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Description
Water Pump Impeller Repair Kit – Fits Yamaha 50-70 HP Outboards (Replaces 6H3-W0078-A0-00, 6H3-W0078-02-00)Water Pump Impeller Repair Kit Fits Yamaha 50 70 HP Outboards (Replaces 6H3 W0078 A0 00, 6H3 W0078 02 00) This aftermarket water pump impeller repair kit is designed for Yamaha 2 Stroke 6070 HP (19972003) and 4 Stroke 5060 HP High Thrust (1997present) outboard motors. It provides an essential solution for lower unit water pump maintenance and rebuilds. Direct replacements include Yamaha part numbers 6H3 W0078 00 00, 6H3 W0078 01 00, 6H3 W0078 02 00,
Water Pump Impeller Repair Kit – Fits Yamaha 50-70 HP Outboards (Replaces 6H3-W0078-A0-00, 6H3-W0078-02-00)
This aftermarket water pump impeller repair kit is designed for Yamaha 2-Stroke 60–70 HP (1997–2003) and 4-Stroke 50–60 HP High Thrust (1997–present) outboard motors. It provides an essential solution for lower unit water pump maintenance and rebuilds.
Direct replacements include Yamaha part numbers 6H3-W0078-00-00, 6H3-W0078-01-00, 6H3-W0078-02-00, 6H3-W0078-A0-00, as well as Sierra numbers 18-3466, 18-3461, and 18-3428-1.
- Complete water pump rebuild kit including impeller, gaskets, and hardware
- Fits installation on lower unit
- Compatible with both 2-Stroke and 4-Stroke Yamaha models
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 6H3-W0078-00-00 |
| Yamaha | 6H3-W0078-01-00 |
| Yamaha | 6H3-W0078-02-00 |
| Yamaha | 6H3-W0078-A0-00 |
| Sierra | 18-3466 |
| Sierra | 18-3461 |
| Sierra | 18-3428-1 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Yamaha owners, here's a guide to help you identify your engine's serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 60F | 60 | 2-Stroke | 1997-2003 | 6H3-W0078-A0-00 | |
| Yamaha | 60TLR | 60 | 2-Stroke | 2001-2003 | 6H3-W0078-A0-00 | Including 60TLRZ (2001), 60TLRA (2002), 60TLRB (2003) |
| Yamaha | 70B | 70 | 2-Stroke | 1997-2003 | 6H3-W0078-A0-00 | |
| Yamaha | 70TLR | 70 | 2-Stroke | 1997-2003 | 6H3-W0078-A0-00 | Including 70TLRV (1997) through 70TLRB (2003) |
| Yamaha | C60TLR | 60 | 2-Stroke | 1997-2001 | 6H3-W0078-A0-00 | Models C60TLRV through C60TLRZ |
| Yamaha | C70TLR | 70 | 2-Stroke | 2000-2001 | 6H3-W0078-A0-00 | Models C70TLRY and C70TLRZ |
| Yamaha | P60TLH | 60 | 2-Stroke | 1997-1999 | 6H3-W0078-A0-00 | Models P60TLHV through P60TLHX |
| Yamaha | T50 | 50 | 4-Stroke | 1997-Present | 6H3-W0078-A0-00 | High Thrust models; includes T50TLRV through current |
| Yamaha | FT50 | 50 | 4-Stroke | 1997-Present | 6H3-W0078-A0-00 | High Thrust models; includes FT50B through current |
| Yamaha | F50TLH | 50 | 4-Stroke | 1997 | 6H3-W0078-A0-00 | Model F50TLHV |
| Yamaha | F50TLR | 50 | 4-Stroke | 1997 | 6H3-W0078-A0-00 | Model F50TLRV |
| Yamaha | T60 | 60 | 4-Stroke | 2003-Present | 6H3-W0078-A0-00 | High Thrust models; includes T60TLRB through current |
| Yamaha | FT60 | 60 | 4-Stroke | 2003-Present | 6H3-W0078-A0-00 | High Thrust models; includes FT60B through current |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Impeller Repair Kit |
| Installation | Lower Unit |
| Weight | ~250 g (8.8 oz) |
| Warranty | Standard Manufacturer Warranty |
| Other Technical Attributes | Complete water pump rebuild kit including impeller, gaskets, and hardware |
Package Contents
- 1 x Cartridge Insert (663-44322-00-00)
- 1 x Impeller (6H3-44352-01/697-44352-00)
- 1 x Water Pump Gasket (6H3-44315-A0-00)
- 1 x Cartridge Outer Plate/Wear Plate (6H3-44323-00-00)
- 1 x Cartridge Gasket (6H3-44324-A0-00)
- 1 x Water Pump Gasket (688-44316-A0-00)
- 1 x O-Ring (93210-46044-00)
- 2 x Bolts (97095-08045-00)
- 2 x Bolts (97395-08055-00)
- 1 x Woodruff Key (90280-03M03-00)
Installation Guide
- Remove the lower unit from the outboard motor following manufacturer safety guidelines.
