A cordless drill will not spin it fast enough,you will need the rotostart starter.Your engine should come with instructions,will tell you
anything you need to know,you did not say how long the engine runs before it dies that would tell me a lot,what kind fuel,plug etc.
Is the car new? or how much fuel has been ran through it.Use diff fluid if they are sealed(most are sealed)to check, take diff
apart and check for seals, most are orange.If so clean out all grease in there and fill them to the crosspins with diff fluid,I
like to start with 3000 in front,7000 center and 3000 for the rear diff. If you do not have the instr for the engine go to
hot bodies web site they should have it there.