Yes you are spot on. Compressed air at a low level and some straight petrol, admittedly I removed the tank so that I could shake the new petrol around the tank as a cleaner and then the congealed patch of oil came out. I then ran the air backwards through the fuel line and all was cleared.
Cheers, BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.