Dunno,but I think the Sabre was `shotgun cartridge` started,and that can lead to a lot of time-wasting ,if you`ve not got the priming/throttle /fuel cut-off correct.... if it`s wrong,you then have to wait for a couple of minutes before trying again,or fire one to `blow-out` if it`overprimed...or maybe the `safety disc ` has blown...6d pieces can be substituted ,if you`ve run out of spare discs..! At this point ,get out,have a coffee or two,go back,offer prayers to any `gods`,talk to `her` sweetly,make promises,and maybe ,just maybe ,she`ll start....
Much better to have an electric starter,good battery or `trolley-acc` for big engines,still requires `incantations`,and hopefully you`ll be rewarded with lots of `huffing,puffing,chugging,lots of smoke,and finally all cylinders chiming in....Don`t forget to thank your `gods....