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I just installed a two pipe oil feed and return. the burner
starts, runs for ten seconds the fire stops for five sec.
then resumes and finishes the heating cycle. Don't know if
the spark or the oil is the one that is causing it. I bled the pump. New transformer end of last heating season.
Bouds Stumped


  • brucewo1b
    brucewo1b Member Posts: 638
    It sounds more like

    air in the supply piping once the air passes it goes back to firing. Did you put the return in the tank so it is an inch or so above the supply? If not it can draw back air and get in the system.
  • Jerry Boud
    Jerry Boud Member Posts: 3

    Thanks for the comeback Bruce,The return is 3in. above the supply line.
  • brucewo1b
    brucewo1b Member Posts: 638
    Then I would be looking for air

    getting in at fittings, pressure or vaccum test the lines. I have had a couple of times pump strainer gaskets not tight or filter gaskets leaking
  • Jerry Boud
    Jerry Boud Member Posts: 3
    Bruce Stevens Thanks

    Thanks Bruce, thats what it was. The gasket between the pump filter, and the pump. Thanks again

    Jerry Boud
  • brucewo1b
    brucewo1b Member Posts: 638
    Jerry Glad it worked out

    and thanks for letting me know
  • Steve_35
    Steve_35 Member Posts: 546
    Things to keep in mind.

    Once the flame is lit, you don't need the spark any more.

    With two pipe you're moving a LOT more oil. This causes higher vacuum because the more fluid you put through a pipe the more resistance there is to flow. Since one line is under vacuum the increased resistance causes higher vacuum. That can exacerbate any air leaks.

    Filters need to be replaced more often because you're pumping the pump, not the nozzle.

    Best bet is to install a Tiger Loop instead of a 2 pipe.
This discussion has been closed.