Pump jet (GP) 50 for Solex 40 PII-4 carburetor. Porsche 356 / 912  ❭  61610093600

Pump jet (GP) 50 for Solex 40 PII-4 carburetor. 
This jet controls the volume of fuel delivered under pump or transition circuits, ensuring correct mixture strength during acceleration or high-demand engine conditions. By matching the original dimensions, flow bore and material characteristics, this replacement part maintains factory-style calibration and helps ensure consistent drivability and fuel metering.
Sold each, 4 required per vehicle.

Fits:
Porsche 356 (Model: CARRERA 1600 GS/GT, 6922) 1950 - 1959
Porsche 356 (Model: CARRERA 1500 GS/GT,  40 PII-4) 1950 - 1959
Porsche  356B / 356C  (Model: 1600 S90/SC, CARRERA, 587/1 692/3A)  1960-1965
Porsche 912 1.6L 1965 - 1968  (Engine code:  616/36/37)

Diagram ref no 16

•  Function: Regulates fuel flow through the pump / transition circuit in the carburetor
•  Position: Within the carburetor body, pump / high-demand fuel circuit

Over time, metering jets like the pump jet may suffer from erosion, corrosion, or deformation, especially due to fuel additives or long‐term use. A worn or mis-sized jet can lead to rich/lean conditions, hesitation, flat spots during acceleration, or unstable mixture transitions.

Replace this jet when:
•   You are performing a full carburetor rebuild or overhaul
•   Your engine shows hesitation, poor acceleration or throttle flat spots
•   The original jet is missing, damaged, or shows signs of internal wear.
•   You want to restore factory-correct fuel metering for reliable classic Porsche performance.

Installing a new Pump Jet ensures accurate fuel delivery, consistent mixture behaviour and helps maintain the authentic feel and smooth acceleration of your classic Porsche.

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61610093600

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