872438 Exhaust Flap Non-Return Valve for Volvo Penta Inboard & Drive

SERDAMARINE / MARINE EXHAUST PARTS

Exhaust Flap Non-Return Valve for Volvo Penta Inboard & Sterndrive

This aftermarket exhaust flap non-return valve (water shutter flapper valve) is referenced to Volvo Penta part number 872438 for specified Volvo Penta inboard and sterndrive applications, including 430–740 series, 31/41/42 series diesel engines, and DP/SP/MS drive models. It is supplied as an individual valve component rather than a multi-part repair kit.

Engine & Drive Applications

Applies to the following Volvo Penta inboard and sterndrive models requiring part reference 872438. Match the complete model designation and exact suffix when selecting your part—designations such as AD31D and AD31D-A, or DP-C and DP-C1, are distinct models and their separate listing does not establish interchangeability across unlisted variants.

• Volvo Penta 430Fits as listed
• Volvo Penta 430AFits as listed
• Volvo Penta 430BFits as listed
• Volvo Penta 431AFits as listed
• Volvo Penta 431BFits as listed
• Volvo Penta 432AFits as listed
• Volvo Penta 434AFits as listed
• Volvo Penta 500BFits as listed
• Volvo Penta 501BFits as listed
• Volvo Penta 570Fits as listed
• Volvo Penta 570AFits as listed
• Volvo Penta 572AFits as listed
• Volvo Penta 740BFits as listed
• Volvo Penta AD31BFits as listed
• Volvo Penta AD31DFits as listed
• Volvo Penta AD31D-AFits as listed
• Volvo Penta AD31XDFits as listed
• Volvo Penta AD41BFits as listed
• Volvo Penta AD41BJFits as listed
• Volvo Penta D41BFits as listed
• Volvo Penta DP-AFits as listed
• Volvo Penta DP-A2Fits as listed
• Volvo Penta DP-CFits as listed
• Volvo Penta DP-C1Fits as listed
• Volvo Penta DP-DFits as listed
• Volvo Penta DP-D1Fits as listed
• Volvo Penta DP-EFits as listed
• Volvo Penta KAD42BFits as listed
• Volvo Penta KAMD42BFits as listed
• Volvo Penta MD31AFits as listed
• Volvo Penta MS4BFits as listed
• Volvo Penta SP-A2Fits as listed
• Volvo Penta SP-CFits as listed
• Volvo Penta SP-C1Fits as listed
• Volvo Penta TAMD31BFits as listed
• Volvo Penta TAMD31DFits as listed
• Volvo Penta TAMD31MFits as listed
• Volvo Penta TAMD41BFits as listed
• Volvo Penta TAMD41PFits as listed
• Volvo Penta TAMD42BFits as listed
• Volvo Penta TMD31BFits as listed
• Volvo Penta TMD31DFits as listed
• Volvo Penta TMD41BFits as listed

Reference Numbers

Public part numbers are listed as identification references and do not alone establish interchangeability or original manufacturer identity.

Supplied Parts

• Exhaust flap non-return valve (supplied as a non-kit item, not a multi-part repair kit)

Service & Installation Notes

General service guidance only. Use the service manual for your exact engine and exhaust configuration.

1. Shut down the engine completely, allow the exhaust system to cool, and secure the system against accidental starting or water ingress if servicing below the waterline.
2. Access the exhaust passage or drive housing according to the Volvo Penta service manual, remove the worn flapper valve, and clear any loose fragments from the exhaust path.
3. Inspect the mounting seat and mating surfaces for corrosion or distortion, then install the new non-return valve in the correct flow orientation so the flap opens freely in the direction of exhaust discharge.
4. Reassemble the exhaust connections per factory procedures and inspect for abnormal noise or exhaust leaks during initial operation; stop the engine and inspect immediately if any issue occurs.

The Serdamarine Approach

Exhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.