21194394 Shim | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta 0.25 mm calibration shim used beneath the fuel-injection pump on D2-50F engines. Shim thickness establishes pump position and injection timing; it must be selected according to the service measurement and must not be replaced with a random washer.

🚤 Compatibility

Typically suits:

• Volvo Penta D2-55F
• Volvo Penta D2-50F
• Volvo Penta D2-75F
• Volvo Penta D2-60F

• Engine Family: D
• HP Range: 50-75 HP

⚙️ Key Features

• Genuine Volvo Penta precision calibration shim
• Thickness: 0.25 mm
• Used for fuel-injection pump height and timing adjustment
• One of a graded shim series
• Measure and follow the workshop procedure before selecting thickness
• Engine type: Volvo Penta D2 four-cylinder mechanically injected marine diesel
• TH=0.25mm (Volvo assembly listing)

🔌 Function

Sets the injection-pump installed height so fuel-delivery timing remains within specification.

⚠️ Common Signs of Failure

• Incorrect injection timing after pump replacement
• Hard starting or excessive smoke
• Reduced power or harsh combustion noise
• Shim fretting, distortion or corrosion
• Measured pump height outside specification

🛠️ Service Notes

• Shims are supplied in graded thicknesses and exist to bring a setting into specification, so measure with a micrometer and select the thickness the setting procedure for your engine calls for rather than matching one by eye
• Note which shim came from which position on removal and keep them identified — once an assembly has bedded in, shims are not interchangeable between positions
• Check both faces are clean, flat and free of burrs, corrosion and old sealant before fitting; dirt trapped under a shim shifts the setting as surely as the wrong thickness does
• Discard any shim that is dished, cracked, pitted or fretted rather than reusing it, and make sure no old shim has been left behind in the recess
• Recheck the clearance or setting after the assembly is tightened down, because clamping load can change the measurement you took loose

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21194396 - 0.35 mm calibration shim
• 3583764 - other graded shim references
• 3583765 - other graded shim references
• 3583766 - other graded shim references
• 3801361 - injection pump

OEM Reman Alternatives

• 3801337 - remanufactured injection-pump references
• 3801531 - remanufactured injection-pump references

📦 Condition

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