Water Pump Repair Kit – Fits Yamaha Outboard 150-300 HP (Replaces 61A-W0078-A2-00)
Water Pump Repair Kit – Fits Yamaha Outboard 150-300 HP (Replaces 61A-W0078-A2-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Repair Kit – Fits Yamaha Outboard 150-300 HP (Replaces 6...
Water Pump Repair Kit – Fits Yamaha Outboard 150-300 HP (Replaces 61A-W0078-A2-00) is backordered and will ship as soon as it is back in stock.
Product Details
This complete Water Pump Repair Kit – Fits Yamaha Outboard 150-300 HP (Replaces 61A-W0078-A2-00, 61A-W0078-A3-00) with housing is designed for Yamaha outboard engines ranging from 150 to 300 horsepower. It fits both 2-stroke and 4-stroke V6 models from the mid-1990s through current production.
This kit provides a direct interchange for Yamaha part numbers 61A-W0078-A2-00, 61A-W0078-A3-00, 61A-W0078-A4-00, 64L-W0078-00-00, and 65L-W0078-A0-00, as well as Sierra 18-3396-1 and Mallory 9-48618.
- Includes a durable nylon housing and neoprene impeller for reliable performance.
- Engineered for direct-fit, hassle-free installation.
- Complete kit with all necessary gaskets, O-rings, and hardware.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| 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
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F150 | 150 | 4-Stroke | All Years | 61A-W0078-A3-00 | Multiple generations |
| Yamaha | LF150 | 150 | 4-Stroke | All Years | 61A-W0078-A3-00 | |
| Yamaha | F175 | 175 | 4-Stroke | 2002–present | 61A-W0078-A3-00 | |
| Yamaha | F200 | 200 | 4-Stroke | 2002–present | 61A-W0078-A3-00 | Both V6 and inline 4 models |
| Yamaha | F225 | 225 | 4-Stroke | 2002–present | 61A-W0078-A3-00 | |
| Yamaha | F250 | 250 | 4-Stroke | 2005–present | 61A-W0078-A3-00 | |
| Yamaha | VF175/VF200/VF225/VF250 | 175-250 | 4-Stroke | 2011–present | 61A-W0078-A3-00 | SHO Series |
| Yamaha | 150/175/200/225/250/300 | 150-300 | 2-Stroke | 1992–2009 | 61A-W0078-A3-00 | Includes S, SX, V, VX, VZ, Z, P, C, LX, LZ prefix variants |
Technical Specs
- Product Type
- Water Pump Repair Kit with Housing
- Installation
- Direct Replacement
- Housing Material
- Nylon PA66 Plastic Housing, Stainless Steel Insert Cup and Wear Plate
- Impeller Material
- Neoprene Rubber
- Gasket/O-Ring Material
- Neoprene Rubber
- Warranty
- 1 Year (may vary by seller)
What’s in the Box
- 1 x Cartridge Insert (61A-44322-02-00)
- 1 x O-Ring (93210-86M38-00)
- 1 x O-Ring (93210-37M67-00)
- 1 x Impeller (6E5-44352-01-00)
- 1 x Cartridge Outer Plate (6G5-44323-01-00/6G5-44323-00-00)
- 1 x Water Pump Gasket (6E5-44315-A0-00)
- 2 x Dowel Pins (93606-12019-00)
- 4 x Bolts with Washers (90119-08M14-00)
- 1 x Woodruff Key (90280-04M05-00)
- Note: Some versions may also include the Water Pump Housing (61A-44311-01-00), Water Seal Dampener (6E5-44365-01-00), and Water Pump Housing Cover (6E5-44312-00-00).
Installation Notes
- Disconnect the negative battery cable and remove the engine cover.
- Disconnect the shift linkage from the engine.
- Remove the lower unit mounting bolts and carefully lower the gearcase from the engine.
- Unbolt and remove the old water pump housing assembly from the lower unit.
- Thoroughly clean the driveshaft and mating surfaces, removing any old gasket material or debris.
- Install the new woodruff key, impeller, gaskets, and plates in the correct sequence as per your service manual.
- Lightly grease the new bolts and the interior of the housing cup before installing the new housing.
- Reinstall the lower unit, ensuring the driveshaft, water tube, and shift shaft are correctly aligned. Tighten bolts to specification.
- Reconnect the shift linkage and battery. Test run the engine in water, confirming a strong stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if my water pump is failing?
Common signs include a weak or no water stream from the tell-tale (water outlet), engine overheating alarms or limp mode activation, and a visibly dry, brittle, or cracked impeller upon inspection.
What is the recommended replacement interval?
For best performance and engine safety, inspect the impeller annually and replace the entire water pump kit every 1-2 years or every 100-200 hours of operation, especially if operating in saltwater or debris-heavy water.
Will this fit both V6 and inline 4-cylinder F200 models?
Yes, the compatibility chart confirms this kit fits both V6 and the newer inline 4-cylinder versions of the Yamaha F200 manufactured from 2002 to the present.
Does this kit include the main plastic housing?
Yes, this is typically sold as a complete kit including the water pump housing, cartridge, impeller, and all necessary gaskets and hardware. However, contents can vary slightly by seller, so always verify the "What's in the Box" list before purchasing.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 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 issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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