Southern Cross
That description was for a cold engine in winter (worst case). Our aeroplane lives outside, and gets very cold in winter. You may be right in that it could be under-primed. But I'm paranoid about start-up engine fires. I know Mark Jeffries has made good business from owners who have over primed ;~(
BTW there was a reference to 'starting it with a welly and a rope' in the 'other' Yak 52 article in 'Today's Pilot'. Not as daft as it sounds - I've seen photos of old aeroplanes being started by slipping a leather pouch over the upper prop tip, to which is attached a rope. severel big chaps pull on the rope, the prop turns, the pouch slips off and is pulled clear as soon as the blade rotates downwards, and the engine starts. Might be a useful accessory in case you get caught away from base with no air?
Thanks for the kind comments.