SKU: 86616842044

Water Pump Impeller Repair Kit – Fits Yamaha F40/F70 4-Stroke (Replaces 6CJ-W0078-00/6CJ-W0078-01-00)

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Description

Water Pump Impeller Repair Kit – Fits Yamaha F40/F70 4-Stroke (Replaces 6CJ-W0078-00/6CJ-W0078-01-00)Water Pump Impeller Repair Kit Fits Yamaha F40 F70 4 Stroke (Replaces 6CJ W0078 00 6CJ W0078 01 00) This is a complete water pump impeller repair kit designed for Yamaha F40 (20112016) and F70 (20112016) 4 stroke outboard engines. It provides a reliable solution for maintaining your engine's cooling system. This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring broad compatibility for the specified engine

Water Pump Impeller Repair Kit – Fits Yamaha F40/F70 4-Stroke (Replaces 6CJ-W0078-00/6CJ-W0078-01-00)

This is a complete water pump impeller repair kit designed for Yamaha F40 (2011–2016) and F70 (2011–2016) 4-stroke outboard engines. It provides a reliable solution for maintaining your engine's cooling system.

This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring broad compatibility for the specified engine models. All components meet or exceed OEM specifications for a perfect fit and dependable performance.

  • Direct Installation: Manufactured to OEM specifications for a direct, hassle-free replacement of your existing water pump components.
  • Durable Materials: Features a premium rubber impeller for optimal flexibility and longevity, along with stainless steel hardware to resist corrosion in marine environments.
  • Comprehensive Kit: Includes all necessary components for a full water pump rebuild, from the impeller and housing to gaskets, seals, and bolts.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Yamaha 6CJ-W0078-00-00
Yamaha 6CJ-W0078-01-00
Quicksilver 8M6012800
Sierra 18-3494

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 F40 40 4-Stroke 2011-2016 6CJ-W0078-00-00/6CJ-W0078-01-00 Models 6CY1 to 6CY7
Yamaha F70 70 4-Stroke 2011-2016 6CJ-W0078-00-00/6CJ-W0078-01-00 Models 6CJ1 to 6CJ7

Technical Specifications

Specification Value
Product Type Water Pump Impeller Repair Kit
Installation Direct OEM replacement
Material Premium rubber (impeller), Stainless steel (hardware)
Compatibility F40 and F70 Yamaha 4-stroke outboards
Manufacturing Standards ISO9002 certified factory
Other Technical Attributes Manufactured to OEM specifications

Package Contents

The complete water pump repair kit includes:

  • 1 x Water Pump Impeller (Replaces 6CJ-W0078-00-00)
  • 1 x Housing Cover
  • 1 x Impeller Key
  • 1 x O-ring
  • 1 x Oil Seal
  • 1 x Wear Plate
  • 1 x Water Seal Damper
  • 1 x Set of Water Pump Gaskets
  • 1 x Pin
  • 1 x Set of Bolts and Washers

Installation Guide

  1. Prepare the Engine: Ensure the engine is turned off and disconnect the battery cables. Place the outboard in a secure, upright position.
  2. Access the Water Pump: Remove the lower unit (gearcase) from the outboard by unbolting it from the upper casing.
  3. Disassemble the Pump: Carefully unbolt and remove the water pump housing to expose the impeller and other components. Note the order of disassembly.
  4. Remove Old Components: Take out the old impeller, wear plate, key, gaskets, and seals. Clean any debris or corrosion from the housing and driveshaft area.
  5. Install New Components: Install the new wear plate, gasket, and impeller key. Slide the new impeller onto the driveshaft, rotating it in the direction of engine operation to set the vanes correctly.
  6. Reassemble the Pump: Place the new housing, seals, and gaskets over the impeller and bolt it down securely according to your service manual's torque specifications.
  7. Reattach Lower Unit: Reinstall the lower unit to the outboard, ensuring the driveshaft and water tube align correctly.
  8. Test Operation: Reconnect the battery, supply water to the engine using a flush device, and start it. Check for a strong, steady stream from the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this kit fits my engine?
Verify your engine is a Yamaha F40 (models 6CY1 to 6CY7) or F70 (models 6CJ1 to 6CJ7) from the years 2011–2016. You can also cross-reference your existing part number with the OEM numbers 6CJ-W0078-00-00 or 6CJ-W0078-01-00.

