Cant replace some parts because all f-ing screws are rusted... to the point that the head "melts" away when i try to turn it. Not because I'm stripping it but because its all squishy and stuff... damn i'm pissed i soaked them in WD-40 and no help. WTH! some of the screws that are f-ed are the one holding the ign. rotor and coil...