128890-13530 Aftermarket Yanmar Stainless Steel Exhaust Elbow 21mm Water Inlet 128370-12530 / 128397-13530 HDI YMS | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Yanmar Stainless Steel Exhaust Elbow 21mm Water Inlet 128370-12530 / 128397-13530 HDI YMS - Part Number: 128890-13530

A cast AISI 316 stainless-steel exhaust mixing elbow replacing Yanmar 128890-13530, 128370-12530 and 128397-13530. This version uses a 21-22mm raw-water inlet and must be selected by measuring the original hose connection.

⚙️ Key Features

• Cast AISI 316 stainless-steel construction

• Replaces 128890-13530 / 128370-12530 / 128397-13530

• 21-22mm cooling-water inlet

• For later GM/YM compact diesel exhaust systems

• Select by water-inlet size before ordering

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 128890-13530 → Replaces or cross-references to 128370-12530 and 128397-13530

OEM / Related Numbers:

• 128890-13530

• 128370-12530

• 128397-13530

• YMS

Aftermarket / Verified Equivalents:

• HDI Marine: YMS

• Recmar: MAR128890-13530 variant

🚤 Compatibility

Commonly used on:

• Yanmar compact GM/YM wet-exhaust systems

Typically suits:

• Engine models:

• Yanmar 3GM30

• Yanmar 2YM15 below serial E4990

• Yanmar 3YM20 below serial E10518

• Yanmar 3YM30 below serial E17724

• Material: cast AISI 316 stainless steel

• Water Inlet: 21-22mm

• Installation Note: verify hose outside diameter on the original elbow

🔌 Function

The elbow turns engine exhaust and injects raw water before the wet exhaust 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