857451 Seawater Pump | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta pump with integrated cam, from the Cooling System group, weighing 1.823 kg and listed for 23 applications across the DP, SP and MS ranges. It supersedes 856952, which was catalogued earlier as a seawater pump. The integrated cam is the distinguishing feature - an earlier pump with a separate cam is not a like-for-like swap.

🚤 Compatibility

• Engine Family: DP, SP, MS

Full model list at the end of this description.

⚙️ Key Features

• With integrated cam
• 1.823 kg
• 23 applications across DP, SP and MS
• Supersedes 856952, catalogued earlier as a seawater pump

🔌 Function

Draws cooling water through the circuit, the impeller running against the integrated cam to generate the flow.

⚠️ Common Signs of Failure

• Cooling water flow reduced or lost at the outlet
• Engine running hotter than usual, especially under load
• Water weeping from the pump body or its telltale
• Impeller found with vanes taken a set, split or missing
• Rumble or shaft play felt at the drive end

🛠️ Service Notes

• If the old impeller shed vanes, find them downstream before running the engine - they block the cooler
• The cam is integrated in this pump; a separate cam from an earlier assembly does not apply
• Bearing carrier 856951 in this run covers much of the same fitment and is worth checking while the assembly is apart

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 857451 → Supersedes 856952 → Supersedes 841640 → Supersedes 826456

OEM / Related Numbers

• 856952 earlier number superseded by this part
• 855722 earlier number superseded by this part
• 841640 earlier number superseded by this part

Other-Brand OEM Numbers

• Johnson Pump: 10-24228-1

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 740B, 501B, 570A, 572A, 430A, 430B, 431A, 431B, 432A, 434A, 570, 500B, 430
• Volvo Penta DP-C, DP-C1, DP-D, DP-D1, DP-A, DP-A2
• Volvo Penta SP-C, SP-A2, SP-C1
• Volvo Penta MS4B