What are the signs that my water pump impeller needs replacement?
Common signs include the engine overheating at idle or low speeds, a weak or non-existent water stream from the tell-tale outlet, or visible damage such as cracked, brittle, or missing vanes on the impeller upon inspection.

How often should I replace the water pump impeller?
For optimal engine protection, it is recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, whichever comes first. Usage in saltwater or silty/sandy water may require more frequent replacement.

OEM vs. Aftermarket?
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 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:
  1. 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
SKU: 86616842044

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JENNA
Lowell, US
★★★★★ 5
Toddler boy loves them!!
Size: 9 Toddler, Color: Purple, Size: 9 Toddler, Color: Purple
My toddler boy absolutely loves the color purple and he squealed with delight when he got these from the Easter bunny. They are true to size and he says they are very comfortable to wear. Easy for him to slip on by himself. He decorated them with sea animals and they are his favorite shoes to wear every day! They’ve held up great over the last month so far. Photo included of his favorite way to wear them (on the wrong feet lol). Will definitely purchase another purple pair when these get too small.
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Reviewed in the United States on April 19, 2026
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Megan
Port Orchard, US
★★★★★ 5
Great kids shoe
Size: 3 Big Kid, Color: Mystic Purple, Size: 3 Big Kid, Color: Mystic Purple
I just love how easy these are for kids to slip and go. Fits my daughter great, love the color and love that she can design the look with the charms!
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Reviewed in the United States on May 1, 2026
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Lynnora Bierce
Chelsea, US
★★★★★ 5
Perfect pristine condition
Size: 12 Little Kid, Color: Mint Tint
Bought this in a neutral light green for my grandson's extra shoes for his weekend visits. Got a size larger than what he wears now, so he has to wear them "four-wheel drive" (w/ straps). Honestly, I just got the cheapest in this size, because he's at that big growth time, and they'll end up in the charity box before he wears them out. Crocs are of a good quality, and seem ideal for little growing feet. They clean up easily in the dishwasher or with a little scrub in the sink. They're easily replaced, and if they get swept up by the wind and deposited into a lake, they will float and may be easily fetched up in a net and returned to the owner (true story). Crocs dry fast, and keep feet from lingering odors without additives.
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Reviewed in the United States on March 1, 2026
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The Prime Perspective
New York, US
★★★★★ 5
They Shouldn’t Work But Here We Are
Size: 13 Little Kid, Color: Mystic Purple
Let’s address the elephant in the room: Crocs look like a rubber cheese grater had a baby with a sandal. And yet somehow these things are a parenting cheat code. The comfort is unreal (10/10). Kids slip them on and suddenly they’re walking on clouds, bouncing around like tiny caffeinated marshmallows. Cleaning them is almost suspiciously easy (10/10) mud, juice, questionable playground goo just rinse and move on like nothing ever happened. The ventilation holes (9/10) actually do their job, keeping little feet from becoming sweaty disasters, though they also double as convenient entry points for sand, pebbles, and whatever treasures your kid decides to collect. Style wise (7/10), look… no one is winning fashion awards here, but kids love them and confidence is half the battle. The heel strap (9/10) deserves a medal flip it back and suddenly your child enters “sport mode” like a video game character with boosted speed stats. The color options (10/10) are wild enough to satisfy even the most chaotic tiny human, from neon explosions to surprisingly normal shades. They’re ridiculously lightweight (10/10), which is great until your kid forgets they’re wearing them and tries to wear them to bed. Durability (9/10) is solid they can handle running, jumping, puddle stomping, and general kid nonsense without falling apart. And the independence factor (10/10) Huge. No laces, no struggle, no dramatic “I can’t do it!” moments just slip on and go. Crocs as a brand (9/10) clearly know their lane comfort over cool, and honestly, it works. Final Score: 9.2/10 They may not be pretty, but they’re practical, indestructible, and weirdly lovable like the chicken nuggets of footwear
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Reviewed in the United States on March 29, 2026
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Drea
Omaha, US
★★★★★ 5
Comfy and great quality
Size: 3 Little Kid, Color: Blue Bolt
Perfect fit and comfortable!
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Reviewed in the United States on May 15, 2026

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