Problem was engine would turn over and fuel was reaching carburettor but would make no attempt to start. Not even a kick. Mechanic checked electrics and could not find any fault. He then hot-wired ignition, battery to coil+ and engine started immediately. He was of the opinion that a hard to find resistor had failed in the wiring loom. There was a brown wire emerging from the wiring loom at rear top of engine which ran to a small unit with a red button also top of engine towards rear and referred to as a circuit breaker in my handbook. This wire ran to a terminal on the circuit breaker to which it was fastened by a nut. Mechanic disconnected the wire from CB and lengthened it and connected it to + of coil. Engine now starts and runs perfectly. My query is will there be any side effect/problem in the future with this repair. Thanks in advance for any help.