I have a Marvel carb on an o-320 and at anual I noticed a small leak at the accelarator pump. What is the cause and solution. It only has 150 hrs on it.
The accelerator pump circuit had two check balls, one or both may be leaking or there is some debris present. The plungers may also be worn or distorted.
T88
There is a leather packing sealing the pump shaft. It is likely dried out or damaged in some way if the leak is at the shaft wher it comes out fo the carb. It requires carb disassembly and special tools to replace the packing.
Good Luck,
Mahlon
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