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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
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Reviewed in the United States on March 30, 2026
★★★★★ 5
Good product for the price
I bought for my Worx trimmer and they work great. Even though Worx offers free replacements, when you add shipping onto the "Free" order..it costs more...this price is well worth it.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Fits my weed eater perfectly
Fits perfect and does a great job. Easy to install. 15 pcs will last a ling time
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Reviewed in the United States on May 2, 2026
★★★★★ 3
String breaks about halfway
Just as pictured. PROBLEM…..LINE BREAKS ABOUT THE MIDDLE OF THE SPOOL…. Wound so tightly that once you have used the first half it is impossible to use the rest…. So guess what…I have to buy more!
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Reviewed in the United States on May 29, 2026
★★★★★ 5
FAST. Powerful. Easy to use.
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I got my new edger today, and I am astonished at the results! ruler straight edging, 2 1/2" deep and 1/4" wide. PERFECT! . . . and the whole front yard took less than 10 minutes! The edger is very powerful - it easily cut through the sod, deep into the dirt underneath leaving a nice clean edge. My neighbor has a lawncare company, and he was watching me. He came over and said he was going to get one for his jobs, as it is much faster and easier to use.
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