SKU: 28598821285

Water Pump Impeller Kit – Fits Yamaha F40/F70 4-Stroke 2010-2016 (Replaces 6CJ-W0078-00, 6CJ-W0078-01)

Sale price$33.75 Regular price$37.50
Save 10%

Pay in installments of $9.38 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 22 - Aug 27

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Water Pump Impeller Kit – Fits Yamaha F40/F70 4-Stroke 2010-2016 (Replaces 6CJ-W0078-00, 6CJ-W0078-01)Water Pump Impeller Kit Fits Yamaha F40 F70 4 Stroke 2010 2016 This complete water pump impeller service kit is designed for Yamaha 4 Stroke outboard models, specifically the F40 (6CY) from 20112016 and the F70 (6CJ) from 20102016. It includes all necessary components to service and rebuild the lower unit water pump assembly, ensuring optimal engine cooling. This kit is a direct replacement for Yamaha OEM part numbers 6CJ W0078 00 00 and 6CJ W0078 01

Water Pump Impeller Kit – Fits Yamaha F40/F70 4-Stroke 2010-2016

This complete water pump impeller service kit is designed for Yamaha 4-Stroke outboard models, specifically the F40 (6CY) from 2011–2016 and the F70 (6CJ) from 2010–2016. It includes all necessary components to service and rebuild the lower unit water pump assembly, ensuring optimal engine cooling.

This kit is a direct replacement for Yamaha OEM part numbers 6CJ-W0078-00-00 and 6CJ-W0078-01-00. It also cross-references with Sierra 18-3494 and Forestity 6CJ-W0078-00.

  • Includes a high-performance neoprene impeller, gaskets, plates, and seals for a complete overhaul.
  • Designed for installation in the lower unit/gearcase.
  • Built to meet or exceed OEM specifications for reliable performance.

Part Number Cross-Reference

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

Brand Part Number Superseded By
Yamaha 6CJ-W0078-00-00 6CJ-W0078-01-00
JLM Marine AM6CJ-W0078-00
Sierra 18-3494
Forestity 6CJ-W0078-00

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 2010-2016 6CJ-W0078-00-00, 6CJ-W0078-01-00 Models 6CJ1 to 6CJ7
Yamaha F70LA 70 4-Stroke 2010-2021 6CJ-W0078-00-00, 6CJ-W0078-01-00 Also F70LA2 models

Technical Specifications

Specification Value
Product Type Water Pump Impeller Service Kit
Installation Lower Unit / Gearcase
Connection Direct Drive
Other Technical Attributes Genuine OEM and high-quality aftermarket options available

Package Contents

This comprehensive kit includes the following components:

  • 1 x Insert, Cartridge (63D-44322-00-00)
  • 1 x Gasket, Water Pump (6CJ-44315-00-00)
  • 1 x Cover, Pump Housing (63D-44312-00-00)
  • 1 x Damper, Water Seal 2 (Replaces 663-44366-00-00 / 663-44366-01-00)
  • 1 x Impeller (6H3-44352-00-00)
  • 1 x Key, Woodruff (90280-03M03-00)
  • 2 x Oil Seal (93101-23070-00)
  • 1 x O-Ring (93210-46044-00)
  • 1 x Gasket, Water Pump (6CJ-44316-00-00)
  • 1 x Outer Plate, Cartridge (6CJ-44323-00-00)
  • 1 x Gasket, Cartridge (6CJ-44324-00-00)
  • 2 x Pin, Dowel (93604-10M03-00)
  • 2 x Bolt, With Washer (90119-08M33-00)
  • 2 x Bolt, With Washer (90119-08M14-00)

Explosion Diagram

Installation Guide

  1. Disconnect the battery and shift the outboard into neutral.
  2. Remove the lower unit (gearcase) bolts and carefully lower the unit from the outboard.
  3. Unbolt the 4-bolt water pump housing and slide it up the driveshaft.
  4. Clean the mating surfaces and remove the old impeller, key, gaskets, and plates. Note their orientation.
  5. Install the new seals, gaskets, and Woodruff key from the kit.
  6. Slide the new impeller down the driveshaft and into the housing, rotating the driveshaft clockwise to seat the vanes correctly.
  7. Install the new housing, cartridge, and associated components as per the diagram.
  8. Torque all bolts to the manufacturer's specifications.
  9. Reinstall the lower unit, ensuring the driveshaft, water tube, and shift shaft are correctly aligned.
  10. Test the engine on a water supply, confirming a strong, steady stream from the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this fits my engine?

This kit is confirmed to fit Yamaha F40 and F70 models from 2010-2016 that use OEM part 6CJ-W0078-01-00. The compatibility table lists specific models like F40 (6CY) and F70 (6CJ). While some sources suggest it may fit F70LA models up to 2021, we recommend verifying your engine serial number and existing part numbers before ordering.

What are the signs my water pump needs replacing?

A weak or no water stream from the engine's tell-tale outlet is the most common sign. Other indicators include the engine overheating alarm activating or finding cracked, stiff, or damaged vanes on the impeller during a visual inspection.

How often should I replace the water pump impeller kit?

