856910 Exhaust Riser | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta exhaust riser from the Inlet and Exhaust System group, weighing 7.711 kg and listed for 26 applications across the BB, DP, SP, MS and SHIELD groups. It supersedes 856639. The other riser in this run, 856891, is listed at 7.688 kg for 25 applications and supersedes 855384 - 23 grams apart, so the superseded number and the part number are the only safe guides.

🚤 Compatibility

• Engine Family: BB, DP, SP, MS, S

Full model list at the end of this description.

⚙️ Key Features

• Inlet and Exhaust System exhaust riser
• 7.711 kg
• 26 applications across BB, DP, SP, MS and SHIELD
• Supersedes 856639 - only 23 grams from riser 856891
• 2 used per assembly

🔌 Function

Lifts the exhaust above the waterline as it leaves the manifold, and introduces the cooling water into the gas stream.

⚠️ Common Signs of Failure

• Water tracking back towards the manifold or cylinders
• Exhaust blowing or ticking at a flange joint
• Rust scaling, blistering or a soft flaking patch
• Internal passage furred or partly blocked
• Steam or water weeping at a previously dry joint

🛠️ Service Notes

• Order against the superseded number where possible - 856639 comes through as this riser, 855384 as 856891
• Renew all flange gaskets and check the faces for flatness and corrosion
• Water ingress through a failed riser reaches the cylinders quickly - do not run the engine on a suspect one

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 856910 → Supersedes 856639 → Supersedes 856426

OEM / Related Numbers

• 856639 earlier number superseded by this part
• 856426 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 740B, 501B, 570A, 572A, 740A, 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 BB740A
• Volvo Penta MS4B
• Volvo Penta Shield for 740A