863008 Mercruiser Elbow | Genuine Used Part

🔧 Product Description

Genuine MerCruiser Diesel Exhaust Elbow - Part Number: 863008

A genuine MerCruiser wet-exhaust elbow casting from the 863008A2 riser kit used on selected 1.7L DTI and QSD 2.0L marine diesel engines.

The elbow mixes engine exhaust with discharged cooling water and routes the combined flow into the vessel's exhaust hose. This listing is for the genuine used elbow component shown or supplied, rather than every gasket, clamp or fitting originally included with a new 863008A2 kit.

⚙️ Key Features

• Genuine MerCruiser OEM diesel exhaust elbow
• Casting number 863008
• Associated Mercury service assembly 863008A2
• Used on selected 1.7L DTI and QSD 2.0L diesel engines
• Water-injected wet-exhaust design

🚤 Compatibility

Commonly used on

• MerCruiser and Cummins MerCruiser 1.7L and 2.0L marine diesel wet-exhaust systems
• D1.7L DTI and QSD 2.0L exhaust-riser assemblies

Typically suits

• Engine models:
• MerCruiser D1.7L DTI - serial 0M055000 to 0M999999
• Cummins MerCruiser Diesel 1.7 MI 120 I/L4 - serial 88109041 and above
• Cummins MerCruiser Diesel 1.7 MS 120 I/L4 - serial 8810800 and above
• CMD QSD 2.0 EI 115 - serial 88200000 to 88200999
• CMD QSD 2.0 EI 130 - serial 88205000 to 88205098
• CMD QSD 2.0 EI 150 - serial 88220000 to 88220298
• CMD QSD 2.0 ES 130 - serial 88206000 to 88206398
• CMD QSD 2.0 ES 150 - serial 88221000 to 88221798
• HP Range: 115HP - 150HP
• Engine Type: MerCruiser / Cummins MerCruiser inline four-cylinder marine diesel
• Year Range: Approximately 2001-2011

🔌 Function

The elbow receives hot exhaust gases from the manifold and introduces cooling water downstream of the engine. It lowers exhaust temperature and directs the wet exhaust into the vessel's hose, silencer and outlet system.

⚠️ Common Signs of Failure

• External corrosion, cracking or water leakage
• Exhaust fumes or soot inside the engine compartment
• Internal salt or carbon restriction
• Cooling water entering the exhaust manifold or cylinders
• Overheating or excessive backpressure caused by a restricted elbow

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 863008A2 complete Mercury exhaust elbow / riser kit
• 863008 original elbow casting reference

OEM / Related Numbers

• 863008
• 863008A2
• 27-817089 related elbow gasket
• 27-882565 related exhaust gasket
• 54-815504256 related hose clamp
• 54-864148A01 related exhaust clamp
• 745061554474

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

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