Float valve with ball 1.75mm for Solex 40 PII-4 Carburetor. Porsche 356 B/C / 912

Float valve with ball 1.75mm for Solex 40 PII-4 Carburetor. 
Float Valve precisely regulates the fuel level within the carburetor float bowl of the Solex 40 PII-4 system, as used on Porsche 356 B/C and 912 engines. It operates via a tapered needle and seat mechanism that opens and closes the fuel inlet based on float movement, maintaining the correct 1.75 mm flow aperture and consistent bowl height.

Fits:
Porsche  356B / 356C  (Model: 1600 S90/SC, CARRERA, 587/1 692/3A)  1960-1965
Porsche 912 1.6L 1965 - 1969  (Engine code:  616/36/37)
Porsche 912 1.6L 1965 - 1969  (Engine code:  616/39/40)

Diagram ref no 46

Manufactured to replicates Porsche’s original geometry and sealing quality. It’s ideal for carburetor rebuilds, tuning, or replacing worn valves that cause flooding, lean conditions, or erratic mixture balance.

• Function: Regulates fuel entry to float bowl by closing inlet as float rises
• Fitment: Porsche 356 B/C and 912 with Solex 40 PII-4 carburetors
• Position: Inside float chamber cover (fuel inlet port)
• Flow Size: 1.75 mm – OE spec calibration
• Benefits: OE-style geometry, precise fuel control, leak-free sealing, reliable idle and acceleration
• Installation: Replace valve during carb rebuild; verify float height and seal tightness

Float valves wear naturally from constant fuel pressure, vibration, and ethanol exposure. As the tip or seat degrades, it can cause fuel overflow, hard starting, or lean running.

Replace this part when:
• Rebuilding the carburetor or adjusting float levels
• You notice fuel leakage, overflow, or inconsistent idle
• The needle shows grooves or corrosion on the tip
• Restoring carburetors to factory spec for balanced mixture control

Installing a new Float Valve ensures accurate bowl levels, steady fuel flow, and reliable operation of your classic Porsche 356 or 912’s Solex carburetors.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

61610097101

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