688-44311-01 Yamaha Water Pump Housing | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Lower-Unit Water Pump Housing - Part Number: 688-44311-01

A genuine Yamaha water-pump housing for selected 60HP to 90HP two-stroke outboards.

The housing surrounds the impeller and directs water from the lower-unit inlet into the engine cooling tube. A smooth, correctly shaped internal chamber is essential for maintaining pump suction and pressure.

⚙️ Key Features

• Genuine Yamaha OEM water-pump housing
• Correct Yamaha part number 688-44311-01
• Used on Yamaha 60HP to 90HP two-stroke gearcases
• Replaces the earlier 688-44311-00 housing
• Cross-references with Sierra, Recmar and SEI complete-pump alternatives

🚤 Compatibility

Commonly used on

• Yamaha mid-range two-stroke lower-unit water pumps

Typically suits

• Engine models:
• Yamaha 60HP two-stroke
• Yamaha 60F two-stroke
• Yamaha 70HP two-stroke from approximately 2004 onward
• Yamaha 70B two-stroke
• Yamaha C75
• Yamaha E75
• Yamaha P75
• Yamaha C85 - approximately 1992-1995
• Yamaha 85A
• Yamaha 90HP two-stroke
• Yamaha 90A
• HP Range: 60HP - 90HP
• Engine Type: Yamaha carburetted two-stroke outboard
• Year Range: Approximately 1984 onward, dependent on gearcase

🔌 Function

The housing encloses the impeller and forms the pumping chamber needed to draw and pressurise cooling water.

⚠️ Common Signs of Failure

• Housing interior is scored or melted
• Weak or absent tell-tale stream
• Engine overheats despite a new impeller
• Housing is cracked, corroded or distorted
• Water leaks around the housing outlet or base

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 688-44311-01 → Supersedes 688-44311-00
• 688-44311-00 earlier Yamaha water-pump housing reference

OEM / Related Numbers

• 688-44311-01
• 688-44311-01-00
• 688443110100
• 688-44311-00
• 688-44352-03 related impeller
• 688-44315-A0 related lower water-pump gasket
• 688-44316-A0 related upper water-pump gasket
• 692-W0078-A0 related water-pump kit

Aftermarket / Verified Equivalents

• Sierra: 18-3171
• Recmar: REC688-44311-01
• SEI Marine: 96-498-01FK complete kit with housing
• PROMT / aftermarket complete housing kits replacing 688-44311-01

📦 Condition

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