6E5-14711-01-EK 6E5-14711-00-5B Yamaha Exhaust Manifold | Genuine Used Part

🔧 Product Description

Genuine Yamaha Primary Exhaust Muffler No. 1 - Part Number: 6E5-14711-01-EK

A genuine Yamaha primary exhaust muffler for selected 115HP to 225HP V4 and V6 carburetted and fuel-injected two-stroke outboards.

This component is a muffler and exhaust tube rather than an exhaust manifold. It installs inside the upper casing and carries exhaust from the manifold toward the lower midsection.

The 6E5 muffler family includes several service and finish-coded references, including 6E5-14711-01-EK, 6E5-14711-01-CA, 6E5-14711-01-5B, 6E5-14711-00-5B and 6E5-14711-00-9M.

⚙️ Key Features

• Genuine Yamaha primary exhaust muffler
• Current or later reference 6E5-14711-01-EK
• Related earlier reference 6E5-14711-00-5B
• Fits selected Yamaha V4 and V6 two-strokes
• Maintains factory exhaust length and back pressure

🚤 Compatibility

Commonly used on

• Yamaha V4 and V6 two-stroke upper-casing exhaust assemblies

Typically suits

• Engine models:
• Yamaha 115HP V4
• Yamaha 130HP V4
• Yamaha 150HP V6
• Yamaha 175HP V6
• Yamaha 200HP V6
• Yamaha 225HP V6
• Yamaha Z150, Z175 and Z200 applications using the 6E5 primary muffler
• Standard and counter-rotation models with the matching upper casing
• HP Range: 115HP - 225HP
• Engine Type: Yamaha V4 or V6 carburetted, EFI or HPDI two-stroke outboard
• Year Range: Approximately 1984-2008 for the documented 6E5 muffler family

🔌 Function

The primary muffler carries exhaust from the upper manifold into the engine midsection. Its length and internal shape reduce exhaust noise and help maintain the correct exhaust-pulse tuning and back pressure.

⚠️ Common Signs of Failure

• Engine exhaust becomes louder
• Muffler is cracked, burnt or corroded
• Exhaust gas leaks inside the upper casing
• Damaged gaskets allow water or soot leakage
• Restricted internal passages reduce high-speed engine performance

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 6E5-14711-01-CA / 6E5-14711-01-EK later service or finish-coded references
• 6E5-14711-01-5B earlier muffler reference
• 6E5-14711-00-5B earlier muffler reference
• 6E5-14711-00-9M related earlier finish-coded reference

OEM / Related Numbers

• 6E5-14711-01-EK
• 6E5-14711-01-CA
• 6E5-14711-01-5B
• 6E5-14711-00-5B
• 6E5-14711-00-9M
• 6E5-14737-00-00 muffler damper
• 6E5-45123-00-00 muffler gasket
• 6E5-41135-A0 exhaust-manifold gasket
• 64D-41132-00-CA related manifold on applicable 150HP-200HP engines

Aftermarket / Verified Equivalents

• Aftermarket muffler gasket replacing 6E5-45123-00-00
• Aftermarket manifold gasket replacing 6E5-41135-A0
• Specialist used or reconditioned 6E5 primary muffler
• No direct aftermarket muffler casting

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated