67C-14711-12-5B 67C-14711-005B Yamaha 40BET Muffler | Genuine Used Part

🔧 Product Description

Genuine Yamaha Four-Stroke Exhaust Muffler No. 1 - Part Number: 67C-14711-12-5B

A genuine Yamaha long-shaft exhaust muffler for selected FT25, F30 and F40 carburetted four-stroke outboards.

The supplied 67C-14711-12-5B is the long-shaft version. Part number 67C-14711-00-5B is the corresponding short-shaft muffler and is a related shaft-length variant rather than a direct interchangeable supersession. Yamaha now lists 67C-14711-12-CA as the later replacement for the long-shaft component.

⚙️ Key Features

• Genuine Yamaha four-stroke muffler No. 1
• Long-shaft part number 67C-14711-12-5B
• Later replacement 67C-14711-12-CA
• Related short-shaft version 67C-14711-00-5B
• Designed for Yamaha 25HP-40HP four-stroke upper casings

🚤 Compatibility

Commonly used on

• Yamaha long-shaft FT25, F30 and F40 four-stroke upper casings

Typically suits

• Engine models:
• Yamaha FT25BETL
• Yamaha FT25BETX
• Yamaha F30AEHTL
• Yamaha F30AETL
• Yamaha F30AMHDL
• Yamaha F40BETL
• Yamaha F40BMHDL
• Yamaha F40BWHDL
• Yamaha F40BWHTL
• HP Range: 25HP - 40HP
• Engine Type: Yamaha inline-three carburetted four-stroke outboard
• Shaft Length: Long-shaft configuration
• Year Range: Approximately 2000-2008, dependent on model code

🔌 Function

The muffler carries exhaust gas from the manifold through the upper casing and reduces exhaust resonance before the gases enter the lower-unit exhaust passage.

⚠️ Common Signs of Failure

• Exhaust becomes noticeably louder
• Muffler is cracked or internally corroded
• Exhaust or cooling water leaks at the gasket joint
• Engine produces fumes inside the lower cowling
• Internal restriction affects engine performance

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 67C-14711-12-CA → Supersedes 67C-14711-12-5B
• 67C-14711-12-5B long-shaft muffler reference
• 67C-14711-00-5B related short-shaft version

OEM / Related Numbers

• 67C-14711-12-CA
• 67C-14711-12-5B
• 67C-14711-00-5B
• 67C-41131-00-5B exhaust manifold No. 1
• 67C-41133-00-00 manifold gasket
• 62Y-41134-01-00 exhaust gasket
• 67C-45123-00-00 muffler gasket
• 62Y-45127-00-00 exhaust seal

Aftermarket / Verified Equivalents

• Aftermarket muffler gasket replacing 67C-45123-00-00
• Aftermarket exhaust gasket replacing 62Y-41134-01-00
• Specialist used 67C-14711-12 long-shaft muffler
• No direct aftermarket muffler casting

📦 Condition

• Genuine used part
• Confirm the required shaft-length version before installation
• Removed from running engine where applicable
• In good working condition unless otherwise stated