11997805 Plug | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta plug from the inlet and exhaust system group, used to seal an unused or service port on the intake or exhaust side of the engine. It fits D2-50F and D2-55 series marine diesels along with earlier MD22, TMD22 and TAMD31S engines. Supplied as a single plug with a net weight of approximately 0.016 kg.

🚤 Compatibility

Typically suits:

• Volvo Penta D2-55
• Volvo Penta D2-55B
• Volvo Penta D2-55C
• Volvo Penta D2-55D
• Volvo Penta D2-55E
• Volvo Penta D2-55F
• Volvo Penta D2-50F
• Volvo Penta TMD22A
• Volvo Penta TAMD31S
• Volvo Penta MD22A
• Volvo Penta MD22L
• Volvo Penta MD22P

• Engine Family: D, TMD, TAMD, MD
• HP Range: 50-55 HP
• Year Range: Approximately 1990s - 2010s

⚙️ Key Features

• Genuine Volvo Penta OEM part number 11997805
• System group: Inlet and Exhaust System
• Net weight approximately 0.016 kg
• Fits D2-50F, D2-55 series and earlier MD22, TMD22 and TAMD31S marine diesel engines
• Sold as a single plug
• Engine type: Volvo Penta 4-cylinder marine diesel

🔌 Function

The plug seals an unused or serviceable opening in the inlet or exhaust system so that air, boost pressure or exhaust gas cannot escape. It maintains a gas-tight closure at that port during normal engine operation.

⚠️ Common Signs of Failure

• Air, boost or exhaust leakage audible around the port
• Loose or backed-out plug found during inspection
• Corrosion, pitting or scaling on the plug body
• Damaged or stripped threads preventing correct tightening
• Soot staining or residue trails indicating a poor seal

🛠️ Service Notes

• Clean the threads and the seating face before fitting, and make sure the opening itself is clear of old sealant, swarf and corrosion
• Renew the sealing washer or O-ring where one is fitted rather than reusing a flattened one, and only use thread sealant where the workshop manual for your engine calls for it
• Tighten to the figure given in the workshop manual for your engine — plugs in aluminium and other soft castings strip easily, and a plug pulled up hard to cure a leak usually distorts the seat and makes it worse
• Where the plug closes an oil, fuel or coolant passage, run the engine up to temperature afterwards and check the joint under pressure before signing the job off
• Keep removed plugs paired with the holes they came out of during a strip-down — plugs of very similar appearance often differ in thread, reach or sealing type

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 11007806 related plug used on MD22 exhaust manifolds
• 859834 related manifold gasket
• 861574 related exhaust elbow

📦 Condition

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