977890 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta o-ring, supplied in the gasket kit as well as separately, and listed for 15 applications across TMD, AD, HS, TAMD, KAD and KAMD engines. No section diameter, inside diameter or material is published against this number, so order it by part number against the position it seals.

🚤 Compatibility

Typically suits:

• Volvo Penta TMD31D
• Volvo Penta TMD41B
• Volvo Penta AD31D
• Volvo Penta AD31D-A
• Volvo Penta AD31XD
• Volvo Penta HS1A
• Volvo Penta HS1E
• Volvo Penta HS1E-A
• Volvo Penta TAMD41B
• Volvo Penta TAMD31M
• Volvo Penta TAMD31D
• Volvo Penta TAMD42B
• Volvo Penta KAD42B
• Volvo Penta KAMD42A
• Volvo Penta KAMD42B

• Engine Family: TMD, AD, HS, TAMD, KAD, KAMD

⚙️ Key Features

• Included in the gasket kit
• Fits 15 applications across TMD, AD, HS, TAMD, KAD and KAMD engines
• No published dimensions — order by part number

📋 Kit Contents

• Included in gasket kit.

🔌 Function

Seals a joint by squashing into its groove, the trapped ring closing the gap between the two parts under compression.

⚠️ Common Signs of Failure

• Seeping or dripping at the joint the ring seals
• Ring found flattened, nipped or twisted on strip-down
• Rubber gone hard, glazed or crazed
• Ring nibbled or extruded at the groove edge
• Groove itself scored or corroded

🛠️ Service Notes

• If you are already buying the gasket kit for this job, this ring comes in it — check before ordering it separately
• O-rings are single-use; never refit one that has been compressed

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging