Water Pump Repair Kit for Yamaha 115 & 150 HP 2-Stroke Outboard Engines – OEM Reference 65N-W0078-A1
Water Pump Repair Kit for Yamaha 115 & 150 HP 2-Stroke Outboard Engines – OEM Reference 65N-W0078-A1 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Water Pump Repair Kit for Yamaha 115 & 150 HP 2-Stroke Outboard...
Water Pump Repair Kit for Yamaha 115 & 150 HP 2-Stroke Outboard Engines – OEM Reference 65N-W0078-A1 is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit for Yamaha 115 & 150 HP 2-Stroke Outboard Engines is intended for applicable Yamaha 115 HP and 150 HP 2-stroke outboards. It supplies the primary components needed for a complete water pump service without the water pump housing.
The kit is associated with Yamaha OEM reference 65N-W0078-A1. Confirm the engine model, stroke, and existing water-pump assembly before ordering.
- Designed as a replacement water pump service kit.
- Includes impeller, gaskets, plates, cartridge components, fasteners, key, O-rings, and dowel pins as listed below.
- For applicable Yamaha 2-stroke outboard applications only.
Part Number Reference
Use the following manufacturer reference when comparing your original water pump parts.
| Brand | Part Number | Reference Type | Notes |
|---|---|---|---|
| Yamaha | 65N-W0078-A1 | OEM reference | Listed for 115 and 150 HP 2-stroke applications in the consulted application catalog. |
Engine & Model Compatibility
Compatibility is application-specific. Verify the complete engine model and the water-pump configuration before installation.
| Brand | Application | Rated HP | Stroke | Years | OEM Reference | Notes |
|---|---|---|---|---|---|---|
| Yamaha | Applicable Yamaha outboard models | 115 | 2-Stroke | Not specified | 65N-W0078-A1 | Confirm the exact model and serial range before purchase. |
| Yamaha | Applicable Yamaha outboard models | 150 | 2-Stroke | Not specified | 65N-W0078-A1 | Confirm the exact model and serial range before purchase. |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- Replacement service installation
- Housing
- Water pump housing is not included
- Housing Material
- Rubber, plastic, and metal components
- Dimensions
- 20.0 cm L x 11.3 cm W x 13.0 cm H
- Engine Compatibility
- Applicable Yamaha 2-stroke 115 HP and 150 HP outboard engines
What’s in the Box
- 1 x Insert, Cartridge (61A-44322-02-00)
- 1 x Gasket, Water Pump (65N-44315-A0-00)
- 1 x Outer Plate, Cartridge (65N-44323-00-00)
- 1 x Impeller (6E5-44352-01-00)
- 4 x Bolt, With Washer (90119-08M14-00)
- 1 x Woodruff Key (90280-04M05-00)
- 1 x O-Ring (93210-37M67-00)
- 1 x O-Ring (93210-86M38-00)
- 2 x Dowel Pin (93606-12019-00)
Installation Notes
- Disconnect the battery and shift linkage.
- Remove the lower-unit mounting bolts and carefully lower the unit.
- Unbolt and remove the water-pump housing.
- Remove the old impeller, plate, and gaskets. Note the orientation of the impeller vanes.
- Clean all mating surfaces thoroughly and remove old gasket material and corrosion.
- Install the new Woodruff key, gaskets, cartridge insert, and plate.
- Slide the new impeller onto the driveshaft while turning it in the correct direction to bend the vanes properly.
- Install the new O-rings and reinstall the pump housing. Torque fasteners to the engine manufacturer’s specifications.
- Reinstall the lower unit, ensuring that the water tube and driveshaft align correctly.
- Reconnect the shift linkage and battery, then test the engine with an appropriate water supply to verify cooling flow.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha outboard?
This kit is intended for applicable Yamaha 115 HP and 150 HP 2-stroke outboards associated with OEM reference 65N-W0078-A1. Check the full engine model, serial range, stroke, and original water-pump parts before ordering.
What is included with the kit?
The package contents are listed in the “What’s in the Box” section. The water-pump housing is not included.
What are the signs of a failing water pump?
Common signs include engine overheating, a weak or absent tell-tale water stream, or an impeller that is dry, cracked, brittle, or deformed.
How often should the water pump impeller be replaced?
Inspect the impeller according to the engine manufacturer’s maintenance schedule and replace it when wear, damage, deformation, or reduced cooling flow is found. Service intervals may vary with operating hours and water conditions.
Is this kit for 2-stroke or 4-stroke engines?
This listing is for applicable Yamaha 2-stroke outboard applications. It is not listed for 4-stroke applications.
Is this an OEM component?
This listing is for an aftermarket replacement kit. Yamaha reference numbers are provided only for application identification and comparison.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If an issue arises, contact support with your order details. Returns are accepted within the standard return window when the item is unused and in its original condition.
Safety & Important Information
- Verify the engine model, serial range, stroke, and original parts before purchase.
- Compare the component configuration and dimensions with the existing water-pump assembly.
- This is an aftermarket replacement kit, not a Yamaha-branded OEM component.
- Professional installation is recommended for safe and reliable operation.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered for dependable service in real-world operating conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing with attention to materials and quality control.
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