Reply To: 1955 Johnson 5.5 hp converted to single fuel line with pump puking oil or carbon

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April 28, 2026 at 10:42 am #316722
CHUCK
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    Dicks…..What is your history with this motor and two-stroke motors in general?

    Specifically…..is this issue something “New” after the fuel pump conversion?   Or;  has the motor always exhibited these symptoms?

    If your motor is firing on both cylinders and is tuned…..there should not be oil “puking” out anywhere.  As others have stated….some unburned fuel is normal….especially in a barrel.

    Is the carburetor dialed in?  Are both cylinders firing?