6E5-44315-A0 Yamaha Water Pump Gasket | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Water Pump Base Gasket - Part Number: 6E5-44315-A0

A genuine Yamaha lower-unit water-pump gasket for selected mid- and high-horsepower outboards.

The gasket seals the water-pump base and wear-plate assembly to the gearcase. It prevents cooling water and suction pressure escaping around the pump chamber.

⚙️ Key Features

• Genuine Yamaha OEM water-pump gasket
• Correct current Yamaha part number 6E5-44315-A0
• Supersedes earlier gasket 6E5-44315-00
• Used with the 6E5-series high-horsepower water pump
• Sierra and Recmar replacements available

🚤 Compatibility

Commonly used on

• Yamaha mid- and high-horsepower lower-unit water pumps
• Water-pump assemblies using the 6E5-series impeller and housing

Typically suits

• Engine models:
• Yamaha 115HP two-stroke
• Yamaha 130HP two-stroke
• Yamaha 150HP two-stroke
• Yamaha 175HP two-stroke
• Yamaha 200HP two-stroke
• Yamaha 225HP two-stroke
• Yamaha 250HP two-stroke
• Yamaha 300HP two-stroke applications using the 6E5 pump family
• Yamaha F115 four-stroke
• Yamaha F150 four-stroke
• Yamaha F200 four-stroke
• Yamaha F225 four-stroke
• Yamaha F250 four-stroke
• Corresponding LF counter-rotation models where the lower-unit diagram specifies 6E5-44315-A0
• HP Range: Approximately 115HP - 300HP
• Engine Type: Yamaha V4 / V6 two-stroke and four-stroke outboard
• Year Range: Approximately 1984 onward, dependent on gearcase and pump configuration

🔌 Function

The gasket seals the pump base so the impeller can draw water through the gearcase intakes and deliver it to the powerhead without pressure loss.

⚠️ Common Signs of Failure

• Weak tell-tale stream
• Engine overheats at idle or under load
• Air enters around the pump base
• Gasket tears during pump disassembly
• Cooling performance remains poor after impeller replacement

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 6E5-44315-A0 → Supersedes 6E5-44315-00
• 6E5-44315-00 earlier OEM water-pump gasket reference

OEM / Related Numbers

• 6E5-44315-A0
• 6E5-44315-A0-00
• 6E5-44315-00
• 6E5-44352-01 related impeller
• 6G5-44323-01 related wear plate
• 6E5-W0078-series related water-pump kits

Aftermarket / Verified Equivalents

• Sierra: 18-0244
• Recmar: REC6E5-44315-A0
• AMS: 6E5-44315-A0 replacement gasket
• Aftermarket Yamaha water-pump gasket: 6E5-44315-A0 replacement

📦 Condition

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