since 1940

Fuel dripping out of aircraft carburetor. Flooded Marvel Schebler carburetor

2. Leaking carburetor needle and seat.

3. Auto fuel. Adjust idle mixture.

4. Carburetor models NAS 3A1 and NAS 3B. In certain airplane installations the fuel level in the carburetor is above the present idle air-bleed location while the airplane is parked. It is possible for the fuel to drain from the fuel tank through the carburetor and out of the idle air-bleed onto the ground. Refer to Bendix-Stromberg Revision No. 1 of Service Bulletin 73 dated June 134, 1958.

5. Float in Marvel Schebler carburetor sinking.

6. Marvel Schebler carburetor float shaft and bracket worn.

7. Broken check valve spring. Normally causes a rich mixture. Fuel shows up as a stain on carburetor where excessive fuel has been dripping from the accelerator pump nozzle and washing against the side of the carburetor.
 

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Disclaimer: sacskyranch.com contains abundant information relating to aircraft maintenance. The information provided  is not intended to supercede or supplement the F.A.A. approved  maintenance and/or operator’s manuals. Those F.A.A. approved manuals must be utilized when performing maintenance and/or operating aircraft.