Bin there done that! 3VRH,(roughly equal to Lister JP3) light a fire in the bowl , climb on the counterweight, put the huge starting handle through the side , hang on to the provided grab handle with left hand and wind with the right, get it up to about 50 rpm, press the button to release the decompressors and away it goes .Can't do it now, too aged, but we finally fixed the electric start and that always gets it going, usually without any fires. Not bad for a 75 year old engine that's not had an overhaul since 1959.😀