Not sure what you mean turn on? Does it crank over? check solenoid on fender .battery good? starter good? ignition switch good? can`t remember if it had switch on clutch pedal(looks like brake switch) that would keep it from starting.if it cranks over but no start,check ignition system,wires, coil,brain box on fender,distributor inside....etc. hopes this helpsMy 1976 Cobra 2, the engine turns but does not turn on, tried adjusting the shifter but still the same. could it be the carburettor?