Last season’s Division II champions doubled their season’s goals tally against promoted Magpies, to move above Grouville on goal-difference from three games each played.
Danny Craven and Joe Murphy each notched a brace with singles added by Lucas Parker, recently transferred from St Peter, Martin Sansom, Andy Modral and Ross Marquis.
Saints assistant manager Peter Flambard said: ‘Every point is precious to us, to have seven after three games has given us an excellent start.
Last time we were in the top flight we got eight points in total so it’s looking good.
‘Our target is around 13 or 14 points to stay in the division and hopefully we can make it.
‘New signing Lucas Parker had a good game in midfield on his début last night.
He has bags of energy and is a big asset for us.’ Magpies boss Ken Addison said: ‘St Ouen were easily the better side and fully deserved their win.
It was difficult losing the spine of our team, our goalkeeper cried off yesterday morning, our centre half is in hospital after falling through a shop window and our centre forward was working.
‘If our players want to get better and be successful then they have to attend training regularly and not just one or two attend occasionally.’