21662701 Vacuum Valve | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta vacuum valve for 16 mm hose - the smallest of the four sizes listed. 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 water ingress to the engine that follows. It weighs 0.045 kg and is listed for 29 applications on the 2000 series and MS drives. Hose diameter is the whole of the selection: 16, 19, 22 and 25 mm.

🚤 Compatibility

• Engine Family: D, MS

Full model list at the end of this description.

⚙️ Key Features

• For 16 mm hose - the smallest of the four sizes
• Fitted where the engine installation is at or below the waterline
• Prevents siphonage through the seawater intake
• 0.045 kg
• 29 applications
• Sized by cooling hose diameter
• Hose diameter: 16 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 let seawater run through the intake and flood the exhaust manifold and cylinders.

⚠️ 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: 21662702 is 19 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

• 21662701 → Supersedes 828537 → Supersedes 828271

OEM / Related Numbers

• 828537 earlier number superseded by this part
• 827952 earlier number superseded by this part
• 833687 earlier number superseded by this part
• 833685 earlier number superseded by this part
• 838154 earlier number superseded by this part
• 838207 earlier number superseded by this part
• 828271 earlier number superseded by this part

Other-Brand OEM Numbers

• Johnson Pump 09-47316-02

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 2003, 2003R, 2003R SOLAS, 120S-B, 2003TB, 2003TB SOLAS, 120SC, 2001AG, 2001B, 2001BG, 2001D, 2003D, 2003T, 2003TR, 2002AG, 2002B, 2002BG, 2002D, 2003B, 2003B SOLAS, 2003 SOLAS, 2001, 2002, 2001R
• Volvo Penta MS2B-A, MS2B, MS2V
• Volvo Penta D2002AG
• Volvo Penta D2003AG