688-44315-A0 Yamaha Gasket Water Pump | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Lower Water Pump Plate Gasket - Part Number: 688-44315-A0

A genuine Yamaha lower water-pump gasket fitted beneath the wear plate or outer cartridge plate on selected mid-range outboard gearcases.

The gasket seals the pump plate against the lower-unit housing, preventing water from bypassing beneath the impeller chamber.

⚙️ Key Features

• Genuine Yamaha OEM water-pump gasket
• Correct Yamaha part number 688-44315-A0
• Lower wear-plate sealing position
• Used in Yamaha 60HP to 130HP water-pump and gearcase service kits
• Cross-references with Sierra, Recmar, Mallory and SEI replacements

🚤 Compatibility

Commonly used on

• Yamaha mid-range two-stroke and four-stroke water-pump assemblies
• Yamaha 67F and 688 / 692-series pump kits

Typically suits

• Engine models:
• Yamaha 60HP two-stroke
• Yamaha 70HP and 70B two-stroke
• Yamaha 75HP, C75, E75 and P75
• Yamaha 80HP and C80
• Yamaha 85HP and C85
• Yamaha 90HP and C90
• Yamaha F75 four-stroke
• Yamaha F80 four-stroke
• Yamaha F90 four-stroke
• Yamaha F100 four-stroke
• Yamaha 115HP and 130HP gearcases using the 688-series water-pump base
• HP Range: 60HP - 130HP
• Engine Type: Yamaha two-stroke and four-stroke outboard
• Year Range: Approximately 1980s onward, dependent on lower-unit design

🔌 Function

The gasket seals beneath the water-pump plate so cooling water cannot bypass the impeller chamber.

⚠️ Common Signs of Failure

• Weak cooling-water flow after pump servicing
• Engine overheats despite a serviceable impeller
• Water leaks beneath the wear plate
• Gasket tears during disassembly
• Corrosion or gasket residue prevents the plate from sitting flat

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 688-44315-A0 current Yamaha OEM service reference

OEM / Related Numbers

• 688-44315-A0
• 688-44315-A0-00
• 68844315A000
• 688-44316-A0 related upper water-pump gasket
• 688-44324-A0 related cartridge gasket
• 688-44323-00 related outer plate
• 67F-W0078-00 related four-stroke pump kit
• 692-W0078-00 related two-stroke pump kit

Aftermarket / Verified Equivalents

• Sierra: 18-0239
• Recmar: REC688-44315-00
• Mallory: 9-60378
• SEI Marine: 95-499-07C
• Paragon: 688-44315-00 replacement gasket

📦 Condition

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