14478 14478T01 Mercruiser Exhaust Elbow Each (Per One Item) | Genuine Used Part

🔧 Product Description

Genuine MerCruiser 4.3L V6 Four-Inch Intermediate Exhaust Elbow - Part Number: 14478T01

A genuine used MerCruiser intermediate exhaust elbow for selected GM 4.3-litre V6 petrol sterndrive engines using a four-inch exhaust outlet.

The elbow connects the exhaust riser or manifold outlet to the lower exhaust tube and Y-pipe assembly. It is commonly used when converting the original one-piece V6 exhaust manifold arrangement to a later two-piece manifold-and-riser system.

This listing is for one individual exhaust elbow only.

⚙️ Key Features

• Genuine used MerCruiser exhaust elbow
• Correct OEM service part number 14478T01
• Casting references include 14478 and 14478-C01
• Four-inch exhaust-hose connection
• Used with selected V6 exhaust-manifold conversion systems

🚤 Compatibility

Commonly used on

• MerCruiser GM 4.3L V6 petrol sterndrive exhaust systems
• One-piece to two-piece exhaust-manifold conversions
• Centre-rise manifolds using a four-inch exhaust outlet

Typically suits

• Engine models:
• MerCruiser 175 V6
• MerCruiser 185 V6
• MerCruiser 190 V6
• MerCruiser 205 V6
• MerCruiser 4.3L
• MerCruiser 4.3LX
• MerCruiser 4.3L EFI
• MerCruiser 4.3L MPI applications using the applicable conversion system
• GM 229 CID V6 marine engines
• GM 262 CID V6 marine engines
• Applications using the original exhaust Y-pipe and four-inch connecting hose
• Power Range: Approximately 175HP - 205HP
• Engine Type: GM-based MerCruiser V6 petrol sterndrive
• Exhaust Outlet: Four-inch
• Year Range: Approximately 1983-2002, dependent on engine serial number and conversion configuration

🔌 Function

The intermediate elbow routes cooled exhaust gas and discharge water downward from the manifold or riser into the exhaust tube and Y-pipe.

⚠️ Common Signs of Failure

• Internal water passages are heavily corroded
• Exhaust gas leaks from a cracked casting
• Cooling water leaks into the exhaust passage
• Hose connection is corroded or damaged
• Mounting surfaces are pitted or distorted
• Engine-compartment exhaust fumes are present
• Water intrusion causes difficult starting or internal engine damage
• Elbow becomes restricted by rust or scale

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 14478T01 later OEM intermediate-elbow reference
• 14478T earlier service reference
• 14478 and 14478-C01 casting references

OEM / Related Numbers

• 14478T01
• 14478T
• 14478
• 14478-C01
• 710-14478T01
• 32-14358T related four-inch exhaust tube
• 54-815504372 related exhaust-hose clamp
• 27-863724 related exhaust gasket
• 864293A02 related MerCruiser 4.3L exhaust conversion kit
• 99746A17 related V6 exhaust-manifold assembly

Aftermarket / Verified Equivalents

• Barr Marine: MC-20-14478 - four-inch V6 conversion exhaust elbow
• GLM: 50750 - intermediate exhaust elbow tube
• Sierra: 18-1950-1 - related V6 conversion elbow reference
• HGE Marine: 14478T01 replacement intermediate elbow

📦 Condition

• Genuine used part
• Supplied and priced per one individual exhaust elbow
• Removed from running engine where applicable
• In good working condition unless otherwise stated