75 with no spark then spark

[svarn8]

park it in hot sun it won't run, park it in shade and it will, cold spray on switch box did not cause it to crank. I am getting 225 volts going into switch box via[ blue wire and ground] I am getting a reading of 5 on green wires and ground on coils. I deem switch box is bad, but for no reason let it cool off this evening and I bet it cranks up..