21190855 Shim | Genuine Volvo Penta Part

🔧 Product Description

Genuine 0.25 mm calibration shim used to set injection-pump position and fuel timing on selected Volvo Penta D1 marine diesel engines.

🚤 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

• Nominal thickness: 0.25 mm
• Confirmed D1-20F application
• Documented D1-30F calibration use
• Precision injection-pump mounting shim
• Thickness selected from the timing procedure
• TH=0.25mm (Volvo assembly listing)

🔌 Function

The shim changes the installed height of the injection pump and adjusts the start of fuel injection.

⚠️ Common Signs of Failure

• Hard starting or poor running after injection-pump removal and refitting
• Smoke or fuel consumption noticeably changed
• Measured injection timing outside the specified value
• Shim dished, burred or picked up on its faces
• Fretting or a fuel or oil seep at the pump mounting joint found on strip-down

🛠️ Service Notes

• This is the 0.25 mm thickness, with 21190856 covering the 0.35 mm size in the same range
• Select from the measured timing procedure rather than copying the shim that came out

📦 Condition

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