21190856 Shim | Genuine Volvo Penta Part

🔧 Product Description

Genuine precision injection-pump shim used on selected Volvo Penta D1 engines. A 0.35 mm specification is documented for the D1-20F application, while D1-30 catalogue data must be checked directly because thickness references differ by revision.

🚤 Compatibility

Typically suits:

• Volvo Penta D1-30
• Volvo Penta D1-30B
• Volvo Penta D1-30F
• Volvo Penta D1-20
• Volvo Penta D1-20B
• Volvo Penta D1-20F

• Engine Family: D
• HP Range: 20-30 HP

⚙️ Key Features

• Confirmed D1-20F calibration application
• D1-20F nominal thickness: 0.35 mm
• Precision factory shim
• Controls injection-pump installed height
• D1-30F thickness must be verified from the engine-specific catalogue
• TH=0.35mm (Volvo assembly listing)

🔌 Function

The shim adjusts injection-pump height to calibrate the beginning of fuel injection.

⚠️ Common Signs of Failure

• Engine hard to start or running roughly after pump work
• Smoke or power output changed following injection-pump refitting
• Timing check falling outside the specified figure
• Shim distorted or marked where it has been clamped
• Seep or fretting at the injection-pump mounting face on strip-down

🛠️ Service Notes

• The 0.35 mm specification is documented for the D1-20F application, so check the engine-specific thickness before ordering for a D1-30
• Shim 21190855 is the 0.25 mm thickness in the same range

📦 Condition

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