and mating surfaces thoroughly.
- Install the repair kit components in the correct order, using the applicable Yamaha service manual for the engine being serviced.
- Reassemble the water pump and lower unit, tightening fasteners to the manufacturer’s specified torque.
- Run the engine only with an adequate water supply and verify a consistent cooling-water telltale stream before returning the outboard to service.
Troubleshooting & FAQ
Which Yamaha outboards does this repair kit fit?
The company fitment data covers selected Yamaha 2-stroke P, C, L, S, V, SX, VX, VZ, Z, and PX applications, together with 4-stroke F150, F200, and F225 applications. The applicable year and model conditions are listed in the compatibility table. Confirm the complete model designation before ordering.
Does the kit include the water pump housing?
No. This is a water pump repair kit supplied without the water pump housing. It is intended for installation in a suitable existing housing.
What is the main OEM reference?
The primary OEM reference recorded for this product is 61A-W0078-A3, also shown in the 61A-W0078-A3-00 format. The aftermarket reference is 18-3395.
How can I confirm compatibility?
Match the complete engine model, horsepower, stroke, year range, and original water pump reference. Do not rely on horsepower alone, because similar horsepower ratings can use different water pump assemblies.
When should a water pump repair kit be replaced?
Inspect the water pump during scheduled maintenance and whenever the engine shows reduced cooling-water flow, overheating warnings, or other cooling-system symptoms. Follow the engine manufacturer’s maintenance interval and replace worn, brittle, or damaged service components.
Can I install this kit myself?
Installation requires lower-unit removal and correct water pump component orientation. If you do not have the applicable service manual or suitable mechanical experience, professional installation is recommended.
Is this an OEM part?
No. This listing is for an aftermarket replacement repair kit that references the Yamaha OEM part number for compatibility identification.
Safety & Important Information
- Verify the complete engine model, stroke, year range, and original part reference before purchase.
- This kit is supplied without the water pump housing.
- Inspect the existing housing and related components for wear or damage before installation.
- Use the correct service manual and manufacturer torque specifications during installation.
- Never run an outboard without an adequate water supply.
- This is an aftermarket replacement, not a Yamaha-branded OEM component.
About Sea Sierra
- Marine replacement parts for routine service and repair applications.
- Product information organized around engine model and part-number matching.
- Practical replacement solutions for maintaining outboard cooling systems.
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