21277458 Cam | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta replaceable cam used inside the flexible-impeller seawater pump on D11 marine engines. The cam compresses the impeller vanes through part of each revolution, creating the displacement needed to draw and discharge raw water.

🚤 Compatibility

Typically suits:

• Volvo Penta D11B2-A MP
• Volvo Penta D11A-C MP
• Volvo Penta D11A-D MP
• Volvo Penta D11A-E MP
• Volvo Penta D11A-C (IPS)

• Engine Family: D

⚙️ Key Features

• Genuine Volvo Penta seawater-pump cam
• Used with Volvo Penta seawater pump 21219723
• Controls flexible-impeller vane compression
• Inspect screws, cover, wear surfaces and impeller together
• Engine type: Volvo Penta D11 inline-six common-rail marine diesel

🔌 Function

Deflects the impeller vanes to create suction and discharge chambers inside the seawater pump.

⚠️ Common Signs of Failure

• Reduced raw-water flow or overheating
• Deep grooves or erosion on the cam surface
• Impeller vanes failing to flex correctly
• Cavitation damage or corrosion
• Loose or damaged cam retaining screws

🛠️ Service Notes

• Fits Volvo Penta seawater pump 21219723 - confirm this is the pump fitted before ordering
• Fit a new impeller at the same time; a worn cam has usually already scuffed the vanes
• Note the cam's orientation before removal, since it only compresses the impeller correctly one way round

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21219723 - associated seawater pump
• 21277456 - associated pump/cooling cover
• 21277478 - associated cross-recessed screw

Aftermarket / Verified Equivalents

• JMP / Marine Energy Systems: CAMSET0038

📦 Condition

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