129472-18090 Aftermarket Yanmar JH Exhaust Gasket HDI GJH | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Yanmar JH Exhaust Gasket HDI GJH - Part Number: 129472-18090

A graphite exhaust flange gasket replacing Yanmar 129472-18090 on naturally aspirated JH-series engines. It seals the engine outlet to the JHL lower exhaust bend or complete JHKIT assembly.

⚙️ Key Features

• Graphite high-temperature gasket

• Replaces Yanmar 129472-18090

• For naturally aspirated 3JH and 4JH engines

• Used with JHL, JHKIT90 and JHKIT180

• Replace whenever the lower bend is removed

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• GJH → Replaces Yanmar 129472-18090

OEM / Related Numbers:

• 129472-18090

• HDI GJH

• 129170-13000

• JHKIT90

• JHKIT180

Aftermarket / Verified Equivalents:

• HDI Marine: GJH

🚤 Compatibility

Commonly used on:

• Yanmar JH exhaust-manifold flange joints

Typically suits:

• Engine models:

• Yanmar 3JH2E

• Yanmar 3JH3E

• Yanmar 3JH5E

• Yanmar 4JHE

• Yanmar 4JH2E

• Yanmar 4JH2CE

• Yanmar 3JH25A

• Yanmar 3JH30A

• Material: graphite

• Joint: engine exhaust outlet to lower bend

🔌 Function

The gasket seals the hot exhaust flange between the engine and lower bend.

Common signs of failure:

• Black soot tracking around the joint

• Cooling-water seepage or salt deposits at the flange

• Exhaust smell or fumes in the engine compartment

• Burnt, split, crushed or hardened sealing material

• Corrosion or erosion of the mating faces

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging