21662702 Vacuum Valve | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta vacuum valve for 19 mm hose. A vacuum valve should be fitted on any vessel whose engine installation sits at or below the waterline: it prevents siphonage through the seawater intake and the resulting water ingress to the engine. It weighs 0.054 kg and is listed for 28 applications across the D1, D2 and MD2010-2040 ranges. Hose diameter is what decides the order, with 16, 19, 22 and 25 mm listed.

🚤 Compatibility

• Engine Family: D, MD
• HP Range: 13-40 HP

Full model list at the end of this description.

⚙️ Key Features

• For 19 mm hose
• Fitted where the engine installation is at or below the waterline
• Prevents siphonage through the seawater intake
• 0.054 kg
• 28 applications across the D1, D2 and MD2010-2040 ranges
• Sized by cooling hose diameter
• Hose diameter: 19 mm
• Fits: Seawater cooling circuits on installations at or below the water line

🔌 Function

Admits air when the engine stops, breaking the siphon that could otherwise flood the exhaust manifold and cylinders with seawater.

⚠️ Common Signs of Failure

• Seawater leaking or dripping from the valve
• Valve blocked by salt crystals or debris
• Water siphoning into the exhaust after shutdown
• Valve element sticking so it will not admit air
• Cracked housing or hose connection

🛠️ Service Notes

• Order by hose diameter: 21662701 is 16 mm, 21662703 is 22 mm and 21662704 is 25 mm
• Mount the valve at the high point of the seawater circuit, above the waterline, and check the element is clear of salt at each service
• Fit one wherever the engine installation sits at or below the water line
• Hose diameter is the whole of the selection - 16, 19, 22 and 25 mm are listed

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21662702 → Supersedes 861497

OEM / Related Numbers

• 861497 earlier number superseded by this part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 D1-30, D1-30B, D1-30F, D1-13, D1-13B, D1-13F, D1-20, D1-20B, D1-20F
• Volvo Penta MD2010, MD2010B, MD2010-C, MD2010-D
• Volvo Penta MD2020, MD2020B, MD2020-C, MD2020-D
• Volvo Penta MD2030, MD2030B, MD2030-C, MD2030-D
• Volvo Penta MD2040, MD2040B, MD2040-C, MD2040-D
• Volvo Penta D2-40, D2-40B, D2-40F