Water Pump Impeller Service Kit without Housing for Yamaha Outboards 150–300 HP
Water Pump Impeller Service Kit without Housing for Yamaha Outboards 150–300 HP is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller Service Kit without Housing for Yamaha Outboard...
Water Pump Impeller Service Kit without Housing for Yamaha Outboards 150–300 HP is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller service kit without housing is designed for selected Yamaha outboard applications from 150 to 300 HP. It is intended to refresh the serviceable wear components inside an existing water pump assembly and help restore proper cooling-water circulation.
The kit is associated with Yamaha reference numbers in the 61A-W0078 series, as well as Sierra 18-3396-1 and Mallory 9-48618. Always compare the model, year, engine configuration, and original part number before ordering.
- Service replacement for the water pump wear components.
- Supplied without the main water pump housing.
- Includes an impeller, pump cup, wear plate, gasket, o-rings, key, dowel pins, and mounting bolts as listed below.
- Designed for installation in the existing water pump assembly when the housing is serviceable.
Part Number Matrix
The following references are provided for identification and cross-reference purposes. They should be checked against the engine model and service manual before purchase.
| Brand | Part Number |
|---|---|
| Yamaha | 61A-W0078 |
| Yamaha | 61A-W0078-A1-00 |
| Yamaha | 61A-W0078-A2-00 |
| Yamaha | 61A-W0078-A3-00 |
| Yamaha | 61A-W0078-A4-00 |
| Yamaha | 64L-W0078-00-00 |
| Yamaha | 65L-W0078-A0-00 |
| Sierra | 18-3396-1 |
| Mallory | 9-48618 |
Engine & Model Compatibility
The compatibility information below covers the Yamaha applications associated with this water pump service kit. Model suffixes, production years, shaft configurations, and serial-number breaks can affect fitment. Confirm your complete engine identification before installation.
| Brand | Model or Application | Rated HP | Stroke | Years or Range | Reference |
|---|---|---|---|---|---|
| Yamaha | 150C, 150F, LZ150, PX150, SX150, VX150, VZ150, Z150 | 150 | 2-Stroke | 1992 and later applications; individual ranges vary | 61A-W0078 series |
| Yamaha | 175B, 175D, VZ175, other listed 175 HP applications | 175 | 2-Stroke | 1992 and later applications; individual ranges vary | 61A-W0078 series |
| Yamaha | 200B, 200C, Pro V 200, 200F, 200G, L200, LX200, LZ200, SX200, VX200, VZ200, Z200 | 200 | 2-Stroke | 1992 and later applications; individual ranges vary | 61A-W0078 series |
| Yamaha | 225B, 225C, 225D, VX225 | 225 | 2-Stroke | 1992 and later applications; individual ranges vary | 61A-W0078 series |
| Yamaha | 250A, 250B, VX250 | 250 | 2-Stroke | 1991–2005 applications | 61A-W0078 series |
| Brand | Model or Application | Rated HP | Stroke | Years or Range | Reference |
|---|---|---|---|---|---|
| Yamaha | F200/LF200 | 200 | 4-Stroke | 2002 and later applications | 61A-W0078 series |
| Yamaha | F225 | 225 | 4-Stroke | 2002 and later applications | 61A-W0078 series |
| Yamaha | 150FETO, 175FETO, 200FETO | 150–200 | 4-Stroke | Confirm the exact year and model code | 61A-W0078 series |
| Yamaha | 250ETD, 250AETO, 250AET | 250 | 4-Stroke | Confirm the exact year and model code | 61A-W0078 series |
| Yamaha | LZ250, Z250 | 250 | 4-Stroke | 2003 and later applications | 61A-W0078 series |
| Yamaha | LZ300, Z300, Z300 with 6D0 reference | 300 | 4-Stroke | 2003 and later applications | 61A-W0078 series |
Important fitment note: The tables are application guidance, not a substitute for checking the complete model code, production year, serial-number range, shaft configuration, and the part number removed from your engine. Do not rely on horsepower alone.
