I'm not sure about the 24v but my 12v has a manual prime pump near the fuel filter , pump untill you feel resistance and or hear a little squeal , then crack a couple injector lines and pump till they flow some fuel , then tighten , and crank , bring jumper cables , it can take some time and multible trys , I just remebered you said 24v , cycle key 4-6 [ to on , not to start ] times to get fuel moving then see if it starts a few cranks , if not cycle key to pump fuel again , and then to start .