- Drain any remaining water from the lower unit before disassembly.
- Remove the old water pump housing and impeller carefully to avoid damage to surrounding parts.
- Inspect the housing and replace any damaged parts as necessary.
- Install the new impeller and associated gaskets included in the kit.
- Replace the cartridge insert, outer plate, and gaskets in proper order.
- Secure all bolts and hardware to manufacturer torque specifications.
- Reinstall the lower unit onto the outboard motor.
- Test operation to ensure proper water flow and no leaks.
Troubleshooting & FAQ
- How do I confirm this fits my engine?
- Check the compatible engine models table for your model and year. Use the Yamaha Serial Number Guide linked above to verify your engine details.
- What are the differences between this aftermarket kit and OEM parts?
- This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
- How often should I replace the water pump impeller?
- It is recommended to inspect and replace the water pump impeller at least once per boating season or every 100 hours of operation, whichever comes first.
- What are common signs of water pump failure?
- Reduced water flow from the cooling system, engine overheating, and unusual noises may indicate water pump failure or impeller damage.
- How fast do you ship and how much does it cost?
- We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
- What is your warranty and return policy?
- This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
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Product Reviews
★★★★★ 5
Great quality and folding it in half is a plus. Fits under a seat in car/truck.
Purchased another, as we need one in each car. This is a great ball thrower, especially as it folds in a half. Makes it easy to store under a car/truck seat. Haven’t had any problem with it, great quality!
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Fantastic throwing aid!
Very well made, great quality and doesn't feel cheap at all. It's thick, not flimsy or fragile so you can really swing it to launch a ball. Saves my body that I don't have to bend over to pick up the ball anymore, and saves my shoulder that I don't have to hurl the ball anymore. Another bonus is you don't have to touch a slobbered, soggy ball, or a ball covered in dirt.
The foldable design is fantastic because I walk everywhere with my dog and don't want to carry around a long stick that's awkward to hold. This folds down small enough that I can securely put it in the back pocket of my jeans without worrying about it falling out. The thing I love most about it is there's a elastic loop at the end so when you fold it you can latch it securely. This small detail is outstanding because I can also hang it on the strap of my sling bag and with the loop secured it will not slip off the strap.
This product is so well made and thought out overall.
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Reviewed in the United States on February 14, 2024
★★★★★ 5
Excellent toy for play
My dog would play all day if I threw the ball to him. He loves this even though he's 12. The scooped end allows you to pick up the ball without touching it. After a few runs it's covered in dog slobber. So that's a major plus for me! Also, some health issues affect my walking and bending at times. This helps with the bending. This is a great game to play with your favorite friend!
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Your high-energy dog will love it!
Why did I wait so long to get one of these?!? I am the stereotypical throws-like-a-girl person, and my dog really needs to have an option that forces her to run far and fast. This is it. I can get that ball half a soccer field away at a minimum if I want. The ball is super bouncy, which adds an element of fun to her attempts to tame it and bring it back. Super worth the money (which wasn't much!).
I've never had one of these before, so can't compare to the non-folding version. This one is easy to carry and fits in a drawer for storrage. No way you can fit it in a pocket, especially if you have a phone in one and dog treats in the other.
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Great usability
I prefer this version over the non-foldable stick, as this one I can fit into my bag and carry it out easily. Great size and has a locking feature to prevent it from folding up when throwing. Highly recommend, my dogs love fetch and it is hard to chew if they get their hands on it.
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Reviewed in the United States on September 13, 2025