chuck a screwdriver across the two contacts on the solenoid(make sure its not in gear, did that myself and scared the shit outa myself) if it turns over could be having same problem as mine, it wasnt earthing properly when trying to turn it over from the ignition but was sweet when using a screwdriver, putting a few bolts through it sorted that. make sure its earthed and try jumping it again. At the moment im thinking coil doesn't effect starter, but im fucked atm so i could be wrong.