6N6-W0078-02 Yamaha Water Pump Kit | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Complete Water Pump Service Kit - Part Number: 6N6-W0078-02

A genuine Yamaha water-pump kit for selected 100HP to 140HP two-stroke and early F115 four-stroke outboards.

The kit contains the impeller, wear plate, cartridge insert, pump gasket, O-rings, dowels, bolts and drive key required for a comprehensive lower-unit pump service.

⚙️ Key Features

• Genuine Yamaha OEM water-pump kit
• Correct current Yamaha part number 6N6-W0078-02
• Complete impeller, plate, insert, seal and hardware package
• Uses Yamaha impeller 6E5-44352-01
• Sierra, HJ Marine and SEI replacements available

🚤 Compatibility

Commonly used on

• Yamaha V4 lower-unit water pumps
• Early Yamaha F115 four-stroke gearcases

Typically suits

• Engine models:
• Yamaha 100A two-stroke - approximately 1997-2000
• Yamaha 115B two-stroke - approximately 1997-2011
• Yamaha 115C two-stroke - approximately 1997-2013
• Yamaha 130B two-stroke - approximately 1997-2014
• Yamaha 140B two-stroke - 2003 production
• Yamaha F115A four-stroke - approximately 2000-2001
• Corresponding L-series counter-rotation applications where the pump diagram specifies 6N6-W0078-02
• HP Range: 100HP - 140HP
• Engine Type: Yamaha V4 two-stroke and early inline-four F115 four-stroke
• Year Range: Approximately 1997-2014, dependent on engine model.

🔌 Function

The kit renews the water-pump components responsible for drawing seawater through the lower unit and circulating it through the powerhead.

⚠️ Common Signs of Failure

Common signs the kit is required

• Weak tell-tale stream
• Engine overheats under load
• Impeller vanes are damaged
• Wear plate or cartridge insert is scored
• O-rings or gasket leak around the pump housing

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 6N6-W0078-02 → Supersedes 6N6-W0078-01
• 6N6-W0078-01 earlier OEM water-pump kit reference

OEM / Related Numbers

• 6N6-W0078-02
• 6N6-W0078-02-00
• 61A-44322-02 cartridge insert
• 93210-86M38 O-ring
• 93210-37M67 O-ring
• 6E5-44352-01 impeller
• 6E5-44323-00 wear plate
• 6E5-44315-A0 gasket
• 93606-12019 dowel
• 90119-08M14 bolt with washer
• 90280-04M05 woodruff key

Aftermarket / Verified Equivalents

• Sierra: 18-3313-1
• Sierra: 18-3312 related pump kit
• HJ Marine: YHJB-6N6
• SEI Marine: 96-405-01K
• Aftermarket Yamaha 6N6 complete water-pump kit

📦 Condition

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