673 Aftermarket Northern Lights Cast 316 Stainless Steel Exhaust Mixing Elbow 1.5 Inch | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Northern Lights Cast 316 Stainless Steel Exhaust Mixing Elbow 1.5 Inch - Part Number: NL1.5 / 673

A cast AISI 316 stainless-steel 1.5-inch wet exhaust mixing elbow for Northern Lights M643 and M673-series generator sets. It replaces the original Northern Lights and Lugger elbow references listed below and is supplied with a mounting gasket.

⚙️ Key Features

• 1.5-inch wet-exhaust outlet

• Cast AISI 316 stainless construction

• Direct replacement for Northern Lights original elbow

• Supplied with mounting gasket

• For compact M643/M673 generator families

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• HDI NL1.5 → Replaces NL-27-38007, NL-27-38008 and NL-27-38003

OEM / Related Numbers:

• HDI NL1.5

• 673

• NL-27-38007

• NL-27-38008

• NL-27-38003

• 135616570

Aftermarket / Verified Equivalents:

• HDI Marine: NL1.5

Included Components:

• Mixing elbow - Part Number: HDI NL1.5

• Mounting gasket - supplied with NL1.5

🚤 Compatibility

Commonly used on:

• Northern Lights compact marine generator wet-exhaust systems

Typically suits:

• Engine models:

• Northern Lights M643

• Northern Lights M673

• Northern Lights M673L

• Exhaust Outlet: 1.5 in OD

• Exhaust Bore: approximately 1.25 in ID

• Material: cast AISI 316 stainless steel

🔌 Function

The elbow routes generator exhaust and injects seawater before the exhaust enters the flexible hose.

Common signs of failure:

• External corrosion, cracking or pin-hole leakage

• Internal carbon, rust or salt restriction

• Cooling water entering the manifold, turbocharger or cylinders

• Steam, reduced cooling-water discharge or an abnormally hot exhaust hose

• Loss of power caused by excessive exhaust back-pressure

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging