SKU: 59272108835

Water Pump Impeller Repair Kit – Fits Yamaha 70 HP F70A 4-Stroke Outboard (Replaces 6CJ-W0078-00-00, 6CJ-W0078-01-00)

Sale price$39.15 Regular price$43.50
Save 10%

Pay in installments of $10.88 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Water Pump Impeller Repair Kit – Fits Yamaha 70 HP F70A 4-Stroke Outboard (Replaces 6CJ-W0078-00-00, 6CJ-W0078-01-00)Water Pump Impeller Repair Kit Fits Yamaha 70 HP F70A 4 Stroke Outboard (Replaces 6CJ W0078 00 00, 6CJ W0078 01 00) This water pump impeller repair kit provides a complete solution for servicing the cooling system on Yamaha 70 HP F70A 4 stroke outboard motors (20102021). It is designed for models with serial numbers starting with 6D7, ensuring a precise fit and restoring cooling performance. Engineered to meet or exceed OEM specifications, this kit

Water Pump Impeller Repair Kit – Fits Yamaha 70 HP F70A 4-Stroke Outboard (Replaces 6CJ-W0078-00-00, 6CJ-W0078-01-00)

This water pump impeller repair kit provides a complete solution for servicing the cooling system on Yamaha 70 HP F70A 4-stroke outboard motors (2010–2021). It is designed for models with serial numbers starting with 6D7, ensuring a precise fit and restoring cooling performance.

Engineered to meet or exceed OEM specifications, this kit serves as a direct replacement for Yamaha parts 6CJ-W0078-00-00 and 6CJ-W0078-01-00, as well as aftermarket equivalents like Sierra 18-3494.

  • Complete Service Kit: Includes the impeller, housing, wear plate, gaskets, seals, and all necessary hardware for a full replacement.
  • Direct Replacement: Designed for a direct fit, requiring access to the outboard's lower unit for installation.
  • Engine Compatibility: Specifically for Yamaha 70 HP 4-stroke models F70LA and F70A.

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
Sierra 18-3494
KUNOANZ KU-002017

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 F70LA 70 4-Stroke 2010-2021 6CJ-W0078-00-00, 6CJ-W0078-01-00 Models with serial numbers starting with 6D7
Yamaha F70A, AET 70 4-Stroke 2011-2015 6CJ-W0078-00-00 Serial numbers 6D71-6D79, 6D7A-6D7C

Technical Specifications

Specification Value
Product Type Water Pump Impeller Repair Kit
Installation Direct replacement; requires access to lower unit
Housing Material Plastic and metal components
Housing Color Black/Silver
Fitting Type Direct fit
Warranty 1 Year (Aftermarket)
Other Technical Attributes Complete water pump service kit including gaskets, seals, and hardware

Package Contents

  • 1 x Cover, Water Pump Housing (63D-44312-00/18-9083)
  • 1 x Cup, Insert (63D-44322-00/18-3449)
  • 2 x Seal, Water Damper (663-44366-00/18-1830)
  • 1 x Gasket, Water Pump (6CJ-44315-00/18-0448)
  • 1 x Gasket, Water Pump (6CJ-44316-00/18-0449)
  • 1 x Gasket, Water Pump (6CJ-44324-00/18-0450)
  • 1 x Plate, Wear (6CJ-44323-00/18-3186)
  • 1 x Impeller (6H3-44352-00/18-3069)
  • 2 x Bolt, With Washer (90119-08M14)
  • 2 x Bolt, With Washer (90119-08M33/18-0260)
  • 1 x Key, Woodruff (90280-03M03/18-3297)
  • 2 x Oil Seal (93101-23070/18-0297)
  • 1 x O-Ring (93210-46044/18-7436)
  • 2 x Pin, Dowel (93604-10M03/18-43717)

Installation Guide

  1. Disconnect Power: Disconnect the battery and shift the outboard into neutral.
  2. Access Lower Unit: Remove the bolts securing the lower unit (gearcase) and carefully lower it from the engine.
  3. Remove Old Pump: Unbolt and remove the old water pump housing to access the impeller.
  4. Inspect and Clean: Clean all gasket surfaces and inspect the housing and wear plate for scoring or damage.
  5. Install New Components: Lightly grease and install the new impeller, making sure the vanes are oriented correctly.
  6. Assemble New Pump: Install the new gaskets, wear plate, cup, and housing per the diagram. Ensure the Woodruff key is properly seated.
  7. Reinstall Lower Unit: Carefully guide the lower unit back into place, aligning the driveshaft, shift shaft, and water tube.
  8. Secure and Test: Tighten the lower unit bolts to the manufacturer's torque specifications. Reconnect the battery and test the engine in water to verify a strong water stream from the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this fits my engine?
First, check the Compatible Engine Models table on this page. It is crucial to match your engine's model, horsepower, and year range. For Yamaha engines, you should also verify your serial number against the notes provided in the table to ensure an exact match.

What are the signs my water pump impeller needs replacing?
Common signs of a failing impeller include the engine overheating at idle or low speeds, and a weak or inconsistent stream of water from the tell-tale (peephole) outlet. Visual inspection during routine maintenance may also reveal cracked, brittle, or worn impeller vanes.

How often should I replace the water pump impeller?
For preventative maintenance, it is recommended to inspect and likely replace the water pump impeller every 100-200 hours of operation or at least once every one to two years, even if no issues are apparent. Usage in saltwater or sandy/murky water may require more frequent service.

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: 59272108835

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.9 ★★★★★
Based on 13 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
P
Verified Purchase
patrick
Lexington, US
★★★★★ 5
From
Color: Dark Green, Size: Large
He looks like a very nice quality. Just the color did not match his girlfriend's dress.So we are going with an all black one
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
J
Verified Purchase
Janielle Rencher
West Palm Beach, US
★★★★★ 5
Buy it!
Color: Blue Green, Size: Medium, Color: Blue Green, Size: Medium
Bought this as my nephew’s graduation suit and it fit perfectly. Great quality and the color was exactly like the photos. He wore a size medium
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
A
Verified Purchase
Alesia
Lake Worth, US
★★★★★ 4
Nice but a different shade of purple than shown
Color: Light Purple, Size: Large, Color: Light Purple, Size: Large
Nice tux but not the color shown. It’s a really hard color to match. It’s more of a magenta-purplish-orchid color. Lolz we made it work, but just not the color intended
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
K
Verified Purchase
Karen Freeman
Chelsea, US
★★★★★ 5
Love them!
Color: Light Purple, Size: X-Large, Color: Light Purple, Size: X-Large
These looked awesome at the wedding my husband was a part of!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
P
Verified Purchase
Producto de muy buena calidad. Buena relación precio-valor.
New York, US
★★★★★ 5
Excelente.
Muy buena calidad.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2025

recommand products