dont know the boiler but having had similar one if the leak around the housing holding water and the igniter it could be a sign that this metal housing has cracks which allows water to enter the oil/air compartment and the reason why not firing up properly-if this is true the oil chamber will be full with oil and a lot of water - we had a local guy knew them inside out and he syphoned out the oil/air chamber - fired up and all was well but advised to ensure unit not to be switched off for long periods as the water would seep through so we allowed timer to put heat on each day for short time - its still working 6 years after!good luck
eddie
January 2010