For preventative maintenance, it is best practice to replace your water pump impeller and gaskets every 2 to 3 years or every 200-300 hours of operation, especially for boats used in saltwater.

My old part is 6CJ-W0078-00-00. Will this kit work?

Yes. Yamaha officially superseded part number 6CJ-W0078-00-00 to 6CJ-W0078-01-00. This kit is the correct replacement for both OEM part numbers.

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: 28598821285

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.2 ★★★★★
Based on 29 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
C
Verified Purchase
Cassidy
Phoenix, US
★★★★★ 2
Awful
I love this brand & expected more, especially for the price. the gloves are super bulky and uncomfortable. they’re hard to get on and off and have a strange feeling when on because of the gel lining. they also smell odd. i wore them so about a week with several different creams/balms/lotions etc. i woke up with them off multiple times which makes me know that i was uncomfortable in them during my sleep. they also caused a weird breakout on my hands up to my wrists that took over a week to go away with the help of cortisone. it was like hives but more rash like. i didn’t bother attempting to return them and decided to throw them out. waste of money, time & ended up with a rash at the end. they did make my hands softer and helped with my cracked skin but at what cost?
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 20, 2023
J
Verified Purchase
Juztme
Fort Morgan, US
★★★★★ 3
Update - Stick to your hands
UPDATED - I am SO impressed with the seller!! They read my review and gave me a full refund even though I no longer had the gloves to return. At this point I would suggest that you aren't taking a big risk to give these gloves a try, a lot of people obviously love them, and if you don't you can certainly get your money back. Many thanks to the excellent seller! __________________________________________ I bought these because it seemed like there were a lot of good reviews. I hated these! I don't understand why anyone liked them... they are lined with thick sticky gel. You know those gel like sticky toys that kids toss at a wall and it sticks? Or do you recall the sticky, gummy hands that you could toss and they would pick up a piece of paper or something? The lining of these gloves make me think of those toys. So my experience is that they are very difficult to get on and once they're on they really bugged me after awhile I need to get them off, but they're very difficult to get off without turning the gloves inside out. ...then you have to try get them turned back to right side out... in the end I tried them and then thought I would try them one more time but they were such a pain in the rear that I ended up tossing them in the trash because I waited too long to be able to return them. One of my saddest purchases from Amazon!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2023
A
Verified Purchase
Amazon Customer
Los Angeles, US
★★★★★ 5
Hallelujah!
My hands were so dry and cracked until I got these babies. I didn't realize what I was getting myself into and was surprised when they were lined with some kind of silicone. Night one, I lathered my hands with whatever lotion I had laying around and went to bed. Now, these gloves are not super comfy because they're so thick, but not so bad that I won't use them. Anyway, wore them several hours and took them off in the middle of the night (they recommend at least 20-30 minutes). In the morning, my hands were baby soft. No cracks. No dryness in sight. AND it lasted all day. I did it the night after and I have not had dry hands for nearly 2 weeks! It's insane. I'm SO happy. Definitely worth it as a little treat yourself.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2023
B
Verified Purchase
Bonnie
Dallas, US
★★★★★ 5
Is this the CURE!
Size: Regular, Color: Cream
I have a skin disease called Ichthyosis Vulgaris. Yes, SCALEY FISH! Thanks MOM! This unfortunate crud leaves my heels an embarrassing mess! They are cracked and dry and literally like concrete. I have had this disease all my life and there is NO cure. It's hideous! Anyway, I have tried so many different experiments to help improve my situation. So much time and money I will never get back. So when I saw these, I had to give them a try too because I am a forever optimist and love being disappointed. Here's how it went. First I put my dermatologist recommended AmLactin on my crusty heels. Then, I put the socks on. By the way, with no problem at all, and went to bed. I was not too hot, which is usually what happens when I sleep with socks on. I never even realized that I had them on. When I woke up, I took them off and immediately used a "Heel File" over a towel removing all the yuck!. Then, I sand papered them to smooth the skin out. Then, I doused them with Shea and Aloe foot lotion I found at the bottom of my experiment drawer in my bathroom. Oh, they felt like someone else's feet. I am very hopeful at this moment! Is this the cure to my embarrassing situation? I sure hope so. Spring is here and I would really like to wear my cute flip-flops when I go to the Waffle House and set at the bar. Wasn't that a picture on Facebook of someone nasty heels? It made me gag. Then, I had to make sure that picture wasn't me! I am going to do this for a week and come back for another review. Wish me luck ya'll! UPDATE! So it’s been about two weeks. I wish that I had taken a before and after picture. I guess I figure that this too will be a waste of money. NO! These little socks are a God send for me. I did buy AmLactin foot repair cream and that I highly recommend. It’s the best so far. They also offer an option with heel socks. They are soft and work very well also but one negative. They leave fuzzies on you feet and tools. Guys this is it for me. My search is over! I went to my mani/pedi queen yesterday and she was shocked when she saw my feet. She is spreading the word!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2025
C
Verified Purchase
Crowder
Whiting, US
★★★★★ 5
Great reusable moisturizing
Size: Regular, Color: Cream
Love these! Use them often to help moisturize my heels with my favorite moisturizer. Comfortable and easy to use
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026

recommand products