My POH for the Warrior II 161 allows 7lbs of fuel for "Engine start, taxi and run up" (Section 6.7, Weight and Balance).
7.2lbs is an Imperial Gallon, so that's about 1 Gallon or 4.5 litres.
I know from records that my Warrior uses about 28 litres per hour of engine time (don't use that figure for flight planning!), so 4.5 litres is just short of 10 minutes but probably much more in reality as that 28l/hour figure is based on the engine running much harder for most of the hour.
Last edited by jollyrog; 26th Jan 2013 at 14:35.