My 3 prong switch had a weak terminal so ordered another 3 prong ign switch. the old one was: ign ( red) st (black) and Bat ( grn)... the new switch says ign, st, M.. Im assuming M is starter motor. It cranks over with new switch but wont start. I switched the red and black and tried and nothing. Does anyone have a wiring schematic pic? I did take the terminal block off top of engine to clean it all up..Marked the wires but just want to make sure I have that right?