6CJ-W0078-00 Yamaha Water Pump Kit | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha F70 Water Pump Repair Kit - Part Number: 6CJ-W0078-00

A genuine Yamaha lower-unit water-pump repair kit for F70 four-stroke outboards.

The kit contains the impeller and principal gaskets, plates and service components needed to restore cooling-water flow during scheduled maintenance or pump repair.

⚙️ Key Features

• Genuine Yamaha OEM water-pump repair kit
• Correct Yamaha part number 6CJ-W0078-00
• Superseded by Yamaha kit 6CJ-W0078-01
• Designed for Yamaha F70 four-stroke lower units
• Cross-references with Sierra, HJ Marine, Recmar and Quicksilver kits

🚤 Compatibility

Commonly used on

• Yamaha F70 four-stroke lower-unit water pumps

Typically suits

• Engine models:
• Yamaha F70A
• Yamaha F70AET
• Yamaha F70AETL
• Yamaha F70LA
• Yamaha F70LA2
• Yamaha F70LA 0310 and 0410 production
• Yamaha F70LA 2011-2016 production
• Yamaha F70LA approximately 2010-2021 under the original kit reference
• Later F70 production using superseding kit 6CJ-W0078-01
• HP Range: 70HP
• Engine Type: Yamaha inline-four EFI four-stroke outboard
• Year Range: Approximately 2010 onward

🔌 Function

The kit renews the pump components responsible for drawing water through the lower unit and circulating it through the engine cooling system.

⚠️ Common Signs of Failure

Common signs the kit is required

• Weak or intermittent tell-tale stream
• Engine overheats at idle or under load
• Impeller blades are cracked, stiff or missing
• Wear plate or cartridge insert is scored
• Scheduled water-pump service interval has been reached

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 6CJ-W0078-01 → Supersedes 6CJ-W0078-00
• 6CJ-W0078-00 earlier Yamaha water-pump repair-kit reference

OEM / Related Numbers

• 6CJ-W0078-01
• 6CJ-W0078-01-00
• 6CJ-W0078-00
• 6CJ-W0078-00-00
• 6CJW00780000
• 6CJ-44315-00 included water-pump gasket
• 6CJ-44324-00 included cartridge gasket
• 6H3-44352-00 included impeller
• 63D-44322-00 included cartridge insert

Aftermarket / Verified Equivalents

• Sierra: 18-3494
• HJ Marine: HJ-YHJB-6CJ
• Recmar: REC6CJ-W0078-00
• Quicksilver: 8M6012800
• Full Power Plus: 6CJ-W0078-00 replacement kit

📦 Condition

• Genuine Yamaha part
• Brand new
• Supplied in original or equivalent packaging