Technical Specs
- Product Type
- Water pump impeller service kit without housing
- Application
- Selected Yamaha 150–300 HP outboard applications
- Installation
- Replacement service parts for an existing water pump assembly
- Housing
- Main water pump housing is not included
- Approximate Weight
- 100 g
- Construction
- Neoprene impeller with associated pump wear and sealing components
What’s in the Box
- 1 × Neoprene impeller — 6E5-44352-01-00
- 1 × Pump cup — 61A-44322-00
- 1 × Wear plate — 6G5-44323-00
- 1 × Water pump gasket — 6E5-44315-A0-00
- 1 × Woodruff key — 90280-04002-00
- 1 × O-ring — 93210-37M67-00
- 1 × O-ring — 93210-86M38-00
- 2 × Dowel pin — 93606-12019
- 4 × Bolt with washer — 90119-08M14-00
Not included: the main water pump housing. Reuse the existing housing only if it is within the manufacturer’s service limits and free from damaging wear, cracks, or distortion.
Installation Notes
- Disconnect the battery and remove the engine cover as required for access.
- Place the outboard in a secure position and remove the lower unit according to the manufacturer’s service procedure.
- Remove the water pump cover and inspect the housing, pump cup, wear plate, keyway, and mating surfaces.
- Remove the old impeller, plate, gasket, o-rings, key, and other service parts being replaced. Record their orientation before removal.
- Clean all mating surfaces carefully and remove old gasket material, corrosion, and debris.
- Install the new gasket, wear plate, pump cup, impeller, key, o-rings, dowel pins, and bolts in the correct order for your engine.
- Use a suitable marine lubricant during assembly as specified by the engine manufacturer. Do not install the impeller dry.
- Reinstall the pump cover and tighten fasteners to the manufacturer’s torque specifications.
- Reattach the lower unit, reconnect the battery, and refill gear lubricant if it was drained during service.
- Run the engine only with an adequate water supply, such as approved flushing muffs or a test tank, and verify a strong telltale stream and normal cooling-water operation.
Installation should be performed by a qualified marine technician when the model, serial range, or service procedure is uncertain.
Troubleshooting & FAQ
How can I confirm this kit fits my Yamaha outboard?
Match the complete engine model code and year against the compatibility information, then compare the removed part with the references in the Part Number Matrix. Model suffixes and serial-number breaks are important; horsepower alone is not sufficient.
Does this kit include the water pump housing?
No. This is a service kit without the main water pump housing. It is intended for replacement of the listed wear and sealing components in an existing pump assembly.
What are common signs of a worn impeller?
Symptoms can include a weak or intermittent telltale stream, overheating at idle or low speed, reduced cooling-water flow, or visible cracking and brittleness in the impeller vanes. Stop operation and investigate promptly if the engine overheats.
How often should the impeller be replaced?
Inspection and replacement intervals depend on the engine manufacturer’s schedule, operating hours, and water conditions. Inspect more frequently when operating in saltwater, sandy water, or silty conditions, and replace the impeller if the vanes are damaged, hardened, cracked, or permanently deformed.
Can the old housing be reused?
The housing may be reused only when it meets the manufacturer’s service limits. Deep grooves, cracks, distortion, corrosion, or excessive wear can prevent proper pump performance and may require housing replacement.
Is this an OEM component?
This listing is for an aftermarket replacement service kit, not a Yamaha-branded OEM assembly. Yamaha, Sierra, and Mallory references are provided for identification and cross-reference purposes.
What shipping and warranty support is available?
Typical standard transit is 5–15 days where available, with shipping options shown at checkout. The product is covered by a 1-year warranty against manufacturing defects under normal use. Returns are accepted within the applicable standard return window when the item is unused and in original condition; consult the applicable store policy for details.
Safety & Important Information
- Verify the complete engine model, year, serial range, stroke, and original part number before ordering.
- Do not operate the engine without an adequate water supply.
- Do not reuse damaged, excessively worn, cracked, or distorted pump components.
- Follow the engine manufacturer’s service manual for lower-unit removal, torque values, lubrication, and testing.
- This is an aftermarket replacement service kit and is not an OEM component.
- Professional installation is recommended when fitment or service procedures are uncertain.
About Sea Sierra
- Pro-Grade Standards — Marine replacement parts selected for dependable service in real-world operating conditions.
- Fast Global Fulfillment — Standard delivery options are available to most regions, with estimated transit shown at checkout.
- Manufacturer-Direct Value — Practical replacement solutions with clear application and package information.
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