Hi all I am currently restoring a Isabella for my boss at work , bit by bit , I've finally got it running but it cuts out when choke is off , Its had a electric fuel pump upgrade and I think it's had a air upgrade because when I search images on Google none are the same . I went to check the condition of the filter and when I removed the bottom of the housing it was full of clean oil ? About 5cm deep , I've also believe it's been converted to 12 v as all the others I see are 6v , I will take picture tomz ,